Haufe x360 Orders Endpoint Finally Tamed!

Connecting to the “SalesOrders” endpoint of the Haufe x360 API turned out to be significantly more complex than expected. In particular, the OAuth authorization and the overloaded documentation proved to be time-consuming and nerve-racking.

Relevance for IT managers and EDI teams:
Anyone who wants to integrate Haufe x360 into their EDI or API landscape cannot avoid this challenge. The Orders endpoint is central – but hardly usable without deep technical understanding.

360 SalesOrders API – Core Components and Integration
The Haufe x360 API is REST-based and generally well-structured. Nevertheless, there are several stumbling blocks in practical implementation, particularly with the Orders endpoint, which is crucial for automated order intake.

Swagger file as the central foundation
The Swagger file (OpenAPI Spec) is the key to integrating the Haufe x360 API into a system such as Seeburger BIS or another iPaaS.

It enables:

• Automatic generation of REST endpoints

• Full import of all relevant structures into the mapping tool

• A significant reduction in manual work when setting up the interface

Challenge: The file was neither prominently linked nor easy to find. Only through targeted research, including the use of ChatGPT, could the correct Swagger file be extracted from the documentation. Without this step, automated integration would have been practically impossible.

OAuth implementation – fragile and inflexible

The authentication mechanism via OAuth 2.0 is standard but in Haufe’s implementation is sensitive and not very fault-tolerant.

Practical observations:

• Callback URIs must apparently be lowercase

• Error messages for auth errors are unspecific

• Trial-and-error was necessary to achieve functioning token handling

SalesOrders endpoint – oversized and poorly documented

The SalesOrders API offers a wide range of fields – for virtually any conceivable order situation. What’s missing, however, is a minimally valid request example.

Observation from practice:

• The API documentation lists all fields but without example requests

• Without community contributions, especially in the Automatica forum, the structure of a “minimal order” would have been almost impossible to reconstruct

• The actual payload for a valid order is significantly leaner than the specification suggests

Benefits for integration teams

Time savings through structured API generation
The correct Swagger file provides a clean starting point for REST integration. This eliminates the need for manually creating mappings, which is critical for complex APIs like x360.

Scalability and future readiness
With a working Orders integration, the foundation is laid. Other endpoints such as “Customers,” “Items,” or “Invoices” can now be connected more easily based on the existing authentication and Swagger structure.

Knowledge building within the team
Despite the hurdles, working with the API was instructive. In particular, dealing with generic documentation, authentication mechanisms, and Haufe x360’s own logic provides valuable lessons for similar projects.

Use case: Connecting Haufe x360 to ERP via Seeburger BIS

The goal was to integrate customer orders from a major client into Haufe x360 via BIS.

Approach:

• Obtained and imported the Swagger file, generated REST endpoints in BIS

• Configured OAuth connection, tested multiple auth flows

• Sent test orders with minimal payload manually via Postman

• Configured automated test orders via BIS

Result:

• First test orders successfully transmitted

• Responses correctly evaluated

• Error handling in BIS adapted to specific HTTP status codes

Lessons learned:

• Integration is possible, but only with technical depth and community knowledge

• Documentation alone is not enough – practical examples and tryouts are absolutely necessary

Summary & recommendation

Key takeaways:

• Without the Swagger file, structured integration of the x360 API is hardly feasible

• OAuth implementation requires patience and a delicate touch

• The Orders endpoint is overloaded, but manageable with minimal requests

• Community forums like Automatica are often more helpful than the official documentation

Recommendation for IT management and EDI leads:

Plan sufficient technical resources if you want to integrate x360. The API is powerful but usable only with solid understanding.

Call to action:

If you need support in integrating Haufe x360 – whether via BIS, REST, or in hybrid EDI/API scenarios – contact us. We have already solved these challenges.