Effective August 3, 2023, the messaging API will no longer process requests with an Accept header that is not compatible with application/json. We are making this change in an effort to address security vulnerabilities and provide the most reliable service possible.

Today, the messaging API will attempt to process requests with any content-type value in the Accept header. Beginning August 3, Bandwidth will only accept requests with an Accept header content-type compatible with application/json. Compatible types include application/json, application/*, and */*.

Any requests with an Accept header that do not include a content-type compatible with application/json will receive a 406 error message.

Please ensure that all requests to the messaging API have an Accept header that includes a content type compatible with application/json.

Please open a ticket with your Bandwidth Support Team or hit us up at (855) 864-7776!