> ## Documentation Index
> Fetch the complete documentation index at: https://doc.haipay.net/llms.txt
> Use this file to discover all available pages before exploring further.

# Merchant Integration Overview

> Explore the core merchant documentation entry points for onboarding, configuration, integration, testing, and go-live preparation.

Core documentation entry points organized around the merchant integration journey, from setup through testing and go-live.

> **[Integration Process](https://doc.haipay.net/en/history/V20260623/get-started/integration-process.md)**
>
> Start with the full onboarding path before implementation and testing begin.

> **[Config & Signature](https://doc.haipay.net/en/history/V20260623/guide/config_settings_and_signature_rules_guide.md)**
>
> Review merchant parameters, signing rules, request format, and key configuration requirements.

> **[Integration Steps](https://doc.haipay.net/en/history/V20260623/get-started/integration-steps.md)**
>
> Follow the implementation sequence for API access, parameter setup, and callback handling.

> **[API Description](https://doc.haipay.net/en/history/V20260623/get-started/api-conventions.md)**
>
> Understand shared fields, common rules, signature logic, and response structures.

> **[End-to-End Testing](https://doc.haipay.net/en/history/V20260623/testing/end-to-end.md)**
>
> Validate the testing flow and confirm the required checks before submission and launch.

> **[Onboarding Checklist](https://doc.haipay.net/en/history/V20260623/testing/go-live-checklist.md)**
>
> Verify production readiness, required materials, and final launch preparation items.

> **[Frequently Asked Questions](https://doc.haipay.net/en/history/V20260623/resources/faq.md)**
>
> Find common errors, configuration questions, and troubleshooting guidance.

> **[Connect to HaiPay MCP](https://doc.haipay.net/en/history/V20260623/resources/ai/connect-ai-via-mcp.md)**
>
> Connect HaiPay Documentation Knowledge Base via HaiPay MCP.

## Related Topics

* [HaiPay Integration Steps Guide](https://doc.haipay.net/en/history/V20260623/get-started/integration-steps.md)
* [HaiPay Payment API Documentation List](https://doc.haipay.net/en/history/V20260623/get-started/documentation-map.md)
* [HaiPay Onboarding Checklist](https://doc.haipay.net/en/history/V20260623/testing/go-live-checklist.md)
* [API Reference Overview](https://doc.haipay.net/en/history/V20260623/api-reference/overview.md)


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