initial

src/main/java/spring/ai/mcp/McpApplication.java

@@ -0,0 +1,77 @@
+package spring.ai.mcp;
+
+import java.time.Duration;
+import java.util.List;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import spring.ai.mcp.client.McpClient;
+import spring.ai.mcp.client.stdio.StdioServerParameters;
+import spring.ai.mcp.client.stdio.StdioServerTransport;
+
+import org.springframework.ai.chat.client.ChatClient;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+
+@SpringBootApplication
+public class McpApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(McpApplication.class, args);
+	}
+
+	@Bean
+	public CommandLineRunner test(ChatClient.Builder chatClientBuilder, List<McpFunctionCallback> functionCallbacks) {
+
+		return args -> {
+
+			var chatClient = chatClientBuilder.defaultFunctions(functionCallbacks.toArray(new McpFunctionCallback[0]))
+				.build();
+
+			var response = chatClient.prompt("What is the content of the test.txt file?").call().content();
+			System.out.println(response);
+
+			response = chatClient.prompt(
+					"Please summarize the content of the test.txt file, covert the result in markdown format and store it into test.md")
+				.call()
+				.content();
+			System.out.println("Summary:" + response);
+		};
+	}
+
+	@Bean
+	public List<McpFunctionCallback> functionCallbacks(McpClient mcpClient) {
+
+		return mcpClient.listTools(null)
+			.tools()
+			.stream()
+			.map(tool -> new McpFunctionCallback(mcpClient, tool))
+			.toList();
+	}
+
+	@Bean(destroyMethod = "close")
+	public McpClient clientSession() {
+
+		var stdioParams = StdioServerParameters.builder("npx")
+			.args("-y", "@modelcontextprotocol/server-filesystem",
+					"/Users/christiantzolov/Dev/projects/demo/mcp-server/dir")
+			.build();
+
+		McpClient mcpClient = null;
+		try {			
+			mcpClient = new McpClient(new StdioServerTransport(stdioParams, Duration.ofMillis(100)),
+					Duration.ofSeconds(10), new ObjectMapper());
+
+			var init = mcpClient.initialize();
+
+			System.out.println("MCP Initialized: " + init);
+
+			return mcpClient;
+		}
+		catch (Exception e) {
+			throw new RuntimeException(e);
+		}
+	}
+
+}

src/main/java/spring/ai/mcp/McpFunctionCallback.java

@@ -0,0 +1,67 @@
+/*
+* Copyright 2024 - 2024 the original author or authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+package spring.ai.mcp;
+
+import java.util.Map;
+
+import spring.ai.mcp.client.McpClient;
+import spring.ai.mcp.spec.McpSchema.CallToolRequest;
+import spring.ai.mcp.spec.McpSchema.CallToolResult;
+import spring.ai.mcp.spec.McpSchema.Tool;
+
+import org.springframework.ai.model.ModelOptionsUtils;
+import org.springframework.ai.model.function.FunctionCallback;
+
+/**
+ * @author Christian Tzolov
+ * @since 1.0.0
+ */
+
+public class McpFunctionCallback implements FunctionCallback {
+
+	private final McpClient mcpClient;
+
+	private final Tool tool;
+
+	public McpFunctionCallback(McpClient clientSession, Tool tool) {
+		this.mcpClient = clientSession;
+		this.tool = tool;
+	}
+
+	@Override
+	public String getName() {
+		return this.tool.name();
+	}
+
+	@Override
+	public String getDescription() {
+		return this.tool.description();
+	}
+
+	@Override
+	public String getInputTypeSchema() {
+		return ModelOptionsUtils.toJsonString(this.tool.inputSchema());
+	}
+
+	@Override
+	public String call(String functionInput) {
+		Map<String, Object> arguments = ModelOptionsUtils.jsonToMap(functionInput);
+		CallToolResult response = this.mcpClient.callTool(new CallToolRequest(this.getName(), arguments));
+		// Todo handle errors
+		return ModelOptionsUtils.toJsonString(response.content());
+	}
+
+}

