open_api_to_mcp_server
Provides an MCP server that dynamically generates MCP tools from an uploaded OpenAPI (Swagger) specification and exposes them over both HTTP and stdio. It also supports calling OpenAPI operations via a /mcp HTTP endpoint, mapping operationId names to generated tools.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
TLS requirements and transport security are not stated (README only shows localhost HTTP usage). Auth is supported via Bearer token or API key using environment variables, but there is no documented scope/authorization model, token format, or guidance on secure transport. No information is provided about secret logging hygiene, input validation, SSRF/command execution protections, or rate limiting.
⚡ Reliability
Best When
You have a valid OpenAPI spec, you want to enable tool use by LLM agents quickly, and you can run/manage the Go MCP server yourself (local or controlled environment).
Avoid When
You need clear, documented rate limiting/pagination conventions, strong/standard auth flows (OAuth2) with scopes, or guaranteed operational robustness without further verification.
Use Cases
- • Expose an existing REST API described by OpenAPI to AI agents as MCP tools
- • Rapidly integrate LLM agents with internal/external APIs without writing bespoke tool wrappers
- • Prototype agent-driven workflows against multiple OpenAPI-defined endpoints by uploading specs
- • Use stdio MCP transport for local/embedded agent integrations
Not For
- • Production-grade security hardening without additional review (auth/rate limiting/error semantics not fully specified in README)
- • High-availability or enterprise reliability requirements without an SLA and maturity signals
- • Environments requiring strict compliance/data residency guarantees
Interface
Authentication
Authentication is described only at a high level (environment variables for optional Bearer token or API key). No explicit header/query parameter names, token format, or scope model is documented in the README.
Pricing
No pricing information provided; repository appears to be a self-hosted Go server.
Agent Metadata
Known Gotchas
- ⚠ Tool names are based on OpenAPI operationId; if operationId is missing or inconsistent, agents may not find/choose the intended tool.
- ⚠ The README does not document pagination or consistent handling of list endpoints; agents may need guidance to request limits/offsets if your OpenAPI defines them.
- ⚠ Authentication is described but not how the server expects credentials on the HTTP /upload and /mcp calls; agent setups may require manual header configuration after testing.
Alternatives
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Scores are editorial opinions as of 2026-04-04.