golang-mcp-server-sdk
A Go SDK to build MCP (Model Context Protocol) servers, letting developers expose MCP tools, resources, and prompts over multiple transports (stdio and HTTP with SSE), while handling MCP protocol message routing and lifecycle in accordance with the MCP specification.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
The README does not mention authentication/authorization. HTTP transport is configured via address/SSE but TLS requirements are not specified. Tool handlers are user-defined; the example demonstrates basic input validation but there is no evidence (from provided content) of standardized structured error handling, sanitization guidance, or secure secret management patterns.
⚡ Reliability
Best When
You want to implement MCP server functionality in Go and need a lightweight, code-first approach with transport support for stdio and HTTP/SSE.
Avoid When
You need explicit, SDK-provided auth, rate limiting, and operational guarantees (SLA, retries/idempotency guidance) out of the box—those are not evident from the provided material.
Use Cases
- • Building MCP servers in Go that expose tools (function calls) to LLM clients
- • Providing read-only data via MCP resources
- • Serving MCP over stdio for local/CLI integrations
- • Serving MCP over HTTP using SSE for real-time tool/resource interactions
- • Creating small MCP demo servers (e.g., echo/calculator) quickly via examples
Not For
- • Production deployments requiring a hosted SaaS endpoint, billing, or managed authentication flows
- • Use cases that need a REST/GraphQL-style API surface instead of the MCP (JSON-RPC over transport) model
- • Environments where server-to-server security requirements (TLS, auth, and strict transport controls) are not already designed at the application layer
Interface
Authentication
The README describes running MCP servers over stdio and HTTP/SSE but does not document any built-in authentication/authorization mechanism (e.g., API keys, OAuth, JWT). Any auth is likely left to the embedding application or transport layer.
Pricing
Open-source SDK (MIT badge shown); no pricing model described.
Agent Metadata
Known Gotchas
- ⚠ MCP/JSON-RPC semantics: tool handlers should validate parameters robustly; example uses type assertions and returns plain errors, but no standardized error-code schema is documented in the provided README.
- ⚠ No documented auth or rate-limit behavior: agents may need to implement transport/app-level controls or be prepared for server rejection without clear guidance.
- ⚠ Resource/Prompt support is described as 'using internal API' and 'being updated in the public API', suggesting partial/unstable public coverage.
Alternatives
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Scores are editorial opinions as of 2026-04-04.