src/main/java/spring/ai/mcp/client/McpClient.java

@@ -0,0 +1,278 @@
+/*
+* Copyright 2024 - 2024 the original author or authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+package spring.ai.mcp.client;
+
+import java.time.Duration;
+import java.util.concurrent.CompletableFuture;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import spring.ai.mcp.spec.McpSchema;
+import spring.ai.mcp.spec.McpSession;
+import spring.ai.mcp.spec.McpTransport;
+import spring.ai.mcp.spec.McpSchema.CallToolRequest;
+import spring.ai.mcp.spec.McpSchema.CallToolResult;
+import spring.ai.mcp.spec.McpSchema.ClientCapabilities;
+import spring.ai.mcp.spec.McpSchema.Implementation;
+import spring.ai.mcp.spec.McpSchema.InitializeRequest;
+import spring.ai.mcp.spec.McpSchema.InitializeResult;
+import spring.ai.mcp.spec.McpSchema.ListResourceTemplatesResult;
+import spring.ai.mcp.spec.McpSchema.ListResourcesResult;
+import spring.ai.mcp.spec.McpSchema.ListToolsResult;
+import spring.ai.mcp.spec.McpSchema.PaginatedRequest;
+import spring.ai.mcp.spec.McpSchema.ReadResourceRequest;
+import spring.ai.mcp.spec.McpSchema.Resource;
+import spring.ai.mcp.spec.McpSchema.SubscribeRequest;
+import spring.ai.mcp.spec.McpSchema.UnsubscribeRequest;
+import spring.ai.mcp.spec.McpSchema.ClientCapabilities.RootCapabilities;
+
+/**
+ * The MCP client is the main entry point for interacting with the Model Context Protocol
+ * (MCP) server.
+ * 
+ * 
+ * @author Christian Tzolov
+ * @since 1.0.0
+ */
+public class McpClient extends McpSession {
+
+	public McpClient(McpTransport transport) {
+		this(transport, Duration.ofSeconds(10), new ObjectMapper());
+	}
+
+	public McpClient(McpTransport transport, Duration readTimeout, ObjectMapper objectMapper) {
+		super(transport, readTimeout, objectMapper);
+	}
+
+	/**
+	 * The initialization phase MUST be the first interaction between client and server.
+	 * During this phase, the client and server:
+	 * <ul>
+	 * <li>Establish protocol version compatibility</li>
+	 * <li>Exchange and negotiate capabilities</li>
+	 * <li>Share implementation details</li>
+	 * </ul>
+	 * <br/>
+	 * The client MUST initiate this phase by sending an initialize request containing:
+	 * <ul>
+	 * <li>The protocol version the client supports</li>
+	 * <li>The client's capabilities</li>
+	 * <li>Client implementation information</li>
+	 * </ul>
+	 *
+	 * The server MUST respond with its own capabilities and information:
+	 * {@link McpSchema.ServerCapabilities}. <br/>
+	 * After successful initialization, the client MUST send an initialized notification
+	 * to indicate it is ready to begin normal operations.
+	 *
+	 * <br/>
+	 *
+	 * <a href=
+	 * "https://github.com/modelcontextprotocol/specification/blob/main/docs/specification/basic/lifecycle.md#initialization">Initialization
+	 * Spec</a>
+	 * @return the initialize result.
+	 */
+	public InitializeResult initialize() {
+
+		InitializeRequest initializeRequest = new InitializeRequest(// @formatter:off
+				McpSchema.LATEST_PROTOCOL_VERSION,
+				new ClientCapabilities(null, new RootCapabilities(true), null),
+				new Implementation("mcp-java-client", "0.0.1")); // @formatter:on
+
+		CompletableFuture<InitializeResult> initializeResultFuture = this.sendRequest("initialize", initializeRequest,
+				new TypeReference<InitializeResult>() {
+				});
+
+		try {
+			InitializeResult initializeResult = initializeResultFuture.get();
+
+			if (initializeRequest.protocolVersion() != McpSchema.LATEST_PROTOCOL_VERSION) {
+				throw new McpError(
+						"Unsupported protocol version from the server: " + initializeRequest.protocolVersion());
+			}
+
+			this.sendNotification("notifications/initialized", null);
+
+			return initializeResult;
+		}
+		catch (Exception e) {
+			throw new McpError(e);
+		}
+	}
+
+	/**
+	 * Send a roots/list_changed notification.
+	 */
+	public void sendRootsListChanged() {
+		this.sendNotification("notifications/roots/list_changed");
+	}
+
+	/**
+	 * Send a synchronous ping request.
+	 */
+	public void ping() {
+
+		try {
+			this.sendRequest("ping", null, new TypeReference<Void>() {
+			}).get();
+		}
+		catch (Exception e) {
+			throw new McpError(e);
+		}
+	}
+
+	// --------------------------
+	// Tools
+	// --------------------------
+	/**
+	 * Send a tools/call request.
+	 * @param callToolRequest the call tool request.
+	 * @return the call tool result.
+	 */
+	public CallToolResult callTool(CallToolRequest callToolRequest) {
+		try {
+			return this.sendRequest("tools/call", callToolRequest, new TypeReference<CallToolResult>() {
+			}).get();
+		}
+		catch (Exception e) {
+			throw new McpError(e);
+		}
+	}
+
+	/**
+	 * Send a tools/list request.
+	 * @return the list of tools result.
+	 */
+	public ListToolsResult listTools(String cursor) {
+		try {
+			return this.sendRequest("tools/list", new PaginatedRequest(cursor), new TypeReference<ListToolsResult>() {
+			}).get();
+		}
+		catch (Exception e) {
+			throw new McpError(e);
+		}
+	}
+
+	// --------------------------
+	// Resources
+	// --------------------------
+
+	/**
+	 * Send a resources/list request.
+	 * @param cursor the cursor
+	 * @return the list of resources result.
+	 */
+	public ListResourcesResult listResources(String cursor) {
+		try {
+			return this
+				.sendRequest("resources/list", new PaginatedRequest(cursor), new TypeReference<ListResourcesResult>() {
+				})
+				.get();
+		}
+		catch (Exception e) {
+			throw new McpError(e);
+		}
+	}
+
+	/**
+	 * Send a resources/read request.
+	 * @param resource the resource to read
+	 * @return the resource content.
+	 */
+	public McpSchema.ReadResourceResult readResource(Resource resource) {
+		return this.readResource(new ReadResourceRequest(resource.uri()));
+	}
+
+	/**
+	 * Send a resources/read request.
+	 * @param readResourceRequest the read resource request.
+	 * @return the resource content.
+	 */
+	public McpSchema.ReadResourceResult readResource(ReadResourceRequest readResourceRequest) {
+		try {
+			return this
+				.sendRequest("resources/read", readResourceRequest, new TypeReference<McpSchema.ReadResourceResult>() {
+				})
+				.get();
+		}
+		catch (Exception e) {
+			e.printStackTrace();
+			throw new McpError(e);
+		}
+	}
+
+	/**
+	 * Resource templates allow servers to expose parameterized resources using URI
+	 * templates. Arguments may be auto-completed through the completion API.
+	 *
+	 * Request a list of resource templates the server has.
+	 * @param cursor the cursor
+	 * @return the list of resource templates result.
+	 */
+	public ListResourceTemplatesResult listResourceTemplates(String cursor) {
+		try {
+			return this.sendRequest("resources/templates/list", new PaginatedRequest(cursor),
+					new TypeReference<ListResourceTemplatesResult>() {
+					})
+				.get();
+		}
+		catch (Exception e) {
+			throw new McpError(e);
+		}
+	}
+
+	/**
+	 * List Changed Notification. When the list of available resources changes, servers
+	 * that declared the listChanged capability SHOULD send a notification:
+	 */
+	public void sendResourcesListChanged() {
+		this.sendNotification("notifications/resources/list_changed");
+	}
+
+	/**
+	 * Subscriptions. The protocol supports optional subscriptions to resource changes.
+	 * Clients can subscribe to specific resources and receive notifications when they
+	 * change.
+	 *
+	 * Send a resources/subscribe request.
+	 * @param subscribeRequest the subscribe request contains the uri of the resource to
+	 * subscribe to.
+	 */
+	public void subscribeResource(SubscribeRequest subscribeRequest) {
+		try {
+			this.sendRequest("resources/subscribe", subscribeRequest, new TypeReference<Void>() {
+			}).get();
+		}
+		catch (Exception e) {
+			throw new McpError(e);
+		}
+	}
+
+	/**
+	 * Send a resources/unsubscribe request.
+	 * @param unsubscribeRequest the unsubscribe request contains the uri of the resource
+	 * to unsubscribe from.
+	 */
+	public void unsubscribeResource(UnsubscribeRequest unsubscribeRequest) {
+		try {
+			this.sendRequest("resources/unsubscribe", unsubscribeRequest, new TypeReference<Void>() {
+			}).get();
+		}
+		catch (Exception e) {
+			throw new McpError(e);
+		}
+	}
+}

