100d1a1ab3
Since the example files are not executable binaries, this PR removes the shebangs. This ensures that all examples are consistently executed via `ruby` command. It also removes the executable permission from `examples/stdio_server.rb` using `chmod 444`, bringing it in line with the other example files.
94 lines
2 KiB
Ruby
94 lines
2 KiB
Ruby
# frozen_string_literal: true
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$LOAD_PATH.unshift(File.expand_path("../lib", __dir__))
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require "mcp"
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require "mcp/server/transports/stdio_transport"
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# Create a simple tool
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class ExampleTool < MCP::Tool
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description "A simple example tool that adds two numbers"
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input_schema(
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properties: {
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a: { type: "number" },
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b: { type: "number" },
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},
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required: ["a", "b"],
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)
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class << self
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def call(a:, b:)
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MCP::Tool::Response.new([{
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type: "text",
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text: "The sum of #{a} and #{b} is #{a + b}",
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}])
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end
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end
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end
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# Create a simple prompt
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class ExamplePrompt < MCP::Prompt
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description "A simple example prompt that echoes back its arguments"
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arguments [
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MCP::Prompt::Argument.new(
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name: "message",
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description: "The message to echo back",
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required: true,
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),
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]
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class << self
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def template(args, server_context:)
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MCP::Prompt::Result.new(
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messages: [
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MCP::Prompt::Message.new(
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role: "user",
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content: MCP::Content::Text.new(args[:message]),
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),
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],
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)
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end
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end
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end
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# Set up the server
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server = MCP::Server.new(
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name: "example_server",
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version: "1.0.0",
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tools: [ExampleTool],
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prompts: [ExamplePrompt],
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resources: [
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MCP::Resource.new(
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uri: "test_resource",
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name: "Test resource",
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description: "Test resource that echoes back the uri as its content",
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mime_type: "text/plain",
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),
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],
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)
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server.define_tool(
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name: "echo",
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description: "A simple example tool that echoes back its arguments",
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input_schema: { properties: { message: { type: "string" } }, required: ["message"] },
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) do |message:|
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MCP::Tool::Response.new(
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[
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{
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type: "text",
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text: "Hello from echo tool! Message: #{message}",
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},
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],
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)
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end
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server.resources_read_handler do |params|
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[{
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uri: params[:uri],
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mimeType: "text/plain",
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text: "Hello, world!",
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}]
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end
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# Create and start the transport
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transport = MCP::Server::Transports::StdioTransport.new(server)
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transport.open
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