Features
Real-time MCP request tracing (tool calls, prompts, resources)
Full JSON-RPC payload capture with arguments, results, errors
Per-server/per-client/per-tool performance metrics (P50/P95/P99)
Session tracking and duration breakdowns
Error tracking with stack traces and context
Alert rules (Pro: up to 10, Business: up to 100) with Slack, webhook, email
Public dashboards (Pro+) with read-only share links
Multi-region ingestion (US and EU)
Data retention from 30 days (Free) to 12 months (Business)
SAML/OIDC single sign-on (Business)
Open-source SDK and CLI (Apache 2.0)
No-code install via CLI (wraps stdio/HTTP proxy)
W3C trace context propagation for APM correlation
Header redaction for credentials
Distributed tracing for LLM agents
Capture prompts, retrievals, tool calls, outputs
Human annotations on traces
Create datasets from traces
Run experiments to compare changes
OpenTelemetry-native instrumentation
Self-host locally, Docker, or Kubernetes
Cloud instances with free tier
Vendor agnostic: any model or framework
3M+ monthly downloads, 9k+ GitHub stars
