400: Bad Request

Twilio returns this error when a REST API request cannot be completed because the request is invalid. When a request is unsuccessful, the response includes an exception with the HTTP status, a message, and, when available, a Twilio-specific code and more_info value.

• A required parameter is missing from the request.
• One or more request parameters did not pass validation.
• The resource you are trying to modify has moved into a state that is no longer valid for that operation.

• Inspect the response message, code, and more_info fields to identify the exact problem in the request.
• Add any missing required parameters before you retry the request.
• Validate each request value against the endpoint requirements and correct any malformed or unsupported input.
• Verify that the resource exists and is still in a state that allows the requested update.
• Retry the request only after you confirm the request is valid.

• Our API: the basics
• Twilio Debugger