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go-sdk/internal/readme/README.src.md
Rob Findley f4ed9b5904 internal/mcp: update CONTRIBUTING.md and README.md for the official SDK 
Change CONTRIBUTING.md and README.md to reflect that the MCP SDK is
being moved to github.com/modelcontextprotocol/go-sdk, and to include
content from the 'Governance' section of the design doc. Also, include
the antitrust policy as a section in CONTRIBUTING.md.

Change-Id: I46784d8e57b2a2cab8895593f633d20a2e15c8ba
Reviewed-on: https://go-review.googlesource.com/c/tools/+/682976
Reviewed-by: Sam Thanawalla <samthanawalla@google.com>
Auto-Submit: Robert Findley <rfindley@google.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2025-06-20 13:30:05 -07:00

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MCP Go SDK

PkgGoDev

This repository contains an implementation of the official Go software development kit (SDK) for the Model Context Protocol (MCP).

WARNING: The SDK is currently unstable and subject to breaking changes. Please test it out and file bug reports or API proposals. The TODO section below outlines outstanding release blockers. We aim to release a stable version of the SDK in mid July, 2025.

%toc

Package documentation

The SDK consists of two importable packages:

Example

In this example, an MCP client communicates with an MCP server running in a sidecar process:

%include client/client.go -

Here's an example of the corresponding server component, which communicates with its client over stdin/stdout:

%include server/server.go -

The examples/ directory contains more example clients and servers.

TODO

The following TODOs block the release of this SDK:

  • Better support for resumability in the Streamable HTTP transport: a server-side event store and client-side retry configuration.
  • OAuth support (or examples of implementing OAuth using middleware).
  • Support for the changes in the 2025-06-18 version of the MCP spec.
  • More examples and documentation.

Design

The design doc for this SDK is at design.md, which was initially reviewed at modelcontextprotocol/discussions/364.

Further design discussion should occur in GitHub issues. See CONTRIBUTING.md for details.

Acknowledgements

Several existing Go MCP SDKs inspired the development and design of this official SDK, notably 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 and 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 file for details.