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feat: add server/client metadata getters to MCP clients

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Add getter methods to expose server and client capabilities and implementation
info in McpAsyncClient and McpSyncClient. Store server metadata received during
initialization for later access.
This commit is contained in:
Christian Tzolov 2025-01-01 14:00:37 +01:00
commit 0b0d5086ce
2 changed files with 83 additions and 5 deletions
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55
mcp/src/main/java/org/springframework/ai/mcp/client/McpAsyncClient.java
View file

@ -77,6 +77,21 @@ public class McpAsyncClient {
*/
private final McpSchema.ClientCapabilities clientCapabilities;
/**
* Client implementation information.
*/
private final McpSchema.Implementation clientInfo;
/**
* Server capabilities.
*/
private McpSchema.ServerCapabilities serverCapabilities;
/**
* Server implementation information.
*/
private McpSchema.Implementation serverInfo;
/**
* Roots define the boundaries of where servers can operate within the filesystem,
* allowing them to understand which directories and files they have access to.
@ -100,11 +115,6 @@ public class McpAsyncClient {
*/
private final McpTransport transport;
/**
* Client implementation information.
*/
private Implementation clientInfo;
/**
* Create a new McpAsyncClient with the given transport and session request-response
* timeout.
@ -241,6 +251,9 @@ public class McpAsyncClient {
return result.flatMap(initializeResult -> {
this.serverCapabilities = initializeResult.capabilities();
this.serverInfo = initializeResult.serverInfo();
logger.info("Server response with Protocol: {}, Capabilities: {}, Info: {} and Instructions {}",
initializeResult.protocolVersion(), initializeResult.capabilities(), initializeResult.serverInfo(),
initializeResult.instructions());
@ -256,6 +269,38 @@ public class McpAsyncClient {
});
}
/**
* Get the server capabilities that define the supported features and functionality.
* @return The server capabilities
*/
public McpSchema.ServerCapabilities getServerCapabilities() {
return this.serverCapabilities;
}
/**
* Get the server implementation information.
* @return The server implementation details
*/
public McpSchema.Implementation getServerInfo() {
return this.serverInfo;
}
/**
* Get the client capabilities that define the supported features and functionality.
* @return The client capabilities
*/
public ClientCapabilities getClientCapabilities() {
return this.clientCapabilities;
}
/**
* Get the client implementation information.
* @return The client implementation details
*/
public McpSchema.Implementation getClientInfo() {
return this.clientInfo;
}
/**
* Closes the client connection immediately.
*/

33
mcp/src/main/java/org/springframework/ai/mcp/client/McpSyncClient.java
View file

@ -22,6 +22,7 @@ import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.ai.mcp.spec.McpSchema;
import org.springframework.ai.mcp.spec.McpSchema.ClientCapabilities;
import org.springframework.ai.mcp.spec.McpSchema.GetPromptRequest;
import org.springframework.ai.mcp.spec.McpSchema.GetPromptResult;
import org.springframework.ai.mcp.spec.McpSchema.ListPromptsResult;
@ -49,6 +50,38 @@ public class McpSyncClient implements AutoCloseable {
this.delegate = delegate;
}
/**
* Get the server capabilities that define the supported features and functionality.
* @return The server capabilities
*/
public McpSchema.ServerCapabilities getServerCapabilities() {
return this.delegate.getServerCapabilities();
}
/**
* Get the server implementation information.
* @return The server implementation details
*/
public McpSchema.Implementation getServerInfo() {
return this.delegate.getServerInfo();
}
/**
* Get the client capabilities that define the supported features and functionality.
* @return The client capabilities
*/
public ClientCapabilities getClientCapabilities() {
return this.delegate.getClientCapabilities();
}
/**
* Get the client implementation information.
* @return The client implementation details
*/
public McpSchema.Implementation getClientInfo() {
return this.delegate.getClientInfo();
}
@Override
public void close() {
this.delegate.close();