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Missing Token

Understand the SumUp API Missing Token response, common causes, and example payload for unauthenticated requests.

Indicates that the request has not been applied because it lacks valid authentication credentials for the target resource.

Common Causes

Section titled “Common Causes”
  • The Authorization header is missing.
  • The token is not included in the request at all.
  • The header is present but empty or malformed.
{
  "message": "access token required",
  "error_code": "NOT_AUTHORIZED"
}