> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://api.lemmy.be/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://api.lemmy.be/_mcp/server.

# Introduction

The Lemmy API lets you integrate any external system — logistics, transport, planning,
project management, e-commerce, PIM, and more — directly with your Lemmy ERP. Read your
master data out of Lemmy, and push new customers, orders, and quotes back in, so every
connected system stays in sync.

## What you can do

#### Customers

Read customer groups and customers, and create new customers, contacts, and delivery addresses.

#### Catalog

Pull your product catalog, product groups, web groups, and GS1 product data.

#### Orders & quotes

Read existing orders and quotes, and submit new ones into Lemmy.

#### Reference data

Look up VAT percentages and other shared reference values.

## How the API works

The Lemmy API is a REST API that returns JSON. A few things to know up front:

* **Base URL:** `https://app.inmotionsoftware.be/Lemmy_API_IS/rest/v1`
* **Authentication:** every request requires an API key in the `x-api-key` header, plus an
  `x-company-id` header that identifies your company. See [Authentication](/authentication).
* **Pagination:** list endpoints are paged using request headers, returning a maximum of
  50 records per request. See [Pagination](/pagination).

## Test environment

A test environment is available on request. Once Lemmy sets it up for you, you'll receive
**a separate API key and company ID**, and you'll send your requests to a
different base URL:

```
https://test.inmotionsoftware.be/Lemmy_API_IS/rest/v1
```

To request a test environment, contact the [Lemmy service desk](mailto:support@lemmy.be).

## Get started

#### [Authenticate](/authentication)

Set up your API key and company ID so your requests are accepted.

#### [Quickstart](/quickstart)

Make your first request and read live data from Lemmy.

Generate your API key yourself in In-Motion Online under **Configuratie → Integraties →
API Keys**. For any other integration questions, reach us at
[support@lemmy.be](mailto:support@lemmy.be).