> For the complete documentation index, see [llms.txt](https://specification.dm3.network/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://specification.dm3.network/protocol-extensions.md).

# Protocol Extensions

- [Billboard Message Protocol (DM3BMP)](https://specification.dm3.network/protocol-extensions/billboard-message-protocol-dm3bmp.md)
- [Architecture](https://specification.dm3.network/protocol-extensions/billboard-message-protocol-dm3bmp/architecture.md)
- [Billboard Node](https://specification.dm3.network/protocol-extensions/billboard-message-protocol-dm3bmp/billboard-node.md)
- [Billboard Service API](https://specification.dm3.network/protocol-extensions/billboard-message-protocol-dm3bmp/billboard-service-api.md)
- [Embedded Widget](https://specification.dm3.network/protocol-extensions/billboard-message-protocol-dm3bmp/embedded-widget.md)
- [Linked Profiles (DM3LPP)](https://specification.dm3.network/protocol-extensions/linked-profiles-dm3lpp.md): (beta - in work)
- [Profile Links](https://specification.dm3.network/protocol-extensions/linked-profiles-dm3lpp/profile-links.md)