INVALID_JSON

The request body contains invalid JSON syntax.

Category: General


HTTP status	`400` Bad Request
Retry	After fixing the cause

When it happens

The body could not be read: it is not valid JSON, or a property has the wrong type or format (a string where a number is expected, a date that does not parse). error.details names the field, the invalid_value and, where there is one, the expected_format.

How to fix it

Validate the JSON and the types of the properties named in error.details. Dates go as YYYY-MM-DD and amounts as JSON numbers.

Retry

Not as is: the same request fails the same way. Fix the cause described above, then send the request again, under a new Idempotency-Key if the body changed.

Example response

When this error occurs, the API answers 400 Bad Request with a JSON body of this shape:

{
  "type": "https://docs.beel.es/errors/INVALID_JSON_FORMAT",
  "title": "INVALID_JSON_FORMAT",
  "detail": "The request body contains invalid JSON syntax.",
  "instance": "/v1/<resource>",
  "errors": [],
  "success": false,
  "error": {
    "code": "INVALID_JSON_FORMAT",
    "message": "The request body contains invalid JSON syntax.",
    "details": {}
  },
  "meta": {
    "timestamp": "2026-05-21T10:00:00Z",
    "request_id": "4bf92f3577b34da6a3ce929d0e0e4736"
  }
}