API Referencev1.0
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Errors

Dutch API uses conventional HTTP response codes.

Codes in the 2xx range indicate success. Codes in the 4xx range indicate an error that failed given the information provided. Codes in the 5xx range indicate an error with Dutch API's servers.

CodeMeaning
200 OKEverything worked as expected.
201 CreatedThe resource was created successfully.
400 Bad RequestThe request was unacceptable, often due to a missing required parameter.
401 UnauthorizedNo valid API key or token was provided.
403 ForbiddenThe solution used is not yet approved for your account.
404 Not FoundThe requested resource doesn't exist.
422 UnprocessableValidation failed on one or more fields.
429 Too Many RequestsToo many requests hit the API too quickly.
500 Server ErrorSomething went wrong on our end.
{
  "code": 400,
  "success": false,
  "message": "Invalid request parameters"
}
Updated 2026
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