How do I integrate Fourth API with my application?

Apideck provides a unified HRIS API that makes Fourth integration simple. Sign up for free, enable Fourth in your dashboard, and use our Vault component to let your users connect their Fourth accounts. We handle OAuth authentication, token refresh, and data normalization automatically.

What Fourth data can I access through Apideck?

Our Fourth integration supports 3+ data models including employees, divisions, and absences. You can perform read and write operations through our unified API, working with the same code structure across all hris platforms.

How does Fourth authentication work with Apideck?

Apideck's Vault handles Fourth authentication completely. Your users connect their Fourth accounts through our secure, white-label UI. We manage OAuth tokens, automatic refresh, and credential storage, so you never have to implement Fourth's auth flow yourself.

Does Apideck support Fourth webhooks?

Yes, Apideck provides real-time notifications when Fourth data changes. Our unified webhook system normalizes events across all integrations, so you handle Fourth events with the same code you use for other hris platforms.

Why use Apideck instead of Fourth's direct API?

Using Apideck's unified API instead of Fourth's direct API saves significant development time. You get normalized data models, automatic auth handling, and the same integration code works with 200+ other apps. When Fourth updates their API, we handle the changes so your integration keeps working.

How quickly can I build a Fourth integration?

Most developers ship a working Fourth integration within a day using Apideck. Sign up for a free trial (no credit card required), enable Fourth, and make your first API call within minutes. Our SDKs for Node.js, Python, and other languages make implementation straightforward.

Fourth HRIS API integration

Build Fourth HRIS integrations in minutes, not months. One API to sync permissioned hris data with Fourth and 55+ other apps.

3+ data models

SOC 2 certified

Free trial

Real-time webhooks

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Integration Guide

How to integrate Fourth API in 3 steps

Build a production-ready Fourth HRIS API integration in minutes, not months. No OAuth headaches, no maintenance burden.

Step 01

Create your Apideck account

Start your free trial
2,500 API calls included
No credit card required

Step 02

Connect Fourth via Vault

Use our pre-built Vault component to let your users securely connect their Fourth account. We handle OAuth, token refresh, and credential storage.

White-label auth UI
Automatic token refresh
SOC 2 certified storage

Step 03

Start syncing hris data

Make API calls to read and write hris data from Fourth. Use the same code to connect 200+ other apps.

Normalized data models
Real-time webhooks
Full CRUD support

Start Fourth integration

Free trial • No credit card required • Setup in under 5 minutes

Code Example

Fourth API integration code

Integrate Fourth with just a few lines of code. Our unified HRIS API normalizes data across 200+ integrations, so you write once and connect everywhere.

Normalized responses — same data structure for all hris apps
Official SDKs — Node.js, Python, and more with TypeScript support
Full documentation — interactive API reference with Fourth-specific examples

View Fourth API documentation →

import { Apideck } from '@apideck/node'

const apideck = new Apideck({
  apiKey: process.env.APIDECK_API_KEY,
  appId: process.env.APIDECK_APP_ID,
  consumerId: 'user-123'
})

// List employees from Fourth
const { data } = await apideck.hris.employeesAll({
  serviceId: 'fourth'
})

console.log(`Found ${data.length} employees`)

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Why integrate Fourth with Apideck?

Build a production-ready Fourth integration with enterprise-grade reliability

Ship Fourth integration fast

Go live with Fourth in days, not months. Our unified HRIS API handles authentication, data normalization, and error handling so your team can focus on building features.

3+ Fourth data models

Access 3+ data models for Fourth including employees. Read and write data through a single standardized API.

Real-time webhook coverage

Keep your product synchronized with Fourth using webhooks. Receive push updates for invoices, customers, payments, and more without polling.

API Resources

Push and pull Fourth data

Use our Unify API to get real-time data from Fourth

Technical Specifications

Fourth API integration details

Everything you need to know about integrating Fourth through our unified HRIS API.

Authentication

Basic Auth

Username/password authentication

Data Models

3+ resources

Access 3+ normalized data models

Webhooks

Virtual webhooks

Real-time data sync on changes

Security

SOC 2 Type II

Enterprise-grade security certified

Token Management

Automatic refresh

Never worry about expired tokens

API Format

REST + JSON

Standard REST API with JSON responses

Fourth direct API vs Apideck unified API

Feature	Direct Fourth API	Apideck Unified API
OAuth implementation	Build from scratch	Handled by Vault
Token refresh	Manual handling	Automatic
Data normalization	Fourth format only	Normalized across 200+ apps
Error handling	Platform-specific	Unified error codes
Rate limit management	DIY implementation	Built-in throttling
Maintenance	Ongoing updates required	We handle API changes
Additional integrations	Separate work each	Same code, 200+ apps