src/main/java/spring/ai/mcp/client/stdio/StdioServerParameters.java

@@ -0,0 +1,130 @@
+package spring.ai.mcp.client.stdio;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+import org.springframework.util.Assert;
+import org.springframework.util.CollectionUtils;
+
+/**
+ * Server parameters for stdio client.
+ */
+public class StdioServerParameters {
+
+	// Environment variables to inherit by default
+	private static final List<String> DEFAULT_INHERITED_ENV_VARS = System.getProperty("os.name")
+		.toLowerCase()
+		.contains("win")
+				? Arrays.asList("APPDATA", "HOMEDRIVE", "HOMEPATH", "LOCALAPPDATA", "PATH",
+						"PROCESSOR_ARCHITECTURE", "SYSTEMDRIVE", "SYSTEMROOT", "TEMP", "USERNAME", "USERPROFILE")
+				: Arrays.asList("HOME", "LOGNAME", "PATH", "SHELL", "TERM", "USER");
+
+	@JsonProperty("command")
+	private String command;
+
+	@JsonProperty("args")
+	private List<String> args = new ArrayList<>();
+
+	@JsonProperty("env")
+	private Map<String, String> env;
+
+	private StdioServerParameters(String command, List<String> args, Map<String, String> env) {
+		Assert.hasText(command, "Command must not be empty");
+		Assert.notNull(args, "Arguments must not be null");
+
+		this.command = command;
+		this.args = args;
+		this.env = new HashMap<>(getDefaultEnvironment());
+		if (!CollectionUtils.isEmpty(env)) {
+			this.env.putAll(env);
+		}
+	}
+
+	public String getCommand() {
+		return this.command;
+	}
+
+	public List<String> getArgs() {
+		return this.args;
+	}
+
+	public Map<String, String> getEnv() {
+		return this.env;
+	}
+
+	public static Builder builder(String command) {
+		return new Builder(command);
+	}
+
+	public static class Builder {
+
+		private String command;
+
+		private List<String> args = new ArrayList<>();
+
+		private Map<String, String> env = new HashMap<>();
+
+		public Builder(String command) {
+			Assert.hasText(command, "Command must not be empty");
+			this.command = command;
+		}
+
+		public Builder args(String... args) {
+			Assert.notNull(args, "Arguments must not be null");
+			this.args = Arrays.asList(args);
+			return this;
+		}
+
+		public Builder args(List<String> args) {
+			Assert.notNull(args, "Arguments must not be null");
+			this.args = new ArrayList<>(args);
+			return this;
+		}
+
+		public Builder arg(String arg) {
+			Assert.hasText(arg, "Argument must not be empty");
+			this.args.add(arg);
+			return this;
+		}
+
+		public Builder env(Map<String, String> env) {
+			if (!CollectionUtils.isEmpty(env)) {
+				this.env.putAll(env);
+			}
+			return this;
+		}
+
+		public Builder addEnvVar(String key, String value) {
+			Assert.hasText(key, "Environment variable key must not be empty");
+			Assert.notNull(value, "Environment variable value must not be null");
+			this.env.put(key, value);
+			return this;
+		}
+
+		public StdioServerParameters build() {
+			return new StdioServerParameters(command, args, env);
+		}
+
+	}
+
+	/**
+	 * Returns a default environment object including only environment variables
+	 * deemed safe to inherit.
+	 */
+	private static Map<String, String> getDefaultEnvironment() {
+		return System.getenv()
+			.entrySet()
+			.stream()
+			.filter(entry -> DEFAULT_INHERITED_ENV_VARS.contains(entry.getKey()))
+			.filter(entry -> entry.getValue() != null)
+			.filter(entry -> !entry.getValue().startsWith("()"))
+			.collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
+	}
+
+}

