base on The official Go SDK for Model Context Protocol servers and clients. Maintained in collaboration with Google. <!-- Autogenerated by weave; DO NOT EDIT --> # MCP Go SDK v0.5.0 [](https://codespaces.new/modelcontextprotocol/go-sdk) ***BREAKING CHANGES*** This version contains breaking changes. See the [release notes]( https://github.com/modelcontextprotocol/go-sdk/releases/tag/v0.5.0) for details. [](https://pkg.go.dev/github.com/modelcontextprotocol/go-sdk) This repository contains an unreleased implementation of the official Go software development kit (SDK) for the Model Context Protocol (MCP). > [!WARNING] > The SDK is not yet at v1.0.0 and may still be subject to incompatible API > changes. We aim to tag v1.0.0 in September, 2025. See > https://github.com/modelcontextprotocol/go-sdk/issues/328 for details. ## Package documentation The SDK consists of several importable packages: - The [`github.com/modelcontextprotocol/go-sdk/mcp`](https://pkg.go.dev/github.com/modelcontextprotocol/go-sdk/mcp) package defines the primary APIs for constructing and using MCP clients and servers. - The [`github.com/modelcontextprotocol/go-sdk/jsonrpc`](https://pkg.go.dev/github.com/modelcontextprotocol/go-sdk/jsonrpc) package is for users implementing their own transports. - The [`github.com/modelcontextprotocol/go-sdk/auth`](https://pkg.go.dev/github.com/modelcontextprotocol/go-sdk/auth) package provides some primitives for supporting oauth. - The [`github.com/modelcontextprotocol/go-sdk/oauthex`](https://pkg.go.dev/github.com/modelcontextprotocol/go-sdk/oauthex) package provides extensions to the OAuth protocol, such as ProtectedResourceMetadata. ## Getting started To get started creating an MCP server, create an `mcp.Server` instance, add features to it, and then run it over an `mcp.Transport`. For example, this server adds a single simple tool, and then connects it to clients over stdin/stdout: ```go package main import ( "context" "log" "github.com/modelcontextprotocol/go-sdk/mcp" ) type Input struct { Name string `json:"name" jsonschema:"the name of the person to greet"` } type Output struct { Greeting string `json:"greeting" jsonschema:"the greeting to tell to the user"` } func SayHi(ctx context.Context, req *mcp.CallToolRequest, input Input) (*mcp.CallToolResult, Output, error) { return nil, Output{Greeting: "Hi " + input.Name}, nil } func main() { // Create a server with a single tool. server := mcp.NewServer(&mcp.Implementation{Name: "greeter", Version: "v1.0.0"}, nil) mcp.AddTool(server, &mcp.Tool{Name: "greet", Description: "say hi"}, SayHi) // Run the server over stdin/stdout, until the client disconnects if err := server.Run(context.Background(), &mcp.StdioTransport{}); err != nil { log.Fatal(err) } } ``` To communicate with that server, we can similarly create an `mcp.Client` and connect it to the corresponding server, by running the server command and communicating over its stdin/stdout: ```go package main import ( "context" "log" "os/exec" "github.com/modelcontextprotocol/go-sdk/mcp" ) func main() { ctx := context.Background() // Create a new client, with no features. client := mcp.NewClient(&mcp.Implementation{Name: "mcp-client", Version: "v1.0.0"}, nil) // Connect to a server over stdin/stdout transport := &mcp.CommandTransport{Command: exec.Command("myserver")} session, err := client.Connect(ctx, transport, nil) if err != nil { log.Fatal(err) } defer session.Close() // Call a tool on the server. params := &mcp.CallToolParams{ Name: "greet", Arguments: map[string]any{"name": "you"}, } res, err := session.CallTool(ctx, params) if err != nil { log.Fatalf("CallTool failed: %v", err) } if res.IsError { log.Fatal("tool failed") } for _, c := range res.Content { log.Print(c.