{"repo":"enmanuelmag/heimdall-mcp","free":true,"listed":false,"github":"https://github.com/enmanuelmag/heimdall-mcp","clone":"git clone https://github.com/enmanuelmag/heimdall-mcp.git","description":"Transparent MCP proxy with OpenTelemetry tracing. Wrap any MCP server and persist traces to SQLite, Postgres or MySQL.","language":"TypeScript","stars":11,"topics":["agent","audit","audit-trail","javascript","mcp","model-context-protocol","observability","opentelemetry","postgresql","proxy"],"license":null,"category":"mcp-servers","readme_excerpt":"@cardor/heimdall-mcp Transparent proxy for any MCP server. Intercepts all JSON-RPC messages, measures latency, stores traces in a configurable database, and enforces per-server allow/deny policies — without touching the original server. Visit the website to view a full explanation, examples, and other tools! Table of Contents - @cardor/heimdall-mcp - Table of Contents - How it works - Installation - Policy config - Config files - Config format - Merge strategy - Argument policies - Resource locks - Host policies - Limitations - What happens when a call is blocked - Server name - Policy config in library mode - Usage modes - Mode 1 — CLI wrapping a subprocess (stdio) - Mode 2 — CLI wrapping a remote HTTP server - Mode 3 — CLI wrapping a remote SSE server - Mode 4 — Library for developers - Stores - SQLite - PostgreSQL - MySQL - What gets recorded - Jaeger UI (OTLP) - 1. Start Jaeger - 2. Add --otlp to your config - 3. Open Jaeger UI - Custom interceptors - CLI reference - start - init - health - Tracing reference - Roadmap --- How it works The proxy always exposes stdio to the MCP client and speaks the correct transport to the real server. Every request/response pair is converted into a span with timing, attributes, and the input/output body. --- Installation --- Policy config Drop a heimdall.config.ts in your project root and define exactly which tools, prompts, and resources each MCP server is allowed to expose to the agent — at the proxy layer, without touching the server c","default_branch":null,"files":null,"tree":[],"storefront":"/r/enmanuelmag","claimed":false,"request_supported":{"post":"https://gitbuyer.com/r/enmanuelmag/heimdall-mcp/request-supported","requests":0},"note":"indexed from public GitHub; nothing is for sale on this page. Clone it from GitHub. Paid listings live at /search."}