invalid_request

The request is invalid.

HTTP status	400
code	invalid_request
Retry?	No, fix the request first

What it means

The body or a parameter does not match the schema: a required field is missing, an unknown field was sent, a type is wrong, a text is too long, a time or rule is invalid. Malformed JSON ends up here too. errors lists every problem at once, each with field, code and message.

How to fix it

Read errors[].field and errors[].code. Domain codes such as invalid_timezone, end_before_start or unsupported_rrule are explained under Events: validation errors. Schema violations carry the validator’s code, for example invalid_type, too_big or unrecognized_keys (an unknown field, often a typo).

Example

{
  "type": "https://docs.kalender-sync.de/en/api/errors/invalid_request",
  "title": "The request is invalid",
  "status": 400,
  "code": "invalid_request",
  "request_id": "req_…",
  "errors": [
    {
      "field": "end",
      "code": "end_before_start",
      "message": "end must not be before start."
    },
    {
      "field": "recurrence.rules[0]",
      "code": "unsupported_rrule",
      "message": "BYHOUR is not supported."
    }
  ]
}

→ All error codes