# invalid_param

URL: /evidence/errors/invalid_param · Id: `error:invalid_param`

> A parameter is not of its type, misses its pattern, or is not one of its values.

The `invalid_param` [Problem](/evidence/errors) means: a parameter is not of its type, misses its pattern, or is not one of its values.

## Answer
| Status | Title |
| --- | --- |
| 400 | Bad Request |

```json
{
  "type": "about:blank",
  "title": "Bad Request",
  "status": 400,
  "detail": "What went wrong, in words.",
  "code": "invalid_param"
}
```

## Fix
Send the parameter as the operation declares it, as its docs page shows.