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Arcus ERP

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Welcome

The Arcus ERP Public API is a RESTful HTTP API for reading and writing data across every module of the Arcus platform: accounts, orders, products, inventory, fulfillment, purchasing, payments, returns, accounting, and more. The API is the canonical integration layer for:
  • Data migration — import your existing records from a legacy ERP, QuickBooks, or a spreadsheet
  • External integrations — connect your warehouse management system, 3PL, or BI tool
  • Automation — trigger workflows from external events (Zapier, Make, or bespoke scripts)
  • Custom portals — build customer-facing experiences on top of your Arcus data

Quickstart

Send your first request in under 5 minutes.

Authentication

Create an API key and understand scopes.

API Reference

Every endpoint, every parameter, try-it-now.

SDKs

TypeScript, Python, and Go client libraries.

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Design principles

The Arcus API follows the same conventions as Stripe, Plaid, and Shopify. If you have used any of those APIs, you will feel at home immediately.

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Base URL

All requests go to https://api.arcuserp.com/v1. Test mode vs live mode is determined by your API key prefix (ark_test_* for sandbox data, ark_live_* for production data) — no separate URL required.

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Need help?

  • Browse the API Reference for endpoint-level details
  • Read Concepts for deep-dives on pagination, errors, webhooks, and more
  • Contact support via the in-app Help button or the Support page