Pleo uses conventional HTTP response codes to indicate the success or failure of an API request. In general: Codes in the 2xx range indicate success. Codes in the 4xx range indicate an error that failed given the information provided (e.g., a required parameter was omitted, a charge failed, etc.). Codes in the 5xx range indicate an error with Pleo's servers (these are rare).
Some 4xx errors that could be handled programmatically - include an error code that briefly explains the error reported.
Description of error code
All good, everything went as expected!
Unauthorised - No valid Token has been provided
Forbidden - The Token does not have sufficient permission
The requested resource does not exist
Internal server error