# Page Not Found

The URL `zapp/authentication` does not exist.

You might be looking for one of these pages:
- [Authentication](https://userguide.zappost.com/zap-api/authentication.md)
- [Authentication](https://userguide.zappost.com/zap-post-web-app/zap-post-user-guide/zapp/authentication.md)
- [ZAP-POST API Documentation](https://userguide.zappost.com/zap-api/zap-post-api-documentation.md)
- [ZAP-POST Integrations](https://userguide.zappost.com/zap-integrations/zap-post-integrations.md)
- [API Endpoints](https://userguide.zappost.com/zap-api/api-endpoints.md)

## How to find the correct page

1. **Browse the full index**: [/sitemap.md](https://userguide.zappost.com/sitemap.md) - Complete documentation index
2. **View the full content**: [/llms-full.txt](https://userguide.zappost.com/llms-full.txt) - Full content export

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/zap-api/authentication.md`)
- Use `Accept: text/markdown` header for content negotiation