src/main/java/spring/ai/mcp/client/stdio/StdioServerTransport.java

@@ -0,0 +1,240 @@
+package spring.ai.mcp.client.stdio;
+
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.IOException;
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.TimeUnit;
+
+import spring.ai.mcp.spec.DefaultMcpTransport;
+import spring.ai.mcp.spec.McpSchema.JSONRPCMessage;
+import spring.ai.mcp.spec.McpSchema.JSONRPCNotification;
+import spring.ai.mcp.spec.McpSchema.JSONRPCRequest;
+import spring.ai.mcp.spec.McpSchema.JSONRPCResponse;
+
+import org.springframework.ai.model.ModelOptionsUtils;
+import org.springframework.util.Assert;
+
+/**
+ * Stdio client for communicating with a server process.
+ */
+public class StdioServerTransport extends DefaultMcpTransport {
+
+	private Process process;
+
+	private BufferedReader processErrorReader;
+
+	private BufferedReader processReader;
+
+	private BufferedWriter processWriter;
+
+	private ExecutorService executorService;
+
+	private volatile boolean isRunning;
+
+	private final StdioServerParameters params;
+
+	public StdioServerTransport(StdioServerParameters params) {
+		this(params, Duration.ofMillis(100));
+	}
+
+	public StdioServerTransport(StdioServerParameters params, Duration writeTimeout) {
+		super(writeTimeout);
+
+		Assert.notNull(params, "Server parameters must not be null");
+
+		this.params = params;
+
+		// Start threads
+		this.executorService = Executors.newFixedThreadPool(3);
+	}
+
+	@Override
+	public void start() {
+		// Prepare command and environment
+		List<String> fullCommand = new ArrayList<>();
+		fullCommand.add(params.getCommand());
+		fullCommand.addAll(params.getArgs());
+
+		ProcessBuilder processBuilder = new ProcessBuilder(fullCommand);
+		processBuilder.environment().putAll(params.getEnv());
+
+		// Start the process
+		try {
+			this.process = processBuilder.start();
+		}
+		catch (IOException e) {
+			throw new RuntimeException("Failed to start process with command: " + fullCommand, e);
+		}
+
+		// Validate process streams
+		if (this.process.getInputStream() == null || process.getOutputStream() == null) {
+			this.process.destroy();
+			throw new RuntimeException("Process input or output stream is null");
+		}
+
+		// Initialize readers and writers
+		this.processErrorReader = this.process.errorReader();
+		this.processReader = this.process.inputReader();
+		this.processWriter = this.process.outputWriter();
+
+		// Start threads
+		this.isRunning = true;
+		startReaderThread();
+		startWriterThread();
+		startErrorReaderThread();
+
+	}
+
+	public void awaitForExit() {
+		try {
+			this.process.waitFor();
+		}
+		catch (InterruptedException e) {
+			throw new RuntimeException("Process interrupted", e);
+		}
+	}
+
+	private void startErrorReaderThread() {
+
+		this.executorService.execute(() -> {
+			try {
+				String line;
+				while (isRunning && processErrorReader != null && (line = processErrorReader.readLine()) != null) {
+					try {
+						System.out.println("Received error line: " + line);
+						this.getErrorReadQueue().offer(line, 100, TimeUnit.MILLISECONDS);
+					}
+					catch (Exception e) {
+						throw new RuntimeException(e);
+					}
+				}
+			}
+			catch (IOException e) {
+				if (this.isRunning) {
+					throw new RuntimeException(e);
+				}
+			}
+			finally {
+				this.isRunning = false;
+			}
+		});
+	}
+
+	private JSONRPCMessage deserializeJsonRpcMessage(String jsonText) throws IOException {
+
+		var map = ModelOptionsUtils.jsonToMap(jsonText);
+
+		// Determine message type based on specific JSON structure
+		if (map.containsKey("method") && map.containsKey("id")) {
+			return ModelOptionsUtils.OBJECT_MAPPER.convertValue(map, JSONRPCRequest.class);
+		}
+		else if (map.containsKey("method") && !map.containsKey("id")) {
+			return ModelOptionsUtils.OBJECT_MAPPER.convertValue(map, JSONRPCNotification.class);
+		}
+		else if (map.containsKey("result") || map.containsKey("error")) {
+			return ModelOptionsUtils.OBJECT_MAPPER.convertValue(map, JSONRPCResponse.class);
+		}
+
+		throw new IllegalArgumentException("Cannot deserialize JSONRPCMessage: " + jsonText);
+	}
+
+	private void startReaderThread() {
+		this.executorService.execute(() -> {
+			try {
+				String line;
+				while (this.isRunning && this.processReader != null && (line = this.processReader.readLine()) != null) {
+					try {
+						JSONRPCMessage message = deserializeJsonRpcMessage(line);
+						this.getDataReadQueue().offer(message, 100, TimeUnit.MILLISECONDS);
+					}
+					catch (Exception e) {
+						throw new RuntimeException(e);
+					}
+				}
+			}
+			catch (IOException e) {
+				if (isRunning) {
+					throw new RuntimeException(e);
+				}
+			}
+			finally {
+				isRunning = false;
+			}
+		});
+	}
+
+	private void startWriterThread() {
+		this.executorService.execute(() -> {
+			try {
+				while (this.isRunning && this.processWriter != null && !Thread.currentThread().isInterrupted()) {
+					try {
+						JSONRPCMessage message = this.getDataWriteQueue().poll(100, TimeUnit.MILLISECONDS);
+						if (message != null) {
+							this.processWriter.write(ModelOptionsUtils.toJsonString(message));
+							this.processWriter.newLine();
+							this.processWriter.flush();
+						}
+					}
+					catch (InterruptedException e) {
+						Thread.currentThread().interrupt();
+						break;
+					}
+				}
+			}
+			catch (IOException e) {
+				throw new RuntimeException(e);
+			}
+			finally {
+				this.isRunning = false;
+			}
+		});
+	}
+
+	public void stop() {
+		
+		this.isRunning = false;
+
+		// Interrupt threads
+		this.executorService.shutdownNow();
+
+		// Destroy process
+		if (this.process != null) {
+			this.process.destroyForcibly();
+		}
+	}
+
+	public boolean isRunning() {
+		return this.isRunning;
+	}
+
+	@Override
+	public void close() {
+		stop();
+		
+		super.close(); // Do we need this?
+
+		// Close resources
+		if (this.processReader != null) {
+			try {
+				this.processReader.close();
+			}
+			catch (IOException e) {
+				e.printStackTrace();
+			}
+		}
+		if (this.processWriter != null) {
+			try {
+				this.processWriter.close();
+			}
+			catch (IOException e) {
+				e.printStackTrace();
+			}
+		}
+	}
+
+}

src/main/java/spring/ai/mcp/client/util/McpServerParameterParser.java

@@ -0,0 +1,87 @@
+/*
+* Copyright 2024 - 2024 the original author or authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+package spring.ai.mcp.client.util;
+
+import java.util.Map;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import spring.ai.mcp.client.util.McpServerParameterParser.McpServers.McpServer;
+
+/**
+ * @author Christian Tzolov
+ * @since 1.0.0
+ */
+
+public class McpServerParameterParser {
+
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record McpServers(// @formatter:off
+		@JsonProperty("mcpServers") Map<String, McpServer> mcpServers) {
+
+		@JsonInclude(JsonInclude.Include.NON_ABSENT)
+		public record McpServer(
+			@JsonProperty("command") String command,
+			@JsonProperty("args") String[] args,
+			@JsonProperty("env") Map<String, String> env) {
+		}
+	} // @formatter:on
+
+	public static void main(String[] args) throws Exception {
+		ObjectMapper objectMapper = new ObjectMapper();
+
+		// Assuming the JSON is in a file named "servers.json"
+		String jsonInput = """
+				{
+				  "mcpServers": {
+				    "filesystem": {
+				      "command": "npx",
+				      "args": ["-y", "@modelcontextprotocol/server-filesystem", "/path/to/allowed/files"]
+				    },
+				    "git": {
+				      "command": "uvx",
+				      "args": ["mcp-server-git", "--repository", "path/to/git/repo"]
+				    },
+				    "github": {
+				      "command": "npx",
+				      "args": ["-y", "@modelcontextprotocol/server-github"],
+				      "env": {
+				        "GITHUB_PERSONAL_ACCESS_TOKEN": "<YOUR_TOKEN>"
+				      }
+				    },
+				    "postgres": {
+				      "command": "npx",
+				      "args": ["-y", "@modelcontextprotocol/server-postgres", "postgresql://localhost/mydb"]
+				    }
+				  }
+				}
+								""";
+
+		// Deserialize JSON into McpServers
+		McpServers servers = objectMapper.readValue(jsonInput, McpServers.class);
+
+		// Access individual servers
+		for (Map.Entry<String, McpServer> entry : servers.mcpServers().entrySet()) {
+			System.out.println("Key: " + entry.getKey());
+			System.out.println("Command: " + entry.getValue().command());
+			System.out.println("Arguments: " + String.join(", ", entry.getValue().args()));
+			System.out.println("Environment Variables: " + entry.getValue().env());
+			System.out.println("-----------");
+		}
+	}
+
+}

