mcp observability

See how agents actually use your MCP server.

What works, what's missing, where the agent gave up. Built on a one-line SDK with observability and enchancements baked in.

OSS · Apache 2.0·building in the open·TypeScript + Python [more soon]
agent session· sess_8h2a9cclaude-3.7·1.04s·ended without completion
tool callstatusdurationwhat the agent did
search_flights({ from: "SFO", to: "JFK" })
200
410ms
✓ok
search_flights({ from: "SFO", to: "JFK", date: "2026-05-22" })
200
380ms
⟳retried · added args
book_flight({ flight_id: "AA192" })
400
120ms
⚠error · unknown field
book_flight({ id: "AA192" })
400
118ms
⟳retried · still failing
(no further calls — agent stopped)
—
—
✗stopped after error