curl --request PATCH \
  --url https://api.teamfollowup.ai/api/native-contacts/{contactId} \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
  "lastName": "Diaz-Moreno",
  "customFields": {
    "budget": "6000"
  }
}'

import requests

url = "https://api.teamfollowup.ai/api/native-contacts/{contactId}"

payload = {
    "lastName": "Diaz-Moreno",
    "customFields": { "budget": "6000" }
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PATCH',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({lastName: 'Diaz-Moreno', customFields: {budget: '6000'}})
};

fetch('https://api.teamfollowup.ai/api/native-contacts/{contactId}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.teamfollowup.ai/api/native-contacts/{contactId}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PATCH",
  CURLOPT_POSTFIELDS => json_encode([
    'lastName' => 'Diaz-Moreno',
    'customFields' => [
        'budget' => '6000'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.teamfollowup.ai/api/native-contacts/{contactId}"

	payload := strings.NewReader("{\n  \"lastName\": \"Diaz-Moreno\",\n  \"customFields\": {\n    \"budget\": \"6000\"\n  }\n}")

	req, _ := http.NewRequest("PATCH", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.patch("https://api.teamfollowup.ai/api/native-contacts/{contactId}")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"lastName\": \"Diaz-Moreno\",\n  \"customFields\": {\n    \"budget\": \"6000\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.teamfollowup.ai/api/native-contacts/{contactId}")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Patch.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"lastName\": \"Diaz-Moreno\",\n  \"customFields\": {\n    \"budget\": \"6000\"\n  }\n}"

response = http.request(request)
puts response.read_body

{
  "success": true,
  "data": {
    "_id": "nct_0123456789abcdef0123",
    "locationId": "nat_fd9e2a8dd4be4396b604",
    "firstName": "Ana",
    "lastName": "Diaz",
    "email": "ana@example.com",
    "phone": "+13125550142",
    "timezone": "America/Chicago",
    "address1": "400 W Erie St",
    "city": "Chicago",
    "state": "IL",
    "postalCode": "60654",
    "customFields": {
      "service_needed": "Implants",
      "budget": "4000"
    },
    "doNotCall": false,
    "source": "api",
    "callCount": 2,
    "lastOutcome": "TRANSFER",
    "createdAt": "2026-09-18T14:02:11.000Z",
    "updatedAt": "2026-09-20T09:14:52.000Z"
  }
}

{
  "success": false,
  "error": "A phone number is required."
}

{
  "success": false,
  "error": "Unauthorized"
}

{
  "success": false,
  "error": "You do not have access to this sub-account."
}

{
  "success": false,
  "error": "Contact not found."
}

{
  "success": false,
  "error": "TooManyRequests"
}

{
  "success": false,
  "error": "Contacts request failed."
}