curl --request POST \
  --url https://api.voice.mergenlab.ai/v1/dialer/lists/{id}/contacts \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "contacts": [
    {
      "to": "+919876543212",
      "name": "Amit Kumar",
      "fields": {
        "loan_id": "CF-LN-208899"
      }
    }
  ]
}
'

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    contacts: [{to: '+919876543212', name: 'Amit Kumar', fields: {loan_id: 'CF-LN-208899'}}]
  })
};

fetch('https://api.voice.mergenlab.ai/v1/dialer/lists/{id}/contacts', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.voice.mergenlab.ai/v1/dialer/lists/{id}/contacts"

payload = { "contacts": [
        {
            "to": "+919876543212",
            "name": "Amit Kumar",
            "fields": { "loan_id": "CF-LN-208899" }
        }
    ] }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)