ADP Marketplace API

adp.com · Company

Company OAuth2 Paid Financial Services Healthcare Manufacturing HR Payroll Enterprise

REST APIs for ADP payroll and HR platforms — Workforce Now, RUN, and Vantage HCM. Access worker profiles, pay statements, time and attendance, benefits, and tax data. ADP processes payroll for 1 in 6 US workers. Requires ADP customer or marketplace partner status.

Authentication

OAuth2 OAuth2 client credentials with mutual TLS (mTLS). Requires a client certificate issued by ADP. Register at developers.adp.com.

Sample Requests

GET Get workers

Returns worker records including name, department, employment status, and hire date.

https://api.adp.com/hr/v2/workers?$top=25&$skip=0

Hover any highlighted part to learn what it does

Headers — extra info sent with the request

Authorization

Bearer YOUR_ACCESS_TOKEN

curl -X GET "https://api.adp.com/hr/v2/workers?$top=25&$skip=0" \
  -H "Authorization: Bearer YOUR_ACCESS_TOKEN"

import requests
params = {
    "$top": "25",
    "$skip": "0"
}
headers = {
    "Authorization": "Bearer YOUR_ACCESS_TOKEN"
}
response = requests.get(
    "https://api.adp.com/hr/v2/workers",
    params=params,
    headers=headers,
)
print(response.json())

const url = new URL('https://api.adp.com/hr/v2/workers');
url.searchParams.set('$top', '25');
url.searchParams.set('$skip', '0');

const response = await fetch(url, {
  headers: {
    'Authorization': 'Bearer YOUR_ACCESS_TOKEN'
  },
}); 
const data = await response.json();
console.log(data);

package main

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

func main() {
	baseURL, _ := url.Parse("https://api.adp.com/hr/v2/workers")
	q := baseURL.Query()
	q.Set("$top", "25")
	q.Set("$skip", "0")
	baseURL.RawQuery = q.Encode()
	targetURL := baseURL.String()
	req, _ := http.NewRequest("GET", targetURL, nil)
	req.Header.Set("Authorization", "Bearer YOUR_ACCESS_TOKEN")

	client := &http.Client{}
	resp, _ := client.Do(req)
	defer resp.Body.Close()
	body, _ := io.ReadAll(resp.Body)
	fmt.Println(string(body))
}

require "net/http"
require "json"

uri = URI("https://api.adp.com/hr/v2/workers")
uri.query = URI.encode_www_form({
  "$top" => "25",
  "$skip" => "0"
})

http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = uri.scheme == "https"

req = Net::HTTP::Get.new(uri)
req["Authorization"] = "Bearer YOUR_ACCESS_TOKEN"

res = http.request(req)
puts JSON.parse(res.body)

<?php
$url = "https://api.adp.com/hr/v2/workers?" . http_build_query([
    "$top" => "25",
    "$skip" => "0"
]);
$opts = ["http" => [
    "method" => "GET",
    "header" => implode("\r\n", [
        "Authorization: Bearer YOUR_ACCESS_TOKEN"
    ]),
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

Postman Setup Guide

Get Postman ↗

Register at https://developers.adp.com — requires ADP customer or partner agreement
ADP uses OAuth2 with mutual TLS — you need a client certificate from ADP
Download client certificate from ADP Developer portal after registration
In Postman: Settings → Certificates → add your ADP client cert for api.adp.com
Token URL: https://accounts.adp.com/auth/oauth/v2/token
Sandbox available for registered developers at https://iat-api.adp.com
Product-specific base paths: /hr/v2/ (HCM), /payroll/v1/ (payroll data)

What can you build with ADP Marketplace API?

ADP Marketplace API is a Company API. Developers commonly use company APIs for:

enriching CRM records with company firmographics
building lead-generation and prospecting tools
verifying business identity and registration details
monitoring competitors and market intelligence
powering B2B data enrichment pipelines

OAuth 2.0. OAuth lets your app act on behalf of a user. You redirect them to authorise access, receive a token, then use that token in requests. Best for accessing user-owned data. ADP Marketplace API is a paid API — check the provider's pricing page before building a production integration.

New to APIs? Read our beginner's guide · Learn about API keys · What is REST?

Open documentation ↗