> For the complete documentation index, see [llms.txt](https://resources.atriptech.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://resources.atriptech.com/api-document/support-and-reference.md).

# Support & Reference

Use this section for shared reference material, troubleshooting, operational tools, and documentation updates.

New to the product? Read [What is Atlas API?](/api-document/what-is-atlas-api.md) for capabilities and integration starting points.

### FAQ

#### Where can I troubleshoot an Atlas API error?

Start with [Error Codes](/api-document/support-and-reference/troubleshooting-and-support/errors-handing.md).

It identifies retry-safe failures, fresh-identifier requirements, and payment states that need order checks.

#### Where can I find Atlas API sandbox test data?

Use [Sandbox Test Data](/api-document/support-and-reference/integration-reference/sandbox-test-data.md).

It provides published test routes, test cards, and shared validation inputs.

#### Where are Atlas API terms and identifier rules defined?

Use [Atlas API concepts](/api-document/support-and-reference/atlas-api-concepts.md) for key terms.

Use [Identifiers](/api-document/product-guides/booking/booking-overview/identifiers.md) for flow mapping, validity periods, and refresh rules.

Start here when you need to:

* find shared values or sandbox test inputs
* troubleshoot an Atlas API error or integration issue
* check FAQs or support paths
* use non-transactional operational tools
* review documentation updates

### Shared reference material

Use [Reference data & sandbox](/api-document/support-and-reference/integration-reference.md) for reference data and sandbox test inputs shared across workflows.

Use [Atlas API concepts](/api-document/support-and-reference/atlas-api-concepts.md) for definitions of flows, identifiers, orders, and webhooks.

### Troubleshooting and support

Use [Troubleshooting & Support](/api-document/support-and-reference/troubleshooting-and-support.md) for FAQs, error codes, and escalation paths.

### Utility and operational tools

Use [Operational utilities](/api-document/support-and-reference/utility-api-overview.md) for balance, email query, route export, and ATRIP token workflows.

### Documentation updates

Use [Atlas API Documentation Updates](/api-document/readme.md) to review major documentation changes and new entry points.

### Need product guidance?

Use [Product Guides](/api-document/product-guides.md) when you need to choose the right booking path or capability.

### Need onboarding guidance?

Use [Integration Guides](/api-document/readme-1.md) for sandbox setup, UAT, and production go-live.