## Cancel flow runs

`DELETE POST /cancel-flow-runs`

Cancels all active Workflow runs for the given contact. Safe to call when the contact has no active runs. `POST` is accepted as an alias for clients that cannot send `DELETE` with a body.

### Request body

- `phoneNumber` (string, required) — The contact's phone number. Cancels all of this contact's active Workflow runs. Accepts many formats — normalized to E.164.

**Request — cURL**

```bash
curl -X DELETE https://api.tryprojectblue.com/cancel-flow-runs \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "phoneNumber": "+16025551234"
  }'
```

**Response — 200 OK**

```json
{
  "success": true,
  "cancelled": 1
}
```