# Unit4 ERPx REST API

**Canonical:** https://apis.io/apis/unit4/unit4-erpx-rest-api/  
**Provider:** Unit4 — https://apis.io/providers/unit4/  
**Base URL:** https://api.unit4.com  
**Documentation:** https://develop.unit4rd.com/

Unit4 ERPx REST API is one of 2 APIs that [Unit4](https://apis.io/providers/unit4/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include ERP, Financials, HR, Payroll, and Project. The published artifact set on APIs.io includes API documentation, an API reference, authentication docs, rate-limit docs, and a changelog.

Comprehensive REST API for Unit4 ERPx cloud ERP platform covering time and expenses, personnel, payroll, procurement, project management, customers and sales, inventory management, planning, commitment accounting, accounting, and reporting. Supports OAuth 2.0 and machine-to-machine (M2M) authentication via client credentials flow.

## Machine-readable artifacts (7)

- **Documentation** — https://develop.unit4rd.com/erpx/
- **APIReference** — https://develop.unit4cloud.com/erpx/reference/
- **Authentication** — https://develop.unit4rd.com/erpx/auth-security/
- **RateLimits** — https://develop.unit4rd.com/erpx/limits-and-quotas/
- **Versioning** — https://develop.unit4rd.com/erpx/version_deprecation/
- **ChangeLog** — https://develop.unit4rd.com/erpx/version_deprecation/deprecated_endpoints/2026/
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/unit4/refs/heads/main/apis.yml

## Other Unit4 APIs (1)

- [Unit4 Access Point REST API](https://apis.io/apis/unit4/unit4-access-point-rest-api/)

## Tags

ERP, Financials, HR, Payroll, Project, Procurement

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/unit4/unit4-erpx-rest-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/unit4/.