---
title: "Stop participant"
method: POST
path: "/api/v1/initiatives/{id}/participants/{participantId}/stop"
tags: ["Initiatives"]
---

# Stop participant

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

Stop all messaging to one participant and close their conversation. Idempotent and safe — it never sends. Their answers and transcript stay readable.

## Path parameters

- `id` string, required — Initiative id.
- `participantId` string, required — Participant id, as returned when adding or listing.

## Response `200`

Success

- object
  - `stopped` true, required
  - `status` 'ACTIVE' | 'COMPLETED' | 'STOPPED' | 'EXPIRED' | 'FAILED', required — ACTIVE (conversation may still happen), COMPLETED, STOPPED (messaging halted), EXPIRED, or FAILED.

## Other responses

- `400` — Validation failed or the request cannot proceed.
- `401` — Missing, malformed, or revoked API key.
- `404` — The resource does not exist in this organization.
- `409` — Conflicts with the current state (duplicates, wrong lifecycle state).
- `422` — The request is well-formed but semantically invalid.
- `429` — Rate limit exceeded — retry after `Retry-After`.
- `500` — Internal server error.
- `503` — Transient error — retry with a narrower request.

---

[API](https://skmtc.net/useboom/apis/boom-api.md) · [All operations](https://skmtc.net/useboom/apis/boom-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/useboom/boom-api/revisions/00f873e07076/schema)