Observed arrival · 2026-11-15
opentel-mcp catches the failure hiding inside “200 OK”
An OpenTelemetry layer for Node.js and Python MCP servers that detects silent tool-call failures, tool-definition changes, and secret leaks without blocking calls.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Teams instrumenting Node.js or Python MCP servers
- Worth noticing
- The page says tool arguments and results stay out of telemetry, with credentials scrubbed before emission.
Field notes
The package also describes health grades from A–F, detection of repeated failures within an agent session, and freshness checks using `asOf` with `maxAgeMs` or `freshUntil`. Its privacy notes say arguments and results are never recorded, while secret detection is opt-in and limited to type and count. The homepage reports 748 tests and more than 15,000 npm downloads since launch.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
ƒJavaScriptBrowser-side code central
One card from the complete issue