curl --request POST \
  --url https://api.sendrealm.com/exports/contacts \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'X-Sendrealm-Project-Id: <x-sendrealm-project-id>' \
  --data '
{
  "limit": 100,
  "after": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "fields": [
    "first_name",
    "last_name"
  ]
}
'

const options = {
  method: 'POST',
  headers: {
    'X-Sendrealm-Project-Id': '<x-sendrealm-project-id>',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    limit: 100,
    after: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    fields: ['first_name', 'last_name']
  })
};

fetch('https://api.sendrealm.com/exports/contacts', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.sendrealm.com/exports/contacts"

payload = {
    "limit": 100,
    "after": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "fields": ["first_name", "last_name"]
}
headers = {
    "X-Sendrealm-Project-Id": "<x-sendrealm-project-id>",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

{
  "status": 123,
  "data": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "email": "jsmith@example.com",
      "fields": {},
      "error_code": "<string>"
    }
  ],
  "metadata": {
    "has_more": true,
    "next": "<string>",
    "limit": 50
  }
}

{
  "status": 123,
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": "<string>",
    "issues": [
      {
        "code": "<string>",
        "path": "<string>",
        "message": "<string>"
      }
    ]
  }
}