curl --request POST \
  --url https://{organization}.rescueconsole.com/api/communications/threads/{id}/merge \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "into_thread_id": "f1e2d3c4-b5a6-4789-9abc-def012345678"
}
'

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({into_thread_id: 'f1e2d3c4-b5a6-4789-9abc-def012345678'})
};

fetch('https://{organization}.rescueconsole.com/api/communications/threads/{id}/merge', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://{organization}.rescueconsole.com/api/communications/threads/{id}/merge"

payload = { "into_thread_id": "f1e2d3c4-b5a6-4789-9abc-def012345678" }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

{
  "messages": [
    {
      "id": "<string>",
      "direction": "inbound",
      "from_address": "<string>",
      "from_name": "<string>",
      "to_addresses": [
        "<string>"
      ],
      "cc_addresses": [
        "<string>"
      ],
      "subject": "<string>",
      "body_text": "<string>",
      "body_html": "<string>",
      "has_html": true,
      "authentication": {
        "spf": "<string>",
        "dkim": "<string>",
        "dmarc": "<string>"
      },
      "attachments": [
        {
          "file_id": "<string>",
          "filename": "<string>",
          "content_type": "<string>",
          "size": 123
        }
      ],
      "received_at": "2023-11-07T05:31:56Z"
    }
  ],
  "links": [
    {
      "id": "<string>",
      "entity_type": "person",
      "entity_id": "<string>",
      "source": "<string>",
      "is_confirmed": true,
      "confirmed_at": "<string>",
      "confirmed_by_person_id": "<string>",
      "created_at": "2023-11-07T05:31:56Z",
      "entity_label": "<string>"
    }
  ],
  "id": "<string>",
  "inbox_id": "<string>",
  "inbox_name": "<string>",
  "inbox_display_name": "<string>",
  "subject": "<string>",
  "status": "open",
  "assigned_person_id": "<string>",
  "assigned_person_name": "<string>",
  "is_archived": true,
  "archived_at": "<string>",
  "is_unread": true,
  "message_count": 123,
  "last_message_at": "2023-11-07T05:31:56Z",
  "last_from": "<string>",
  "last_direction": "<string>",
  "last_snippet": "<string>",
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z"
}

{
  "error": "house_trained must be 1, 0 or null (not assessed)"
}

{
  "error": "house_trained must be 1, 0 or null (not assessed)"
}

{
  "error": "house_trained must be 1, 0 or null (not assessed)"
}

{
  "error": "house_trained must be 1, 0 or null (not assessed)"
}

{
  "error": "house_trained must be 1, 0 or null (not assessed)"
}