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Heimdall MCP
Trace every MCP tool call. No code changes needed.
Heimdall is a transparent proxy for any MCP server. Every tool call, resource read, and prompt is captured as an OpenTelemetry span and saved to SQLite, Postgres, or MySQL. Wrap your server with one line in mcp.json — no source access required.
Hey Product Hunt! I'm the maker of Heimdall MCP.
I built this after hitting the same wall every time I ran AI agents with
MCP tools: something was slow, or failing silently, and I had zero
visibility into what actually happened inside the server.
Which tool did Claude call? What input did it send? How long did it take?
No way to know.
Heimdall sits between your MCP client (Claude, OpenCode, Cursor) and any
MCP server — local or remote — and records every tool call as an
OpenTelemetry span. No modifications to the target server. Just wrap it
in mcp.json with one line change:
"command": "heimdall",
"args": ["--store", "sqlite://~/.heimdall/traces.db", "--", "node", "my-server.js"]
Storage options: SQLite (local, zero infra), Postgres, MySQL, or any
OTLP-compatible backend. Pure JS/WASM — no native deps, no node-gyp.
Also ships as a TypeScript library with a fluent builder API and custom
interceptors if you want tighter integration.
Happy to answer questions about the OTel schema design or the transport
mixing approach (stdio in → HTTP out). Those were the trickiest parts.
About Heimdall MCP on Product Hunt
“Trace every MCP tool call. No code changes needed.”
Heimdall MCP was submitted on Product Hunt and earned 1 upvotes and 1 comments, placing #147 on the daily leaderboard. Heimdall is a transparent proxy for any MCP server. Every tool call, resource read, and prompt is captured as an OpenTelemetry span and saved to SQLite, Postgres, or MySQL. Wrap your server with one line in mcp.json — no source access required.
On the analytics side, Heimdall MCP competes within Open Source, Developer Tools, Artificial Intelligence and GitHub — topics that collectively have 1.1M followers on Product Hunt. The dashboard above tracks how Heimdall MCP performed against the three products that launched closest to it on the same day.
Who hunted Heimdall MCP?
Heimdall MCP was hunted by Enmanuel Magallanes Pinargote. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Heimdall MCP including community comment highlights and product details, visit the product overview.
Enmanuel Magallanes Pinargote