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The Fail Fast API is a REST API that gives external tools access to the same records your team works with in the app — stakeholders, quotes, orders, invoices, inventory, treasury records, CRM data, and tasks. Use it to connect integration platforms like n8n and Zapier or your own custom services.

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Base URL

All endpoints are served from:

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Authentication

Every request needs a workspace API key sent as a bearer token:
Keys are created in the app under Settings → Workspace → API Keys. See Authentication for details, rate limits, and key management.

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Response envelope

Every response — success or failure — uses the same JSON envelope:
  • message describes what happened.
  • error is false on success and true on failure.
  • data carries the payload: a record, a paginated list, or error details.
The HTTP status code still signals the outcome class (2xx success, 4xx client error). See Errors.

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Scope of this reference

This reference documents the core business entities — the stable, curated surface intended for external integrations. Each entity supports the standard operations: list, retrieve, create, update, and delete.
Deletes are logical: DELETE marks the record as deleted instead of removing it, and the record can be recovered from the app.
Your API key acts on one workspace and inherits the permissions of the member it belongs to. Requests against entities the member cannot read or modify are rejected, and modules that are not enabled for the workspace hold no data.

Authentication

API keys, rate limits, and key management.

Pagination and filtering

Page through lists and narrow results with field filters.

Errors

Status codes and the error envelope.

API keys in the app

How administrators create and revoke keys.