src/main/java/spring/ai/mcp/spec/DefaultMcpTransport.java

@@ -0,0 +1,131 @@
+/*
+* Copyright 2024 - 2024 the original author or authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+package spring.ai.mcp.spec;
+
+import java.time.Duration;
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.TimeUnit;
+import java.util.function.Consumer;
+
+import spring.ai.mcp.spec.McpSchema.JSONRPCMessage;
+
+/**
+ * @author Christian Tzolov
+ * @since 1.0.0
+ */
+public class DefaultMcpTransport implements McpTransport {
+
+	private final BlockingQueue<String> errorReadQueue;
+
+	private final BlockingQueue<JSONRPCMessage> dataReadQueue;
+
+	private final BlockingQueue<JSONRPCMessage> dataWriteQueue;
+
+	private final ExecutorService executorService;
+
+	private final Duration writeTimeout;
+
+	private Consumer<JSONRPCMessage> messageReader = message -> System.out.println("Received message: " + message);
+
+	private Consumer<String> errorReader = error -> System.err.println("Received error: " + error);
+
+	public DefaultMcpTransport(Duration readTimeout) {
+
+		this.errorReadQueue = new LinkedBlockingQueue<>();
+		this.dataReadQueue = new LinkedBlockingQueue<>();
+		this.dataWriteQueue = new LinkedBlockingQueue<>();
+        this.writeTimeout = readTimeout;
+
+		this.executorService = Executors.newFixedThreadPool(2);
+		this.handleIncomingMessages();
+	}
+
+	private void handleIncomingMessages() {
+		this.executorService.execute(() -> {
+			while (!Thread.currentThread().isInterrupted()) {
+				try {
+					JSONRPCMessage message = this.dataReadQueue.take();
+					this.messageReader.accept(message);
+				}
+				catch (InterruptedException e) {
+					Thread.currentThread().interrupt();
+				}
+			}
+		});
+	}
+
+	private void handleIncomingErrors() {
+		this.executorService.execute(() -> {
+			while (!Thread.currentThread().isInterrupted()) {
+				try {
+					String error = this.errorReadQueue.take();
+					this.errorReader.accept(error);
+					System.err.println(error);
+				}
+				catch (InterruptedException e) {
+					Thread.currentThread().interrupt();
+				}
+			}
+		});
+	}
+
+	protected BlockingQueue<JSONRPCMessage> getDataReadQueue() {
+		return dataReadQueue;
+	}
+
+	protected BlockingQueue<JSONRPCMessage> getDataWriteQueue() {
+		return dataWriteQueue;
+	}
+
+	protected BlockingQueue<String> getErrorReadQueue() {
+		return errorReadQueue;
+	}
+
+	public void setMessageHandler(Consumer<JSONRPCMessage> messageReader) {
+		this.messageReader = messageReader;
+	}
+
+	public void setErrorHandler(Consumer<String> errorReader) {
+		this.errorReader = errorReader;
+	}
+
+	// Start processing incoming messages
+	public void start() {
+		this.handleIncomingErrors();
+		this.handleIncomingMessages();
+	}
+
+	// Close the transport
+	@Override
+	public void close() {
+		// this.onClose();
+		this.executorService.shutdownNow();
+	}
+
+	public void sendMessage(JSONRPCMessage message) {
+		// Use offer with timeout to prevent blocking indefinitely
+		try {			
+			if (!this.dataWriteQueue.offer(message, writeTimeout.toMillis(), TimeUnit.MILLISECONDS)) {
+				throw new RuntimeException("Failed to enqueue message");
+			}
+		} catch (InterruptedException e) {
+			throw new RuntimeException(e);
+		}
+	}
+}

