Error Codes

HTTP Status Codes

Code	Meaning
200	Success
201	Created
400	Bad Request
401	Unauthorized
403	Forbidden
404	Not Found
429	Rate Limited
500	Server Error

Common Errors

Authentication

Code	Solution
INVALID_API_KEY	Check API key
MISSING_API_KEY	Add x-api-key header
INSUFFICIENT_SCOPE	Create key with proper scopes

Phone Numbers

Code	Solution
KYC_REQUIRED	Complete verification
INSUFFICIENT_BALANCE	Add credits
NUMBER_NOT_AVAILABLE	Choose different number

Calls

Code	Solution
INVALID_PHONE_NUMBER	Use E.164 format
NO_ENDPOINT	Attach endpoint to number
ENDPOINT_UNREACHABLE	Check endpoint config