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observability

MCP-native analytics, not page views

Tool calls, sessions, error rates and latency percentiles broken down by client, client version, protocol version and country, with discovery traffic excluded by default.

Our open source tools are used by developers at top companies

NorthwindApertureCogentLumenBrightpathSundialMeridianIroncladBlue HarborKestrel

How it runs

Understand how your server is actually used

  1. 1

    Measure

    Every call captured at the gateway.

  2. 2

    Segment

    Split by client, version and region.

  3. 3

    Diagnose

    Trace errors to a single session.

  4. 4

    Alert

    Get told before users complain.

Per-tool latency

p50, p95 and p99 for every tool, resource and prompt, so you know which one is slow.

Tool calls · 24h24,732

last 24h ↑ 12.4%

By country34 regions

Tracesp50 42ms

  • tools/call display_weatherclaude142ms
  • resources/listchatgpt18ms
  • tools/call search_docscursor842ms
  • prompts/listcopilot12ms
  • tools/call fetch_urlclaude503

p50

38ms

p95

112ms

errors

0.2%

Session replay

The full timeline of a conversation, including the arguments each tool received.

Cloud Inspectorsession #4f2a

San Francisco, CA

72°F

Partly cloudy · H 74° L 58°

now72°
2pm74°
3pm73°
4pm70°
5pm66°
6pm63°

tools/call

{
  "name": "display_weather",
  "arguments": { "city": "San Francisco" }
}

result20041ms

{ "content": [{ "type": "resource" }] }

GPT-5.2

18/18

Claude

18/18

Gemini

17/18

Issue triage

Errors grouped into issues with first-seen, last-seen and affected clients.

Publishing checks3 / 4 passing
  • Protocol & discovery
  • Tool conformance
  • Security & policy
  • !Domain / TLS / CSP

Submission pack

In the box

Numbers that mean something for MCP

1

Tool-call volume

What the models actually reach for.

2

Client breakdown

Which hosts your users are on.

3

Error rates

Grouped, deduplicated and triaged.

4

Internal traffic

Dashboard calls excluded by default.

Stop guessing how your MCP server behaves