(*mcp.TextContent).Text) } } ``` The [`examples/`](/examples/) directory contains more example clients and servers. ## Design The design doc for this SDK is at [design.md](./design/design.md), which was initially reviewed at [modelcontextprotocol/discussions/364](https://github.com/orgs/modelcontextprotocol/discussions/364). Further design discussion should occur in [issues](https://github.com/modelcontextprotocol/go-sdk/issues) (for concrete proposals) or [discussions](https://github.com/modelcontextprotocol/go-sdk/discussions) for open-ended discussion. See [CONTRIBUTING.md](/CONTRIBUTING.md) for details. ## Acknowledgements Several existing Go MCP SDKs inspired the development and design of this official SDK, notably [mcp-go](https://github.com/mark3labs/mcp-go), authored by Ed Zynda. We are grateful to Ed as well as the other contributors to mcp-go, and to authors and contributors of other SDKs such as [mcp-golang](https://github.com/metoro-io/mcp-golang) and [go-mcp](https://github.com/ThinkInAIXYZ/go-mcp). Thanks to their work, there is a thriving ecosystem of Go MCP clients and servers. ## License This project is licensed under the MIT License - see the [LICENSE](./LICENSE) file for details. ", Assign "at most 3 tags" to the expected json: {"id":"14384","tags":[]} "only from the tags list I provide: [{"id":77,"name":"3d"},{"id":89,"name":"agent"},{"id":17,"name":"ai"},{"id":54,"name":"algorithm"},{"id":24,"name":"api"},{"id":44,"name":"authentication"},{"id":3,"name":"aws"},{"id":27,"name":"backend"},{"id":60,"name":"benchmark"},{"id":72,"name":"best-practices"},{"id":39,"name":"bitcoin"},{"id":37,"name":"blockchain"},{"id":1,"name":"blog"},{"id":45,"name":"bundler"},{"id":58,"name":"cache"},{"id":21,"name":"chat"},{"id":49,"name":"cicd"},{"id":4,"name":"cli"},{"id":64,"name":"cloud-native"},{"id":48,"name":"cms"},{"id":61,"name":"compiler"},{"id":68,"name":"containerization"},{"id":92,"name":"crm"},{"id":34,"name":"data"},{"id":47,"name":"database"},{"id":8,"name":"declarative-gui "},{"id":9,"name":"deploy-tool"},{"id":53,"name":"desktop-app"},{"id":6,"name":"dev-exp-lib"},{"id":59,"name":"dev-tool"},{"id":13,"name":"ecommerce"},{"id":26,"name":"editor"},{"id":66,"name":"emulator"},{"id":62,"name":"filesystem"},{"id":80,"name":"finance"},{"id":15,"name":"firmware"},{"id":73,"name":"for-fun"},{"id":2,"name":"framework"},{"id":11,"name":"frontend"},{"id":22,"name":"game"},{"id":81,"name":"game-engine "},{"id":23,"name":"graphql"},{"id":84,"name":"gui"},{"id":91,"name":"http"},{"id":5,"name":"http-client"},{"id":51,"name":"iac"},{"id":30,"name":"ide"},{"id":78,"name":"iot"},{"id":40,"name":"json"},{"id":83,"name":"julian"},{"id":38,"name":"k8s"},{"id":31,"name":"language"},{"id":10,"name":"learning-resource"},{"id":33,"name":"lib"},{"id":41,"name":"linter"},{"id":28,"name":"lms"},{"id":16,"name":"logging"},{"id":76,"name":"low-code"},{"id":90,"name":"message-queue"},{"id":42,"name":"mobile-app"},{"id":18,"name":"monitoring"},{"id":36,"name":"networking"},{"id":7,"name":"node-version"},{"id":55,"name":"nosql"},{"id":57,"name":"observability"},{"id":46,"name":"orm"},{"id":52,"name":"os"},{"id":14,"name":"parser"},{"id":74,"name":"react"},{"id":82,"name":"real-time"},{"id":56,"name":"robot"},{"id":65,"name":"runtime"},{"id":32,"name":"sdk"},{"id":71,"name":"search"},{"id":63,"name":"secrets"},{"id":25,"name":"security"},{"id":85,"name":"server"},{"id":86,"name":"serverless"},{"id":70,"name":"storage"},{"id":75,"name":"system-design"},{"id":79,"name":"terminal"},{"id":29,"name":"testing"},{"id":12,"name":"ui"},{"id":50,"name":"ux"},{"id":88,"name":"video"},{"id":20,"name":"web-app"},{"id":35,"name":"web-server"},{"id":43,"name":"webassembly"},{"id":69,"name":"workflow"},{"id":87,"name":"yaml"}]" returns me the "expected json"