---
title: "Changes to Register sender for project"
method: POST
path: "/v1/projects/{projectId}/whatsapp/senders/{senderId}/register"
---

# Changes to Register sender for project

`POST /v1/projects/{projectId}/whatsapp/senders/{senderId}/register`

> Every recorded change to this operation, newest first.
> 17 revisions in range; 1 not diffed.

## Timeline

Changed in 2 of 17 revisions.

- **2026-09-01** `c6a937922d10`: 11 breaking, 31 info
- **2026-08-18** `c78a716de420`: 1 info

## Changes

- **2026-09-01** `c6a937922d10`: 11 breaking, 31 info
  - added `#/components/schemas/WhatsappSenderInputRegistrationMethodEnum` to the `method` request property `allOf` list
  - removed the enum value `SMS` of the request property `method`
  - removed the enum value `VOICE` of the request property `method`
  - the `method` request property type changed from `string` to no type
  - the response's body type changed from no type to `object` for status `400`
  - the response's body type changed from no type to `object` for status `401`
  - the response's body type changed from no type to `object` for status `404`
  - the response's body type changed from no type to `object` for status `409`
  - the response's body type changed from no type to `object` for status `429`
  - the response's body type changed from no type to `object` for status `500`
  - the `method` response's property type changed from `string` to no type for status `200`
  - removed `subschema #1: InvalidInputErrorTitle, subschema #2: ProjectNotInitializedErrorTitle, subschema #3: InvalidPayloadErrorTitle` from the response body `oneOf` list for the response status `400`
  - removed `subschema #1: NotAllowedRegisterErrorTitle, subschema #2: SenderNumberNotApprovedForEnterpriseErrorTitle` from the response body `oneOf` list for the response status `409`
  - removed `subschema #1: SenderRegisterTooManyRequestsErrorTitle, subschema #2: SenderAlreadyRegisteredErrorTitle, subschema #3: TooManyInvalidVerificationCodesErrorTitle` from the response body `oneOf` list for the response status `429`
  - added the optional property `additionalInformation` to the response with the `400` status
  - added the optional property `additionalInformation` to the response with the `401` status
  - added the optional property `additionalInformation` to the response with the `404` status
  - added the optional property `additionalInformation` to the response with the `409` status
  - added the optional property `additionalInformation` to the response with the `429` status
  - added the optional property `additionalInformation` to the response with the `500` status
  - added `#/components/schemas/WhatsappSenderRegistrationMethodEnum` to the `method` response property `allOf` list for the response status `200`
  - the response property `errorCode` became required for the status `401`
  - the response property `errorCode` became required for the status `404`
  - the response property `errorCode` became required for the status `500`
  - the response property `message` became required for the status `401`
  - the response property `message` became required for the status `404`
  - the response property `message` became required for the status `500`
  - the response property `resolution` became required for the status `401`
  - the response property `resolution` became required for the status `404`
  - the response property `resolution` became required for the status `500`
  - removed the `SMS` enum value from the `method` response property for the response status `200`
  - removed the `UNRECOGNIZED` enum value from the `method` response property for the response status `200`
  - removed the `VOICE` enum value from the `method` response property for the response status `200`
  - added the required property `errorCode` to the response with the `400` status
  - added the required property `errorCode` to the response with the `409` status
  - added the required property `errorCode` to the response with the `429` status
  - added the required property `message` to the response with the `400` status
  - added the required property `message` to the response with the `409` status
  - added the required property `message` to the response with the `429` status
  - added the required property `resolution` to the response with the `400` status
  - …2 more
- **2026-08-18** `c78a716de420`: 1 info
  - api operation id `SendersController_register_v1` removed and replaced with `WhatsappSendersController_register_v1`

---

[Operation](https://skmtc.dev/sinch/apis/provisioning-api/docs/v1/projects/:projectId/whatsapp/senders/:senderId/register/post.md) - [API](https://skmtc.dev/sinch/apis/provisioning-api.md) - [Page](https://skmtc.dev/sinch/apis/provisioning-api/changes/v1/projects/:projectId/whatsapp/senders/:senderId/register/post)