MCP100 verdict
Recommended official MCP SDK for Go when you need direct, first-party protocol support for building MCP clients or servers.
MCP100 Assessment
Editorial verdict
Reviewed September 11, 2026
Task Fit
Mapped
Developer workflows
Trust
Reviewed
A dated editorial review is published on the MCP detail page.
Maintenance
Date unavailable
No dated repository or package update is currently stored.
Popularity
Signals unavailable
No independently comparable adoption metric is currently stored.
Evidence scope
No MCP-specific repository metric is stored
No MCP-specific package metric is stored
Stars observation date unavailable · Downloads observation date unavailable
Publisher activity observed September 11, 2026
Current source snapshot
Source relationship: First-party MCP
Reviewed September 11, 2026
Evidence-backed setup
This profile has type-appropriate, source-backed setup rather than an MCP-server client connector configuration.
Type-appropriate, source-backed setup for this sdk profile.
go get github.com/modelcontextprotocol/go-sdk/mcpCapability
Recommended official MCP SDK for Go when you need direct, first-party protocol support for building MCP clients or servers.
First-party Go protocol primitives for exposing MCP server capabilities.
First-party Go client primitives for connecting to MCP servers.
Use the current official SDK line for MCP negotiation, requests, notifications, and supported transports.
This is an SDK, not a fixed MCP server tool catalog.
Not measured yet
Estimated token footprint of the MCP tool schemas exposed to the agent.
Reviewed access
Review the exact access boundary before connecting this MCP to accounts, credentials, or sensitive data.
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Model Context Protocol project is listed as First-party MCP in MCP100’s current evidence.
Current official resources:
Original product, capability, tool, and usage documentation from the MCP publisher. Installation sections appear under Install & Agents.
This repository contains an implementation of the official Go software development kit (SDK) for the Model Context Protocol (MCP).
The SDK consists of several importable packages:
github.com/modelcontextprotocol/go-sdk/mcp
package defines the primary APIs for constructing and using MCP clients and
servers.github.com/modelcontextprotocol/go-sdk/jsonrpc package is for users implementing
their own transports.github.com/modelcontextprotocol/go-sdk/auth
package provides some primitives for supporting OAuth.github.com/modelcontextprotocol/go-sdk/oauthex
package provides extensions to the OAuth protocol, such as ProtectedResourceMetadata.The SDK endeavors to implement the full MCP spec. The docs/ directory
contains feature documentation, mapping the MCP spec to the packages above.
The following table shows which versions of the Go SDK support which versions of the MCP specification:
| SDK Version | Latest MCP Spec | All Supported MCP Specs |
|---|---|---|
| v1.7.0+ | 2026-07-28 | 2026-07-28, 2025-11-25*, 2025-06-18, 2025-03-26, 2024-11-05 |
| v1.4.0 - v1.6.1 | 2025-11-25* | 2025-11-25*, 2025-06-18, 2025-03-26, 2024-11-05 |
| v1.2.0 - v1.3.1 | 2025-11-25** | 2025-11-25**, 2025-06-18, 2025-03-26, 2024-11-05 |
| v1.0.0 - v1.1.0 | 2025-06-18 | 2025-06-18, 2025-03-26, 2024-11-05 |
* Client side OAuth has experimental support.
** Partial support for 2025-11-25 (client side OAuth and Sampling with tools not available).
The roots, sampling, and logging features are deprecated as of protocol version 2026-07-28 by SEP-2577. The SDK continues to support them for compatibility during the deprecation window (at least twelve months). See the individual feature documentation for migration guidance.
New releases of the SDK target only supported versions of Go. See https://go.dev/doc/devel/release#policy for more information.
We welcome contributions to the SDK! Please see CONTRIBUTING.md for details of how to contribute.
Several third party Go MCP SDKs inspired the development and design of this official SDK, and continue to be viable alternatives, notably mcp-go, originally 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.
This project is licensed under Apache 2.0 for new contributions, with existing code under MIT - see the LICENSE file for details.