curl --request POST \
  --url https://app.yampi.ai/api/v1/accounts/{account_id}/actions/contact_merge \
  --header 'Content-Type: application/json' \
  --header 'api_access_token: <api-key>' \
  --data '
{
  "base_contact_id": 1,
  "mergee_contact_id": 2
}
'

const options = {
  method: 'POST',
  headers: {api_access_token: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({base_contact_id: 1, mergee_contact_id: 2})
};

fetch('https://app.yampi.ai/api/v1/accounts/{account_id}/actions/contact_merge', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://app.yampi.ai/api/v1/accounts/{account_id}/actions/contact_merge"

payload = {
    "base_contact_id": 1,
    "mergee_contact_id": 2
}
headers = {
    "api_access_token": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

{
  "id": 123,
  "payload": [
    {
      "additional_attributes": {},
      "availability_status": "<string>",
      "email": "<string>",
      "id": 123,
      "name": "<string>",
      "phone_number": "<string>",
      "blocked": true,
      "identifier": "<string>",
      "thumbnail": "<string>",
      "custom_attributes": {
        "attribute_key": "attribute_value",
        "signed_up_at": "dd/mm/yyyy"
      },
      "last_activity_at": 123,
      "created_at": 123,
      "contact_inboxes": [
        {
          "source_id": "<string>",
          "inbox": {
            "id": 123,
            "avatar_url": "<string>",
            "channel_id": 123,
            "name": "<string>",
            "channel_type": "<string>",
            "provider": "<string>"
          }
        }
      ]
    }
  ]
}

{
  "description": "<string>",
  "errors": [
    {
      "field": "<string>",
      "message": "<string>",
      "code": "<string>"
    }
  ]
}

{
  "description": "<string>",
  "errors": [
    {
      "field": "<string>",
      "message": "<string>",
      "code": "<string>"
    }
  ]
}

{
  "description": "<string>",
  "errors": [
    {
      "field": "<string>",
      "message": "<string>",
      "code": "<string>"
    }
  ]
}