--- title: "Changes to Create a Message" method: POST path: "/Accounts/{AccountSid}/Messages" --- # Changes to Create a Message `POST /Accounts/{AccountSid}/Messages` > Every recorded change to this operation, newest first. ## Timeline Changed in 11 of 47 revisions. - **2026-05-12** `2916d5e3072e`: 5 breaking, 6 info - **2026-05-12** `5344c0c93a4c`: 1 breaking, 5 info - **2026-03-04** `2e516ba2383f`: 6 breaking - **2026-01-20** `dce1bcef69f0`: 1 info - **2026-01-19** `d5fbaaddfa3e`: 5 breaking, 2 warning, 6 info - **2026-01-15** `50dab84bcf02`: 1 breaking - **2026-01-15** `479ede876c89`: 1 info - **2026-01-15** `07f73f74a61d`: 1 breaking, 1 info - **2026-01-15** `6b2611cfa74b`: 2 breaking - **2026-01-15** `686ef84c2abc`: 3 breaking, 2 info - **2026-01-15** `3c88f14db21e`: 6 breaking, 1 warning, 18 info ## Changes - **2026-05-12** `2916d5e3072e`: 5 breaking, 6 info - added `#/components/schemas/uuid` to the `ApplicationSid` request property `allOf` list - added `#/components/schemas/uuid` to the `MessagingServiceSid` request property `allOf` list - the `account_sid` response's property type changed from `string` to no type, and format from `uuid` to no format for status `201` - the `messaging_service_sid` response's property format changed from `uuid` to no format for status `201` - the `sid` response's property type changed from `string` to no type, and format from `uuid` to no format for status `201` - the `ApplicationSid` request property type was generalized from `string` to no type, and format from `uuid` to no format - the `MessagingServiceSid` request property type was generalized from `string` to no type, and format from `uuid` to no format - added `#/components/schemas/uuid` to the `account_sid` response property `allOf` list for the response status `201` - added `#/components/schemas/uuid` to the `sid` response property `allOf` list for the response status `201` - added `#/components/schemas/uuid` to the `messaging_service_sid` response property `anyOf` list for the response status `201` - removed `subschema #1` from the `messaging_service_sid` response property `anyOf` list for the response status `201` - **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 `201` - 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 `subresource_uris/allOf[#/components/schemas/MessageSubresourceUris]/` response property for the status `201` - **2026-03-04** `2e516ba2383f`: 6 breaking - response property `body` list-of-types was widened by adding types `null` to media type `application/json` of response `201` - response property `date_sent` list-of-types was widened by adding types `null` to media type `application/json` of response `201` - response property `error_code` list-of-types was widened by adding types `null` to media type `application/json` of response `201` - response property `error_message` list-of-types was widened by adding types `null` to media type `application/json` of response `201` - response property `messaging_service_sid` list-of-types was widened by adding types `null` to media type `application/json` of response `201` - response property `price` list-of-types was widened by adding types `null` to media type `application/json` of response `201` - **2026-01-20** `dce1bcef69f0`: 1 info - added the non-success response with the status `400` - **2026-01-19** `d5fbaaddfa3e`: 5 breaking, 2 warning, 6 info - added the pattern `^\d+\.?\d{0,4}$` to the request property `MaxPrice` - the `ApplicationSid` request property format changed from no format to `uuid` - the `MessagingServiceSid` request property format changed from no format to `uuid` - the `StatusCallback` request property format changed from no format to `uri` - removed the success response with the status `200` - the `ValidityPeriod` request property's max was set to `172800.00` - the `ValidityPeriod` request property's min was set to `1.00` - the request property `Body` became optional - the request property `From` became optional - request property `MediaUrl` list-of-types was widened by adding types `array` to media type `application/x-www-form-urlencoded` - added the non-success response with the status `422` - removed the non-success response with the status `400` - added the success response with the status `201` - **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** `6b2611cfa74b`: 2 breaking - the request property `ApplicationSid` became not nullable - the request property `MessagingServiceSid` became not nullable - **2026-01-15** `686ef84c2abc`: 3 breaking, 2 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 `messaging_service_sid` became nullable for the status `200` - the request property `ApplicationSid` became nullable - the request property `MessagingServiceSid` became nullable - **2026-01-15** `3c88f14db21e`: 6 breaking, 1 warning, 18 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 `price` response's property type changed from `integer` to `number`, and format from no format to `float` for status `200` - the `status` response's property type changed from `string` to no type for status `200` - the `subresource_uris` response's property type changed from `object` to no type for status `200` - removed the optional property `subresource_uris/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/MessageDirection` to the `direction` response property `allOf` list for the response status `200` - added `#/components/schemas/MessageStatus` to the `status` response property `allOf` list for the response status `200` - added `#/components/schemas/MessageSubresourceUris` to the `subresource_uris` response property `allOf` list 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 `inbound` enum value from the `direction` response property for the response status `200` - removed the `outbound-api` enum value from the `direction` response property for the response status `200` - removed the `outbound-call` enum value from the `direction` response property for the response status `200` - removed the `outbound-reply` enum value from the `direction` 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 `sent` enum value from the `status` response property for the response status `200` - removed the `undelivered` enum value from the `status` response property for the response status `200` --- [Operation](https://skmtc.dev/signalwire/apis/compatibility-api/docs/Accounts/:AccountSid/Messages/post.md) - [API](https://skmtc.dev/signalwire/apis/compatibility-api.md) - [Page](https://skmtc.dev/signalwire/apis/compatibility-api/changes/Accounts/:AccountSid/Messages/post)