# Page Not Found

The URL `reference/attachment-types` does not exist.

You might be looking for one of these pages:
- [Attachment Types](https://rest-api.symphony.com/main/messages/attachment-types.md)
- [Attachment](https://rest-api.symphony.com/main/messages/attachment.md)
- [List Certificate Types](https://rest-api.symphony.com/main/certificates/list-certificate-types.md)
- [List Apps](https://rest-api.symphony.com/main/apps-entitlements/list-app-entitlements.md)
- [Manage Apps](https://rest-api.symphony.com/main/manage-apps.md)

## How to find the correct page

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

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/main/messages/attachment-types.md`)
- Use `Accept: text/markdown` header for content negotiation