src/main/java/spring/ai/mcp/spec/McpSchema.java

@@ -0,0 +1,522 @@
+/*
+* Copyright 2024 - 2024 the original author or authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+package spring.ai.mcp.spec;
+
+import java.util.List;
+import java.util.Map;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonTypeInfo.As;
+
+/**
+ * Based on the <a href="http://www.jsonrpc.org/specification">JSON-RPC 2.0
+ * specification<a/> and the <a href=
+ * "https://github.com/modelcontextprotocol/specification/blob/main/schema/schema.ts">Model
+ * Context Protocol Schema</a>.
+ *
+ * @author Christian Tzolov
+ * @since 1.0.0
+ */
+public class McpSchema {
+
+	public static final String LATEST_PROTOCOL_VERSION = "2024-11-05";
+
+	public static final String JSONRPC_VERSION = "2.0";
+
+	// ---------------------------
+	// JSON-RPC Error Codes
+	// ---------------------------
+	public final class ErrorCodes {
+
+		public static final int PARSE_ERROR = -32700;
+
+		public static final int INVALID_REQUEST = -32600;
+
+		public static final int METHOD_NOT_FOUND = -32601;
+
+		public static final int INVALID_PARAMS = -32602;
+
+		public static final int INTERNAL_ERROR = -32603;
+
+	}
+
+	public sealed interface Request permits InitializeRequest, CallToolRequest, CreateMessageRequest, CompleteRequest {
+
+	}
+
+	// ---------------------------
+	// JSON-RPC Message Types
+	// ---------------------------
+	public sealed interface JSONRPCMessage permits JSONRPCRequest, JSONRPCNotification, JSONRPCResponse {
+
+		String jsonrpc();
+
+	}
+
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record JSONRPCRequest( // @formatter:off
+			@JsonProperty("jsonrpc") String jsonrpc,
+			@JsonProperty("method") String method,
+			@JsonProperty("id") Object id,
+			@JsonProperty("params") Object params) implements JSONRPCMessage {
+	} // @formatter:on
+
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record JSONRPCNotification( // @formatter:off
+			@JsonProperty("jsonrpc") String jsonrpc,
+			@JsonProperty("method") String method,
+			@JsonProperty("params") Map<String, Object> params) implements JSONRPCMessage {
+	} // @formatter:on
+
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record JSONRPCResponse( // @formatter:off
+			@JsonProperty("jsonrpc") String jsonrpc,
+			@JsonProperty("id") Object id,
+			@JsonProperty("result") Object result,
+			@JsonProperty("error") JSONRPCError error) implements JSONRPCMessage {
+
+		@JsonInclude(JsonInclude.Include.NON_ABSENT)
+		public record JSONRPCError(
+			@JsonProperty("code") int code,
+			@JsonProperty("message") String message,
+			@JsonProperty("data") Object data) {
+		}
+	}// @formatter:on
+
+	// ---------------------------
+	// Initialization
+	// ---------------------------
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record InitializeRequest( // @formatter:off
+		@JsonProperty("protocolVersion") String protocolVersion,
+		@JsonProperty("capabilities") ClientCapabilities capabilities,
+		@JsonProperty("clientInfo") Implementation clientInfo) implements Request {		
+	} // @formatter:on
+
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record InitializeResult( // @formatter:off
+		@JsonProperty("protocolVersion") String protocolVersion,
+		@JsonProperty("capabilities") ServerCapabilities capabilities,
+		@JsonProperty("serverInfo") Implementation serverInfo,
+		@JsonProperty("instructions") String instructions) {
+	} // @formatter:on
+
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record ClientCapabilities( // @formatter:off
+		@JsonProperty("experimental") Map<String, Object> experimental,
+		@JsonProperty("roots") RootCapabilities roots,
+		@JsonProperty("sampling") Object sampling) {
+
+		@JsonInclude(JsonInclude.Include.NON_ABSENT)			
+		public record RootCapabilities(
+			@JsonProperty("listChanged") Boolean listChanged) {
+		}
+	}// @formatter:on
+
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record ServerCapabilities( // @formatter:off
+		@JsonProperty("experimental") Map<String, Object> experimental,
+		@JsonProperty("logging") Object logging,
+		@JsonProperty("prompts") PromptCapabilities prompts,
+		@JsonProperty("resources") ResourceCapabilities resources,
+		@JsonProperty("tools") ToolCapabilities tools) {
+		
+		@JsonInclude(JsonInclude.Include.NON_ABSENT)
+		public record PromptCapabilities(
+			@JsonProperty("listChanged") Boolean listChanged) {
+		}
+
+		@JsonInclude(JsonInclude.Include.NON_ABSENT)
+		public record ResourceCapabilities(
+			@JsonProperty("subscribe") Boolean subscribe,
+			@JsonProperty("listChanged") Boolean listChanged) {
+		}
+
+		@JsonInclude(JsonInclude.Include.NON_ABSENT)
+		public record ToolCapabilities(
+			@JsonProperty("listChanged") Boolean listChanged) {
+		}
+	} // @formatter:on
+
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record Implementation(// @formatter:off
+		@JsonProperty("name") String name,
+		@JsonProperty("version") String version) {
+	} // @formatter:on
+
+	// Existing Enums and Base Types (from previous implementation)
+	public enum Role {
+
+		USER, ASSISTANT
+
+	}
+
+	public enum LoggingLevel {
+
+		DEBUG, INFO, NOTICE, WARNING, ERROR, CRITICAL, ALERT, EMERGENCY
+
+	}
+
+	// ---------------------------
+	// Resource Interfaces
+	// ---------------------------
+	/**
+	 * Base for objects that include optional annotations for the client. The client can
+	 * use annotations to inform how objects are used or displayed
+	 */
+	public interface Annotated {
+
+		Annotations annotations();
+
+	}
+
+	/**
+	 * @param audience Describes who the intended customer of this object or data is. It
+	 * can include multiple entries to indicate content useful for multiple audiences
+	 * (e.g., `["user", "assistant"]`).
+	 * @param priority Describes how important this data is for operating the server. A
+	 * value of 1 means "most important," and indicates that the data is effectively
+	 * required, while 0 means "least important," and indicates that the data is entirely
+	 * optional. It is a number between 0 and 1.
+	 */
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record Annotations( // @formatter:off
+		@JsonProperty("audience") List<Role> audience,
+		@JsonProperty("priority") Double priority) {
+	} // @formatter:on
+
+	/**
+	 * A known resource that the server is capable of reading.
+	 *
+	 * @param uri the URI of the resource.
+	 * @param name A human-readable name for this resource. This can be used by clients to
+	 * populate UI elements.
+	 * @param description A description of what this resource represents. This can be used
+	 * by clients to improve the LLM's understanding of available resources. It can be
+	 * thought of like a "hint" to the model.
+	 * @param mimeType The MIME type of this resource, if known.
+	 */
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record Resource( // @formatter:off
+		@JsonProperty("uri") String uri,
+		@JsonProperty("name") String name,
+		@JsonProperty("description") String description,
+		@JsonProperty("mimeType") String mimeType,
+		@JsonProperty("annotations") Annotations annotations) implements Annotated {
+	} // @formatter:on
+
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record ResourceTemplate( // @formatter:off
+		@JsonProperty("uriTemplate") String uriTemplate,
+		@JsonProperty("name") String name,
+		@JsonProperty("description") String description,
+		@JsonProperty("mimeType") String mimeType,
+		@JsonProperty("annotations") Annotations annotations) implements Annotated {
+	} // @formatter:on
+
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record ListResourcesResult( // @formatter:off
+		@JsonProperty("resources") List<Resource> resources,
+		@JsonProperty("nextCursor") String nextCursor) {
+	} // @formatter:on
+
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record ListResourceTemplatesResult( // @formatter:off
+		@JsonProperty("resourceTemplates") List<ResourceTemplate> resourceTemplates,
+		@JsonProperty("nextCursor") String nextCursor) {
+	} // @formatter:on
+
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record ReadResourceRequest( // @formatter:off
+		@JsonProperty("uri") String uri){
+	} // @formatter:on
+
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record ReadResourceResult( // @formatter:off
+		@JsonProperty("contents") List<ResourceContents> contents){
+	} // @formatter:on
+
+	/**
+	 * Sent from the client to request resources/updated notifications from the server
