| Status | Meaning |
|---|---|
400 | Validation or business-rule error. |
401 | Invalid credentials, stale timestamp, or bad signature. |
403 | API key scope is not sufficient. |
404 | Entity does not exist or is not accessible for the API key company. |
409 | Request conflicts with the current entity state. |
500 | Unexpected server error. |
Integration basics
Errors
Understand YoLead Public API error responses.
Errors return a stable JSON shape: