curl --request PUT \
  --url https://api.withallo.com/v2/api/crm/people/{id} \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "job_title": "CTO",
  "custom_attributes": {
    "lead_source": "Referral"
  }
}
'

import requests

url = "https://api.withallo.com/v2/api/crm/people/{id}"

payload = {
    "job_title": "CTO",
    "custom_attributes": { "lead_source": "Referral" }
}
headers = {
    "Authorization": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PUT',
  headers: {Authorization: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({job_title: 'CTO', custom_attributes: {lead_source: 'Referral'}})
};

fetch('https://api.withallo.com/v2/api/crm/people/{id}', 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.withallo.com/v2/api/crm/people/{id}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PUT",
  CURLOPT_POSTFIELDS => json_encode([
    'job_title' => 'CTO',
    'custom_attributes' => [
        'lead_source' => 'Referral'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: <api-key>",
    "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.withallo.com/v2/api/crm/people/{id}"

	payload := strings.NewReader("{\n  \"job_title\": \"CTO\",\n  \"custom_attributes\": {\n    \"lead_source\": \"Referral\"\n  }\n}")

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

	req.Header.Add("Authorization", "<api-key>")
	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.put("https://api.withallo.com/v2/api/crm/people/{id}")
  .header("Authorization", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"job_title\": \"CTO\",\n  \"custom_attributes\": {\n    \"lead_source\": \"Referral\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.withallo.com/v2/api/crm/people/{id}")

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

request = Net::HTTP::Put.new(url)
request["Authorization"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"job_title\": \"CTO\",\n  \"custom_attributes\": {\n    \"lead_source\": \"Referral\"\n  }\n}"

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

{
  "data": {
    "id": "per-abc123",
    "name": "John",
    "last_name": "Doe",
    "job_title": "CEO",
    "website": "https://example.com",
    "address": "123 Main St",
    "numbers": [
      "+33612345678"
    ],
    "emails": [
      "[email protected]"
    ],
    "company": {
      "id": "com-xyz789",
      "name": "Acme Corp"
    },
    "interactions": 5,
    "last_activity_at": "2026-04-28T10:30:00",
    "created_at": "2026-04-01T09:00:00",
    "updated_at": "2026-04-28T10:30:00",
    "custom_attributes": {
      "lead_source": "Webinar",
      "budget": 5000
    }
  }
}

{
  "error": {
    "type": "<string>",
    "code": "<string>",
    "message": "<string>",
    "retryable": true,
    "request_id": "<string>",
    "retry_after_seconds": 123
  }
}

{
  "error": {
    "type": "<string>",
    "code": "<string>",
    "message": "<string>",
    "retryable": true,
    "request_id": "<string>",
    "retry_after_seconds": 123
  }
}

{
  "error": {
    "type": "<string>",
    "code": "<string>",
    "message": "<string>",
    "retryable": true,
    "request_id": "<string>",
    "retry_after_seconds": 123
  }
}

{
  "error": {
    "type": "<string>",
    "code": "<string>",
    "message": "<string>",
    "retryable": true,
    "request_id": "<string>",
    "retry_after_seconds": 123
  }
}

{
  "error": {
    "type": "<string>",
    "code": "<string>",
    "message": "<string>",
    "retryable": true,
    "request_id": "<string>",
    "retry_after_seconds": 123
  }
}