> ## Documentation Index
> Fetch the complete documentation index at: https://developer.jtl-software.com/llms.txt
> Use this file to discover all available pages before exploring further.

# ERP (JTL-Wawi)

> REST and GraphQL access to JTL-Wawi business data

The ERP API lets you read and manipulate data in JTL-Wawi: orders, products, customers, invoices, inventory, and more. It is available as a REST API (all versions) and, starting with v2.0, as a GraphQL API.

<CardGroup cols={2}>
  <Card title="Integration Overview" icon="building" href="/guides/erp-integration/integration-overview">
    Auth, headers, deployment variants, and how to make your first call.
  </Card>

  <Card title="GraphQL Playground" icon="share-2" href="/api-reference/graphql-playground">
    Available in v2.0. Browse the schema and run queries interactively.
  </Card>
</CardGroup>

## OpenAPI Spec

Download the spec for any supported version. Import into Postman, Insomnia, or generate a client.

| Version | Status              | Spec                               |
| ------- | ------------------- | ---------------------------------- |
| v2.1    | Latest, recommended | [Download JSON](/openapi/2.1.json) |
| v2.0    | Supported           | [Download JSON](/openapi/2.0.json) |
| v1.4    | Supported           | [Download JSON](/openapi/1.4.json) |
| v1.3    | Supported           | [Download JSON](/openapi/1.3.json) |
| v1.2    | Supported           | [Download JSON](/openapi/1.2.json) |
| v1.1    | Supported           | [Download JSON](/openapi/1.1.json) |
| v1.0    | Supported           | [Download JSON](/openapi/1.0.json) |