io.github.nickgeorgeseo/fieldtwin
fieldtwin
Is the fieldtwin MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-30.
Local, stateful twins of the Jobber, Housecall Pro, and QuickBooks Online APIs, for agents and tests
alive probed 2026-11-15 · unchanged since 2026-10-30
- Run it
- npx -y fieldtwin@0.5.3 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- fieldtwin 0.5.3
- Capabilities
- tools
- Instructions
- none
- Of a 1M window
- 0.3 % of a 1M context window
- Count
- 2.9k tokens in Claude Opus 5.5, exact, measured 2026-10-30. With the Claude Code prefix mcp__…__ on each tool name: 3.1k. The o200k_base estimate is 1.7k. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/nickgeorgeseo/fieldtwin
- Website
- https://nickgeorgeai.com/fieldtwin
- Registry
- active, updated 2026-10-29 · registry entry
Most expensive tools
The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.77×.
| Tool | ≈ Claude tokens | o200k estimate | Share of this server |
|---|---|---|---|
| twin_set_webhooks | 419 | 237 | 14 % |
| twin_set_faults | 361 | 204 | 12 % |
| twin_run_action | 303 | 171 | 10 % |
| twin_load_scenario | 269 | 152 | 9 % |
| twin_changes | 239 | 135 | 8 % |
Compare this server with others.
More servers
Other registry entries on npmjs.com, the ones next to this name; all of them.
- io.github.nick-ma/uk-parliament-oralquestionsandmotions · alive
- io.github.nick-ma/uk-parliament-questions-statements · alive
- io.github.nick-ma/uk-parliament-statutoryinstruments · alive
- io.github.nick-ma/uk-parliament-treaties · alive
- io.github.nickjazz/product-lock-mcp · alive
- io.github.nickjlamb/groundwork · alive
- io.github.nickjlamb/opengate-mcp · alive
- io.github.nickjlamb/pubcrawl · alive
Servers that mention quickbooks or housecall.
- DeepLedger: QuickBooks, Xero & Bill.com MCP for ChatGPT & Claude ai.deepledger/mcp · needs auth
- PipeLedger ai.pipeledger/pipeledger · needs auth
- RoboSystems ai.robosystems/robosystems · needs auth
- com.accountingqb/accountingqb · needs auth
- Caribooks (QuickBooks Online) com.caribooks/quickbooks · needs auth
- FitMySoft — Field Service Software Prices com.fitmysoft/pricing · alive
- QuickBooks Connector by Meridian com.pilot.meridian/qbo-connector · needs auth
- Housecall Pro MCP by usefulapi io.usefulapi/housecall-pro · timeout
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.