> 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

Find shared reference data, sandbox test inputs, troubleshooting guidance, operational tools, and documentation updates.

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.