# Page Not Found

The URL `additional-resources/validation-tool` does not exist.

You might be looking for one of these pages:
- [Self-Certification Tool](https://docs.octo.travel/additional-resources/self-certification-tool.md)
- [Postman Collections](https://docs.octo.travel/additional-resources/postman-collections.md)
- [Known Implementations](https://docs.octo.travel/additional-resources/known-implementations.md)
- [Slack Workspace](https://docs.octo.travel/additional-resources/slack-workspace.md)
- [Availability](https://docs.octo.travel/octo-api-core/availability.md)

## How to find the correct page

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

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/additional-resources/self-certification-tool.md`)
- Use `Accept: text/markdown` header for content negotiation