+	 * whenever a particular resource changes.
+	 *
+	 * @param uri the URI of the resource to subscribe to. The URI can use any protocol;
+	 * it is up to the server how to interpret it.
+	 */
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record SubscribeRequest( // @formatter:off
+		@JsonProperty("uri") String uri){
+	} // @formatter:on
+
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record UnsubscribeRequest( // @formatter:off
+		@JsonProperty("uri") String uri){
+	} // @formatter:on
+
+	/**
+	 * The contents of a specific resource or sub-resource.
+	 */
+	@JsonTypeInfo(use = JsonTypeInfo.Id.DEDUCTION, include = As.PROPERTY)
+	@JsonSubTypes({ @JsonSubTypes.Type(value = TextResourceContents.class, name = "text"),
+			@JsonSubTypes.Type(value = BlobResourceContents.class, name = "blob") })
+	public sealed interface ResourceContents permits TextResourceContents, BlobResourceContents {
+
+		/**
+		 * The URI of this resource.
+		 * @return the URI of this resource.
+		 */
+		String uri();
+
+		/**
+		 * The MIME type of this resource.
+		 * @return the MIME type of this resource.
+		 */
+		String mimeType();
+
+	}
+
+	/**
+	 * Text contents of a resource.
+	 *
+	 * @param uri the URI of this resource.
+	 * @param mimeType the MIME type of this resource.
+	 * @param text the text of the resource. This must only be set if the resource can
+	 * actually be represented as text (not binary data).
+	 */
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record TextResourceContents( // @formatter:off
+		@JsonProperty("uri") String uri,
+		@JsonProperty("mimeType") String mimeType,
+		@JsonProperty("text") String text) implements ResourceContents {
+	} // @formatter:on
+
+	/**
+	 * Binary contents of a resource.
+	 *
+	 * @param uri the URI of this resource.
+	 * @param mimeType the MIME type of this resource.
+	 * @param blob a base64-encoded string representing the binary data of the resource.
+	 * This must only be set if the resource can actually be represented as binary data
+	 * (not text).
+	 */
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record BlobResourceContents( // @formatter:off
+		@JsonProperty("uri") String uri,
+		@JsonProperty("mimeType") String mimeType,
+		@JsonProperty("blob") String blob) implements ResourceContents {
+	} // @formatter:on
+
+	// ---------------------------
+	// Prompt Interfaces
+	// ---------------------------
+	public record Prompt(String name, String description, List<PromptArgument> arguments) {
+	}
+
+	public record PromptArgument(String name, String description, Boolean required) {
+	}
+
+	public record PromptMessage(Role role, Content content) {
+	}
+
+	// ---------------------------
+	// Tool Interfaces
+	// ---------------------------
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record ListToolsResult( // @formatter:off
+		@JsonProperty("tools") List<Tool> tools,
+		@JsonProperty("nextCursor") String nextCursor) {
+	}// @formatter:on
+
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record Tool( // @formatter:off
+		@JsonProperty("name") String name,
+		@JsonProperty("description") String description,
+		@JsonProperty("inputSchema") Map<String, Object> inputSchema) {
+	} // @formatter:on
+
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record CallToolRequest(// @formatter:off
+		@JsonProperty("name") String name,
+		@JsonProperty("arguments") Map<String, Object> arguments) implements Request {
+	}// @formatter:off
+
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record CallToolResult( // @formatter:off
+		@JsonProperty("content") List<Content> content,
+		@JsonProperty("isError") Boolean isError) {
+	} // @formatter:on
+
+	// ---------------------------
+	// Sampling Interfaces
+	// ---------------------------
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record SamplingMessage(// @formatter:off
+		@JsonProperty("role") Role role,
+		@JsonProperty("content") Content content) {
+	} // @formatter:on
+
+	// Sampling and Message Creation
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record CreateMessageRequest(List<SamplingMessage> messages, ModelPreferences modelPreferences,
+			String systemPrompt, ContextInclusionStrategy includeContext, Double temperature, int maxTokens,
+			List<String> stopSequences, Map<String, Object> metadata) implements Request {
+
+		public enum ContextInclusionStrategy {
+
+			NONE, THIS_SERVER, ALL_SERVERS
+
+		}
+	}
+
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record CreateMessageResult(Role role, Content content, String model, StopReason stopReason) {
+		public enum StopReason {
+
+			END_TURN, STOP_SEQUENCE, MAX_TOKENS
+
+		}
+	}
+
+	// ---------------------------
+	// Model Preferences
+	// ---------------------------
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record ModelPreferences(List<ModelHint> hints, Double costPriority, Double speedPriority,
+			Double intelligencePriority) {
+	}
+
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record ModelHint(String name) {
+	}
+
+	// ---------------------------
+	// Pagination Interfaces
+	// ---------------------------
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record PaginatedRequest(@JsonProperty("cursor") String cursor) {
+	}
+
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record PaginatedResult(@JsonProperty("nextCursor") String nextCursor) {
+	}
+
+	// ---------------------------
+	// Progress and Logging
+	// ---------------------------
+	public record ProgressNotification(String progressToken, double progress, Double total) {
+	}
+
+	public record LoggingMessageNotification(LoggingLevel level, String logger, Object data) {
+	}
+
+	// ---------------------------
+	// Autocomplete
+	// ---------------------------
+	public record CompleteRequest(PromptOrResourceReference ref, CompleteArgument argument) implements Request {
+		public sealed interface PromptOrResourceReference permits PromptReference, ResourceReference {
+
+			String type();
+
+		}
+
+		public record PromptReference(String type, String name) implements PromptOrResourceReference {
+		}
+
+		public record ResourceReference(String type, String uri) implements PromptOrResourceReference {
+		}
+
+		public record CompleteArgument(String name, String value) {
+		}
+	}
+
+	public record CompleteResult(CompleteCompletion completion) {
+		public record CompleteCompletion(List<String> values, Integer total, Boolean hasMore) {
+		}
+	}
+
+	// ---------------------------
+	// Content Types
+	// ---------------------------
+	@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "type")
+	@JsonSubTypes({ @JsonSubTypes.Type(value = TextContent.class, name = "text"),
+			@JsonSubTypes.Type(value = ImageContent.class, name = "image"),
+			@JsonSubTypes.Type(value = EmbeddedResource.class, name = "resource") })
+	public sealed interface Content permits TextContent, ImageContent, EmbeddedResource {
+
+		String type();
+
+	}
+
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record TextContent( // @formatter:off
+		@JsonProperty("audience") List<Role> audience,
+		@JsonProperty("priority") Double priority,
+		@JsonProperty("type") String type,
+		@JsonProperty("text") String text) implements Content { // @formatter:on
+
+		public TextContent {
+			type = "text";
+		}
+
+		public String type() {
+			return type;
+		}
+	}
+
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record ImageContent( // @formatter:off
+		@JsonProperty("audience") List<Role> audience,
+		@JsonProperty("priority") Double priority,
+		@JsonProperty("type") String type,
+		@JsonProperty("data") String data,
+		@JsonProperty("mimeType") String mimeType) implements Content { // @formatter:on
+
+		public ImageContent {
+			type = "image";
+		}
+
+		public String type() {
+			return type;
+		}
+	}
+
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record EmbeddedResource( // @formatter:off
+		@JsonProperty("audience") List<Role> audience,
+		@JsonProperty("priority") Double priority,
+		@JsonProperty("type") String type,
+		@JsonProperty("resource") ResourceContents resource) implements Content { // @formatter:on
+
+		public EmbeddedResource {
+			type = "resource";
+		}
+
+		public String type() {
+			return type;
+		}
+	}
+
+	// Roots
+	@JsonInclude(JsonInclude.Include.NON_ABSENT)
+	public record Root( // @formatter:off
+		@JsonProperty("uri") String uri,
+		@JsonProperty("name") String name) {
+	} // @formatter:on
+
+}

