# 20410: Gone

Log Type: APPLICATION

Log Level: ERROR

## Description

Twilio returns this error when you request a discontinued messaging API. The API is no longer available.

### Possible causes

* You are sending messages through a discontinued API.
* You are still using the legacy `SMS/Messages` endpoint.

### Possible solutions

* Update your integration to use the current Messaging API endpoints.
* Replace any requests to the legacy `SMS/Messages` URI with the `Messages` resource URI.
* Review the current Messaging API and `Messages` resource documentation before you deploy changes.

#### Additional resources

* [Messaging API overview](/docs/messaging/api)
* [Messages resource](/docs/messaging/api/message-resource)
* [Switching from SMS/Messages resource URI to Messages resource URI](https://help.twilio.com/articles/223181028-Switching-from-SMS-Messages-resource-URI-to-Messages-resource-URI-)