--- title: "Changes to Send a Fax" method: POST path: "/Accounts/{AccountSid}/Faxes" --- # Changes to Send a Fax `POST /Accounts/{AccountSid}/Faxes` > Every recorded change to this operation, newest first. ## Timeline Changed in 7 of 47 revisions. - **2026-05-12** `5344c0c93a4c`: 1 breaking, 5 info - **2026-03-04** `2e516ba2383f`: 5 breaking - **2026-01-19** `d5fbaaddfa3e`: 5 breaking, 29 info - **2026-01-15** `50dab84bcf02`: 1 breaking - **2026-01-15** `479ede876c89`: 1 info - **2026-01-15** `07f73f74a61d`: 1 breaking, 1 info - **2026-01-15** `3c88f14db21e`: 6 breaking, 1 warning, 22 info ## Changes - **2026-05-12** `5344c0c93a4c`: 1 breaking, 5 info - added 'unevaluatedProperties' constraint to the request body - added 'unevaluatedProperties' constraint to the response body for the status `200` - added 'unevaluatedProperties' constraint to the response body for the status `400` - added 'unevaluatedProperties' constraint to the response body for the status `401` - added 'unevaluatedProperties' constraint to the response body for the status `422` - added 'unevaluatedProperties' constraint to the `links/allOf[#/components/schemas/FaxLinks]/` response property for the status `200` - **2026-03-04** `2e516ba2383f`: 5 breaking - response property `error_code` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `error_message` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `media_url` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `num_pages` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `price` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - **2026-01-19** `d5fbaaddfa3e`: 5 breaking, 29 info - the response property `error_code` became nullable for the status `200` - the response property `error_message` became nullable for the status `200` - the response property `media_url` became nullable for the status `200` - the response property `num_pages` became nullable for the status `200` - the response property `price` became nullable for the status `200` - added the new optional request property `SipAuthPassword` - added the new optional request property `SipAuthUsername` - added the new optional request property `StatusCallbackEvent` - added the new optional request property `StatusCallbackMethod` - added the new optional request property `StoreMedia` - added the new optional request property `Ttl` - the `Quality` request property default value `fine` was added - added the non-success response with the status `422` - the response property `account_sid` became required for the status `200` - the response property `api_version` became required for the status `200` - the response property `date_created` became required for the status `200` - the response property `date_updated` became required for the status `200` - the response property `direction` became required for the status `200` - the response property `duration` became required for the status `200` - the response property `error_code` became required for the status `200` - the response property `error_message` became required for the status `200` - the response property `from` became required for the status `200` - the response property `links` became required for the status `200` - the response property `links/allOf[#/components/schemas/FaxLinks]/media` became required for the status `200` - the response property `media_sid` became required for the status `200` - the response property `media_url` became required for the status `200` - the response property `num_pages` became required for the status `200` - the response property `price` became required for the status `200` - the response property `price_unit` became required for the status `200` - the response property `quality` became required for the status `200` - the response property `sid` became required for the status `200` - the response property `status` became required for the status `200` - the response property `to` became required for the status `200` - the response property `url` became required for the status `200` - **2026-01-15** `50dab84bcf02`: 1 breaking - request body became required - **2026-01-15** `479ede876c89`: 1 info - request body became optional - **2026-01-15** `07f73f74a61d`: 1 breaking, 1 info - removed the media type `application/json` from the request body - added the media type `application/x-www-form-urlencoded` to the request body - **2026-01-15** `3c88f14db21e`: 6 breaking, 1 warning, 22 info - request body became required - removed the media type `application/x-www-form-urlencoded` from the request body - the `direction` response's property type changed from `string` to no type for status `200` - the `links` response's property type changed from `object` to no type for status `200` - the `quality` response's property type changed from `string` to no type for status `200` - the `status` response's property type changed from `string` to no type for status `200` - removed the optional property `links/media` from the response with the `200` status - added the media type `application/json` to the request body - added the non-success response with the status `400` - added the non-success response with the status `401` - added `#/components/schemas/FaxDirection` to the `direction` response property `allOf` list for the response status `200` - added `#/components/schemas/FaxLinks` to the `links` response property `allOf` list for the response status `200` - added `#/components/schemas/FaxQuality` to the `quality` response property `allOf` list for the response status `200` - added `#/components/schemas/FaxStatus` to the `status` response property `allOf` list for the response status `200` - removed the `busy` enum value from the `status` response property for the response status `200` - removed the `canceled` enum value from the `status` response property for the response status `200` - removed the `delivered` enum value from the `status` response property for the response status `200` - removed the `failed` enum value from the `status` response property for the response status `200` - removed the `fine` enum value from the `quality` response property for the response status `200` - removed the `inbound` enum value from the `direction` response property for the response status `200` - removed the `no-answer` enum value from the `status` response property for the response status `200` - removed the `outbound` enum value from the `direction` response property for the response status `200` - removed the `processing` enum value from the `status` response property for the response status `200` - removed the `queued` enum value from the `status` response property for the response status `200` - removed the `received` enum value from the `status` response property for the response status `200` - removed the `receiving` enum value from the `status` response property for the response status `200` - removed the `sending` enum value from the `status` response property for the response status `200` - removed the `standard` enum value from the `quality` response property for the response status `200` - removed the `superfine` enum value from the `quality` response property for the response status `200` --- [Operation](https://skmtc.dev/signalwire/apis/compatibility-api/docs/Accounts/:AccountSid/Faxes/post.md) - [API](https://skmtc.dev/signalwire/apis/compatibility-api.md) - [Page](https://skmtc.dev/signalwire/apis/compatibility-api/changes/Accounts/:AccountSid/Faxes/post)