# Page Not Found

The URL `core-concepts/fees` does not exist.

You might be looking for one of these pages:
- [Fees](https://docs.oceanprotocol.com/developers/contracts/fees.md)
- [Roles](https://docs.oceanprotocol.com/developers/contracts/roles.md)
- [Legal Requirements](https://docs.oceanprotocol.com/contribute/legal-reqs.md)
- [Identifiers (DIDs)](https://docs.oceanprotocol.com/developers/identifiers.md)
- [What data is valuable?](https://docs.oceanprotocol.com/data-scientists/data-engineers.md)

## How to find the correct page

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

## Tips for requesting documentation

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