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+---
+slug: "67ff"
+authors: silverpill <silverpill@firemail.cc>
+status: DRAFT
+dateReceived: 2023-09-05
+---
+# FEP-67ff: FEDERATION.md
+
+## Summary
+
+`FEDERATION.md` is a file containing information necessary for achieving interoperability with a federated service. It was originally proposed by Darius Kazemi on SocialHub forum in [Documenting federation behavior in a semi-standard way?](https://socialhub.activitypub.rocks/t/documenting-federation-behavior-in-a-semi-standard-way/453) topic.
+
+## Requirements
+
+The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [RFC-2119](https://tools.ietf.org/html/rfc2119.html).
+
+## Structure
+
+The `FEDERATION.md` file can have arbitrary structure and content. The only requirements are:
+
+- It MUST be a valid Markdown document.
+- It MUST be located in the root of a project's code repository. If project's documentation is located in another place, the `FEDERATION.md` file may contain a link to that location.
+- It SHOULD include a list of implemented federation protocols.
+- It SHOULD include a list of supported Fediverse Enhancement Proposals (FEPs).
+
+## Template
+
+(This section is non-normative.)
+
+```markdown
+# Federation
+
+## Supported federation protocols and standards
+
+- [ActivityPub](https://www.w3.org/TR/activitypub/) (Server-to-Server)
+- [WebFinger](https://webfinger.net/)
+- [Http Signatures](https://datatracker.ietf.org/doc/html/draft-cavage-http-signatures)
+- [NodeInfo](https://nodeinfo.diaspora.software/)
+
+## Supported FEPs
+
+- [FEP-f1d5: NodeInfo in Fediverse Software](https://codeberg.org/fediverse/fep/src/branch/main/fep/f1d5/fep-f1d5.md)
+
+## ActivityPub
+
+<!-- Describe activities and extensions. -->
+
+## Additional documentation
+
+<!-- Add links to documentation pages. -->
+```
+
+## Implementations
+
+- [gathio](https://github.com/lowercasename/gathio/blob/main/FEDERATION.md)
+- [Streams](https://codeberg.org/streams/streams/src/branch/dev/FEDERATION.md)
+- [Smithereen](https://github.com/grishka/Smithereen/blob/master/FEDERATION.md)
+- [Mastodon](https://github.com/mastodon/mastodon/blob/main/FEDERATION.md)
+- [Hometown](https://github.com/hometown-fork/hometown/blob/hometown-dev/FEDERATION.md)
+- [Mitra](https://codeberg.org/silverpill/mitra/src/branch/main/FEDERATION.md)
+- [Emissary](https://github.com/EmissarySocial/emissary/blob/main/FEDERATION.md)
+- [Vervis](https://vervis.peers.community/repos/WvWbo/source/FEDERATION.md)
+
+## References
+
+- [Documenting federation behavior in a semi-standard way?], Darius Kazemi, [Documenting federation behavior in a semi-standard way?](https://socialhub.activitypub.rocks/t/documenting-federation-behavior-in-a-semi-standard-way/453), 2020
+- [RFC-2119] S. Bradner, [Key words for use in RFCs to Indicate Requirement Levels](https://tools.ietf.org/html/rfc2119.html), 1997
+
+## Copyright
+
+CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
+
+To the extent possible under law, the authors of this Fediverse Enhancement Proposal have waived all copyright and related or neighboring rights to this work.