# Get a trial API key

Opens a trial account and returns its API key, with no sign-up. The key is shown once; only its hash is kept. The trial plan includes a fixed number of paycheck computations.

- REST: `POST https://montaye.com/v1/trial-keys`
- MCP tool: `account_create_trial` at https://montaye.com/mcp
- Answer: `{ "result": …, "usage": … }`; refusals are `application/problem+json`

## Refusals

- [`input_invalid`](https://montaye.com/refusals/input_invalid) (400): The request does not match the action’s input schema.
- [`rate_limited`](https://montaye.com/refusals/rate_limited) (429): Too many requests from this client; slow down.
- [`database_unavailable`](https://montaye.com/refusals/database_unavailable) (503): The ledger database cannot be reached right now.