---
title: "Start Segment Endpoint"
method: POST
path: "/api/agent-chat/segments/{segment_id}/start"
tags: ["Agent Chat"]
---

# Start Segment Endpoint

`POST /api/agent-chat/segments/{segment_id}/start`

Re-enable a campaign that was stopped via /stop — the status-aware
inverse, so a re-checked campaign actually resumes whatever it was doing:
  • listening  → resume (→ outreach), gated by the affordability check;
  • review     → un-freeze the auto-approve countdown (fresh window);
  • discovery  → re-kick the discovery pipeline (idempotent).
Already-running (outreach) / terminal (archived) / error → no-op.

Thin adapter: the orchestration lives in segment_control.start_campaign
(shared with the public API); this endpoint only translates the cookie
session into an org_id and maps domain errors to HTTP.

## Path parameters

- `segment_id` string, required

## Cookies

- `ex_access` string, nullable
- `ex_org` string, nullable

## Response `200`

Successful Response

- unknown

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.dev/explee/apis/explee-api.md) · [All operations](https://skmtc.dev/explee/apis/explee-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/explee/explee-api/revisions/f169bc6e9447/schema)