erp4.us integrates with what you already have.
erp4.us is not meant to replace your existing tools. It exposes its data and its actions to work with them.
- business resources exposed by the REST API v1
- 13
- webhook events in the closed catalogue
- 18
- tools exposed to AI agents via the MCP server
- 67
REST API v1
- A versioned REST API (v1) covers the business resources: accounts, contacts, quotes, orders, purchases, manufacturing orders, invoices, tasks, documents, and the reference data (hourly rates, commercial terms…).
- Each access token belongs to a team and carries explicit permissions per resource (read/write).
- Generated OpenAPI documentation, errors in the standard RFC 7807 format, cursor pagination, bulk operations.
Outgoing webhooks
- Your system is notified when something changes: 18 events in the closed catalogue (creation, update, deletion on quotes, orders, invoices, tasks, accounts, contacts).
- Every delivery is signed (HMAC) and can be replayed on failure.
AI agents (MCP)
erp4.us also exposes an MCP server: 67 tools (read and write) allowing an AI agent to look up a quote, create a task or follow an invoice, with the same permissions as the API, idempotency keys on writes and OAuth 2.1 authentication.
To our knowledge, the legacy ERP-MES products of this segment do not offer an equivalent.
Use cases, presented as such: internal estimating assistant, automated quote review, unpaid-invoice follow-up by an agent.
SDKs and documentation
PHP and TypeScript SDKs generated from the specification; API documentation online.
Already equipped with an MES?
Your MES stays in charge of the shop floor (stock, planning, time tracking). erp4.us handles the office — quotes, purchasing, orders, invoicing — and the two systems exchange through the API and webhooks. We study the exchange scope with you during the demo.
A specific integration need?
Bring it to the demo, we’ll answer with the documentation.