mcp-go-sdk

A Go SDK implementing the Model Context Protocol (MCP), providing building blocks to create MCP servers (tool/resource/prompt registration and execution) and to communicate with MCP clients over multiple transports (stdio, SSE, WebSocket).

Evaluated Apr 04, 2026 (16d ago)

Repo ↗ DevTools mcp go json-rpc sdk tools resources prompts transport-stdio transport-websocket transport-sse

⚙ Agent Friendliness

/ 100

Can an agent use this?

🔒 Security

/ 100

Is it safe for agents?

⚡ Reliability

/ 100

Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality

Documentation

Error Messages

Auth Simplicity

Rate Limits

🔒 Security

TLS Enforcement

Auth Strength

Scope Granularity

Dep. Hygiene

Secret Handling

No authentication/authorization, TLS requirements, or secrets-handling practices are described in the README. For WebSocket/SSE transports, security will depend on the surrounding application configuration; run with proper network controls, and implement auth at the application layer if needed.

⚡ Reliability

Uptime/SLA

Version Stability

Breaking Changes

Error Recovery

Best When

You control both client and server and want to embed MCP server functionality into Go applications using MCP-native transports and handlers.

Avoid When

You need strong, documented security controls (authz, secrets handling guidance) or a conventional HTTP API contract (OpenAPI/SDK) for agent tooling.

Use Cases

• Building an MCP server in Go that exposes callable tools to an MCP client
• Exposing resources with pattern matching for retrieval by MCP clients
• Serving prompt templates (single- or multi-message) via MCP
• Using MCP over stdio for local/CLI integrations
• Using MCP over Web transports (SSE/WebSocket) for browser or web-app scenarios

Not For

• A managed, hosted API product with turnkey authentication and rate limiting
• Use cases that require fine-grained enterprise auth/authorization guarantees out of the box
• Scenarios that need a public REST/GraphQL/HTTP API surface with documented schemas and versioned endpoints

Interface

REST API

GraphQL

gRPC

MCP Server

Yes

SDK

Yes

Webhooks

Authentication

OAuth: No Scopes: No

The provided README does not describe any authentication/authorization mechanism for the transports or server endpoints.

Pricing

Free tier: No

Requires CC: No

Open-source SDK (MIT license) as indicated by repository metadata; no hosted pricing described.

Agent Metadata

Pagination

none

Idempotent

False

Retry Guidance

Not documented

Known Gotchas

⚠ README does not document transport-level reliability semantics (reconnect behavior, request timeouts) or how agents should retry failed JSON-RPC calls safely.
⚠ Auth and authorization behavior is not documented; agents may need to implement their own transport security or run in trusted networks.

Alternatives

Official MCP SDKs from the Model Context Protocol ecosystem (depending on language) Building MCP servers directly using the MCP JSON-RPC spec without this SDK (for tighter control) Community MCP server implementations in other languages with stronger security/documentation if available

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API endpoint ↗ Agent guide ↗ Report inaccuracy

Scores are editorial opinions as of 2026-04-04.