Billy
Billy · Accounting
Accounting for small businesses: invoices, bills and bank transactions
The client pastes their API key from Billy's settings. We store it encrypted.
Tested against Billy's live API.
Building with Billy? The docs have setup steps and code for every tool.
Open the Billy docsTools
Your agent calls any endpoint of Billy's API with the request tool, with the client's access attached.
Base URL for request
https://api.billysbilling.com/v2
request
HTTPS ANY /v1/clients/{clientId}/billy/{path}
Any endpoint of Billy's own API, with the client's access attached.
- servicestringrequired
- This service: billy
- methodstringrequired
- GET, POST, PUT, PATCH or DELETE
- pathstringrequired
- The path under https://api.billysbilling.com/v2
- queryobjectoptional
- Query parameters
- bodyobjectoptional
- A JSON body
Over MCP every tool also takes client_id, from list_clients. Over HTTPS send it as clientId to https://api.operate.as/v1.
What the client approves
- Use the Billy key you paste, with only the access you gave that key
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