Error codes
All Firmium API endpoints require a valid API key. The API signals errors with standard HTTP status codes. Error responses are JSON; most contain adetail field with a human-readable message. The message text can change, so rely on the HTTP status code in your code.
400: Bad Request
The request is malformed or incomplete. For invalid input, the body lists the affected fields with their messages.403: Forbidden
The API key is missing, invalid, or revoked, or your plan does not include API access.404: Not Found
The requested resource does not exist.429: Too Many Requests
The rate limit was exceeded. TheRetry-After header states how many seconds to wait. See Rate limits.