---
title: "Changes to Add participants"
method: POST
path: "/api/v1/initiatives/{id}/participants"
---

# Changes to Add participants

`POST /api/v1/initiatives/{id}/participants`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 1 of 3 revisions.

- **2026-11-03** `7c7a773b12ce`: 1 breaking, 4 info

## Changes

- **2026-11-03** `7c7a773b12ce`: 1 breaking, 4 info
  - response property `data/items/phoneNumber` list-of-types was widened by adding types `null` to media type `application/json` of response `201`
  - added the new optional request property `environmentId`
  - added the new optional request property `people/items/email`
  - the request property `people/items/phoneNumber` became optional
  - added the required property `data/items/email` to the response with the `201` status

---

[Operation](https://skmtc.dev/useboom/apis/boom-api/docs/api/v1/initiatives/:id/participants/post.md) - [API](https://skmtc.dev/useboom/apis/boom-api.md) - [Page](https://skmtc.dev/useboom/apis/boom-api/changes/api/v1/initiatives/:id/participants/post)