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The Simplifi API is in Developer Preview. While not all features are finalised, we encourage you to explore and share your feedback — including thoughts on endpoint design, response structure, or areas where documentation could be clearer.
The Simplifi API uses the standard HTTP response codes to indicate the success or failure of an API request. A response code in the 2xx range indicates success, while a response code in the 4xx range indicates an error that failed as a result of the information that was provided. Codes in the 5xx range are the result of an error with Simplifi’s servers.
CodeResponseExplanation
400Bad RequestMalformed request, invalid JSON
401UnauthorizedMissing or invalid token
403ForbiddenValid token, but you cannot do this
404Not FoundThe resource you are trying to access doesn’t exist
409ConflictThe resource you are trying to create already exists
422Unprocessable EntityValidation errors
429Too Many RequestsYour rate limit has been exceeded
500Internal Server ErrorSomething unexpected broke
502Bad GatewayUpstream service failed
503Service UnavaliableThe Simplifi servers are down or overloaded