dev.checkbooth/checkbooth
Checkbooth
Is the Checkbooth MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-09.
Independent signed math checks for AI agents: PASS or FAIL plus a link anyone can open. Free beta.
alive probed 2026-11-14 · unchanged since 2026-11-09 · HTTP 200
- Endpoint
- https://checkbooth.dev/mcp (streamable-http)
- Host
- checkbooth.dev
- Protocol
- 2025-06-18
- Reports itself as
- checkbooth 0.1.0-beta
- Capabilities
- tools
- Instructions
- 278 characters
- Of a 1M window
- 0.2 % of a 1M context window
- Count
- 1.9k tokens in Claude Opus 5.5, exact, measured 2026-11-09. With the Claude Code prefix mcp__…__ on each tool name: 2.0k. The o200k_base estimate is 1.1k. Counted again when the tool definitions change. Method.
- Website
- https://checkbooth.dev
- Registry
- active, updated 2026-11-09 · registry entry
Most expensive tools
The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.81×.
| Tool | ≈ Claude tokens | o200k estimate | Share of this server |
|---|---|---|---|
| verify_claims_against_receipts | 246 | 136 | 13 % |
| run_formula | 240 | 133 | 13 % |
| verify_trig_expression | 215 | 119 | 11 % |
| verify_math_or_tolerance | 199 | 110 | 10 % |
| discover_capabilities | 186 | 103 | 10 % |
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Badge for the README
The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.
A mail when this server changes
Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.
For the publisher
- The server answers initialize and tools/list. Nothing to fix.
Fixed something? Probe it now, with the same steps as the daily run. This page updates with the next daily run.