Error Codes

Here are some of the error codes you might encounter:

Error Code	API	Reason
302	Authorise	Possible to have the following error codes in the 'error' attribute. 500: Unknown or other server side errors 503: Myinfo under maintenance access_denied: When user did not give consent
400	Token	Same authcode in the body is being re-used.
Authcode error - missing, invalid, expired, revoked.
401	Token	No security header given
Invalid App ID used. Digital service is not registered with Myinfo
The timestamp of server is not synchronised. Check timestamp of server
The value of the nonce in the authorisation header was deemed to be repeated. Check that the nonce is not re-used
Ensure HTTP 'Authorization' header to be 'PKI_SIGN'
Person	No security header given
Invalid App ID used. Digital service is not registered with Myinfo
The timestamp of server is not synchronised. Check timestamp of server
The value of the nonce in the authorisation header was deemed to be repeated. Check that the nonce is not re-used
Ensure HTTP 'Authorization' header to be 'PKI_SIGN'
The requested UIN/FIN does not match the UIN/FIN of the person who logged in
Requested attributes do not match the attributes consented by person
403	Person	Requested attributes does not match the attributes consented by person. This happens if the list of attributes in your request are different from the attributes specified when calling the token API.
Incorrect API URL used
Digital service is not registered with Myinfo
Request contains attributes not allowable for the digital service
404	Token	Incorrect API URL used.
Same authcode in the body is being re-used.
Person	Incorrect API URL used.
UIN/FIN has a Singpass account, but does not have a Myinfo profile
500	Token	Unexpected error. Check response body for actual error.
Person	Unexpected error. Check response body for actual error.