# Errors

# HTTP Error codes

The GoSMS API returns the following HTTP Error codes:

Code	Meaning
200	OK
400	Bad Request: your request contains invalid data
401	Unauthorized: you sent an invalid API key
402	Payment Required: you need to top-up your account

The GoSMS API returns the following request error codes:

Code	Meaning
RECIPIENT_MISSING	The `recipient` field is missing
MESSAGE_MISSING	The `message` field is missing
INVALID_PHONE	The phone number has an invalid format
PHONE_BLACKLISTED	The phone number is blacklisted
LIMIT_ERROR	You've exceeded the monthly limit for sending SMS
SCHEDULE_ERROR	The date you are trying to use is not in the future
DATE_ERROR	The date has an invalid format