io.github.GuoBug/ferrycat
FerryCat
Is the FerryCat MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-04.
Contract-driven cross-host agent handoff, code review & verification harness via MCP & SQLite WAL
alive probed 2026-11-14 · unchanged since 2026-11-04
- Run it
- npx -y ferrycat@0.5.0 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- ferrycat 0.5.0
- Capabilities
- tools
- Instructions
- none
- Of a 1M window
- 0.9 % of a 1M context window
- Count
- 9.2k tokens in Claude Opus 5.5, exact, measured 2026-11-04. With the Claude Code prefix mcp__…__ on each tool name: 9.3k. The o200k_base estimate is 5.2k. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/GuoBug/FerryCat
- Registry
- active, updated 2026-11-04 · registry entry
- Changes
- 2 recorded, reachable in 2 of them. A row is added when the result, the tool count or the cost changes.
Most expensive tools
The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.77×.
| Tool | ≈ Claude tokens | o200k estimate | Share of this server |
|---|---|---|---|
| dispatch_contract | 2 170 | 1 224 | 24 % |
| fulfill_contract | 1 625 | 917 | 18 % |
| release_contract | 996 | 562 | 11 % |
| inspect_mesh_state | 977 | 551 | 11 % |
| verify_contract | 961 | 542 | 10 % |
Compare this server with others.
More servers
Other registry entries on npmjs.com, the ones next to this name; all of them.
- io.github.GuardBee/vector-store-scanner · alive
- io.github.GuardBee/vulnerability-scanner · alive
- Lex io.github.Guffawaffle/lex · crashed on start
- GetABrain io.github.Guitarmaniac24/getabrain · alive
- GuruPDF io.github.GuruPDF/gurupdf-mcp · alive
- io.github.HBarefoot/engram · crashed on start
- io.github.HMAKT99/erabi · alive
- io.github.HMAKT99/reashield · crashed on start
Servers that mention verification or contract.
- Contractor Licence Changes agency.ottobot/contractor-license-changes · alive
- AFMR Discovery ai.afmr/discovery · alive
- Plumbline - Contractor License Checks ai.agentlookups/plumbline · alive
- ai.atlasverified/atlas-mcp · needs auth
- AwardCast Federal Contracts ai.awardcast/federal-contracts · alive
- Contractors Near Me ai.contractorsnearme/contractors-near-me · needs auth
- DeployIt Product Expert ai.deployit/product-expert · alive
- ai.facesign/facesign-mcp · alive
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-11-04 08:05 | alive | 324 ms | 8 | 9.2k | 5.2k |
| 2026-10-26 07:01 | alive | 429 ms | 8 | 9.0k | 5.1k |
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.