What it means
a query parameter the route does not define.
How to handle it
Remove the named query parameter or replace it with one declared for this route.
Wire contract
| Code | unknown_parameter |
|---|---|
| Class | invalid_request |
| HTTP status | 400 |
| Meta keys | None |
| Raised | Yes |
The response uses the standard {"error": {…}} envelope. Branch on error.code, not the human-readable message. Preserve request_id when reporting a failure.