src/main/java/spring/ai/mcp/spec/McpSession.java

@@ -0,0 +1,160 @@
+/*
+* Copyright 2024 - 2024 the original author or authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* https://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+package spring.ai.mcp.spec;
+
+import java.time.Duration;
+import java.util.Map;
+import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.TimeUnit;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import spring.ai.mcp.spec.McpSchema.JSONRPCNotification;
+import spring.ai.mcp.spec.McpSchema.JSONRPCRequest;
+import spring.ai.mcp.spec.McpSchema.JSONRPCResponse;
+
+import org.springframework.util.Assert;
+
+public class McpSession implements AutoCloseable {
+
+	final ConcurrentHashMap<Object, CompletableFuture<JSONRPCResponse>> waitingForResponseStreams;
+
+	private final Duration readTimeout;
+
+	private final ObjectMapper objectMapper;
+
+	private final McpTransport transport;
+
+	public McpSession(McpTransport transport, Duration readTimeout, ObjectMapper objectMapper) {
+
+		Assert.notNull(transport, "Transport must not be null");
+		Assert.notNull(readTimeout, "Read timeout must not be null");
+		Assert.notNull(objectMapper, "Object mapper must not be null");
+
+		this.waitingForResponseStreams = new ConcurrentHashMap<>();
+
+		this.readTimeout = readTimeout;
+		this.objectMapper = objectMapper;
+
+		this.transport = transport;
+
+		this.transport.setMessageHandler(message -> {
+			if (message instanceof JSONRPCResponse jsonRpcResponse) {
+				CompletableFuture<JSONRPCResponse> responseFuture = this.waitingForResponseStreams
+					.remove(jsonRpcResponse.id());
+				if (responseFuture != null) {
+					responseFuture.complete(jsonRpcResponse);
+				}
+			}
+			else if (message instanceof JSONRPCRequest jsonRpcRequest) {
+				handleRequest(new RequestResponder<>(jsonRpcRequest.id(), jsonRpcRequest));
+			}
+			else if (message instanceof JSONRPCNotification jsonRpcNotification) {
+				handleNotification(jsonRpcNotification);
+			}
+		});
+
+		this.transport.setErrorHandler(error -> {
+			System.out.println("Received error: " + error);
+		});
+
+		this.transport.start();
+	}
+
+	public <T> CompletableFuture<T> sendRequest(String method, Object requestParams, TypeReference<T> typeRef) {
+
+		String requestId = UUID.randomUUID().toString();
+		CompletableFuture<JSONRPCResponse> responseFuture = new CompletableFuture<>();
+		this.waitingForResponseStreams.put(requestId, responseFuture);
+
+		JSONRPCRequest jsonrpcRequest = new JSONRPCRequest(McpSchema.JSONRPC_VERSION, method, requestId, requestParams);
+
+		try {
+			this.transport.sendMessage(jsonrpcRequest);
+		}
+		catch (Exception e) {
+			return CompletableFuture.failedFuture(new McpError(e));
+		}
+
+		return responseFuture.orTimeout(this.readTimeout.toMillis(), TimeUnit.MILLISECONDS)
+			.thenApply(jsonRpcResponse -> {
+				if (jsonRpcResponse.error() != null) {
+					throw new McpError(jsonRpcResponse.error());
+				}
+
+				return this.objectMapper.convertValue(jsonRpcResponse.result(), typeRef);
+			});
+	}
+
+	public CompletableFuture<Void> sendNotification(String method) {
+		return sendNotification(method, null);
+	}
+
+	public CompletableFuture<Void> sendNotification(String method, Map<String, Object> params) {
+		JSONRPCNotification jsonrpcNotification = new JSONRPCNotification(McpSchema.JSONRPC_VERSION, method, params);
+		try {
+			this.transport.sendMessage(jsonrpcNotification);
+		}
+		catch (Exception e) {
+			return CompletableFuture.failedFuture(new McpError(e));
+		}
+		return CompletableFuture.completedFuture(null);
+	}
+
+	protected void handleRequest(RequestResponder<JSONRPCRequest> responder) {
+		// Override to handle requests
+		System.out.println("Handling request: " + responder);
+	}
+
+	protected void handleNotification(JSONRPCNotification notification) {
+		// Override to handle notifications
+		System.out.println("Handling notification: " + notification);
+	}
+
+	@Override
+	public void close() {
+		this.transport.close();
+	}
+
+	public static class RequestResponder<R> {
+
+		private final Object requestId;
+
+		private final R request;
+
+		public RequestResponder(Object requestId, R request) {
+			this.requestId = requestId;
+			this.request = request;
+		}
+
+		public CompletableFuture<Void> respond(Object response) {
+			// Send response
+			return CompletableFuture.completedFuture(null);
+		}
+
+	}
+
+	public static class McpError extends RuntimeException {
+
+		public McpError(Object error) {
+			super(error.toString());
+		}
+
+	}
+
+}

src/main/java/spring/ai/mcp/spec/McpTransport.java

@@ -0,0 +1,38 @@
+/* 
+* Copyright 2024 - 2024 the original author or authors.
+* 
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+* 
+* https://www.apache.org/licenses/LICENSE-2.0
+* 
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/ 
+package spring.ai.mcp.spec;
+
+import java.util.function.Consumer;
+
+import spring.ai.mcp.spec.McpSchema.JSONRPCMessage;
+
+/**
+ * @author Christian Tzolov
+ * @since 1.0.0
+ */
+
+public interface McpTransport extends AutoCloseable{
+    
+    void start();
+
+	void close();
+
+    void setMessageHandler(Consumer<JSONRPCMessage> messageReader);
+
+	void setErrorHandler(Consumer<String> errorReader);
+
+	void sendMessage(JSONRPCMessage message);    
+}

src/main/resources/application.properties

@@ -0,0 +1,4 @@
+spring.application.name=mcp
+spring.main.web-application-type=none
+
+spring.ai.openai.api-key=${OPENAI_API_KEY}