Fedify: ActivityPub server framework

🎉 Excited to announce that #Fedify is now on Open Collective! Support the project's development starting at:

• Backer (from $5/mo)
• Supporter (from $25/mo)
• Sponsor (from $100/mo)
• Corporate Sponsor (from $500/mo)
• Custom donations welcome

Your support will help us maintain and improve Fedify. Check it out here:

https://opencollective.com/fedify

#OpenCollective #support #backing #sponsor #donation

Fedify is an #ActivityPub server framework in #TypeScript & #JavaScript. It aims to eliminate the complexity and redundant boilerplate code when building a federated server app, so that you can focus on your business logic and user experience.

The key features it provides currently are:

• Type-safe objects for Activity Vocabulary (including some vendor-specific extensions)
• #WebFinger client and server
• HTTP Signatures & Linked Data Signatures & Object Integrity Proofs
• Middleware for handling webhooks
• #NodeInfo protocol
• #Node.js, #Deno, and #Bun support
• CLI toolchain for testing and debugging

If you're curious, take a look at the #Fedify website! There's comprehensive docs, a demo, a tutorial, example code, and more:

https://fedify.dev/

The web interface of the fedify inbox command has been slightly updated. This change will be included in the next minor release, Fedify 1.5.0.

@drado_ribeiro @zhanglao acho que a maior vantagem de JS seria usar o Fedify.

Today's my work on #Fedify: Support PEM-PKCS#1 besides PEM-SPKI for RSA public keys.

Although the vast majority of ActivityPub software encodes RSA public keys in PEM-SPKI format, some software encodes RSA public keys in PEM-PKCS#1 format (see: https://github.com/fedify-dev/hollo/pull/109#issuecomment-2662591619). Fedify currently only accepts PEM-SPKI format, so it needs to accept PEM-PKCS#1 format as well for better interoperability.

https://github.com/fedify-dev/fedify/issues/209

📢 Fedifyで独自のフェディバースサーバーを構築しましょう！

FedifyはActivityPubプロトコルの実装を簡単にするTypeScriptフレームワークです。連合プロトコルの複雑な実装に困っていませんか？Fedifyがお手伝いします！

✨ 主な機能

• WebFinger、HTTP Signatures、NodeInfoなど基本プロトコルを完全サポート
• Object Integrity ProofsとLinked Data Signaturesによる様々なフェディバースソフトウェアとの相互運用性
• 型安全なActivity Vocabulary APIで開発ミスを防止
• 自動リトライとメッセージキューによる安定した配信
• OpenTelemetry連携による完全な可観測性
• Redis、PostgreSQL、AMQPなど様々なバックエンドをサポート
• Express、Hono、Fresh、SvelteKitなど人気のWebフレームワークと統合
• 包括的なロギングとトレース機能

🔧 CLIツール

• 一時的なテストインボックスでActivityPubのリアルタイムデバッグ
• lookupツールでActivityPubオブジェクトとアクターを検査
• ローカル開発用のトンネリング機能

🚀 ランタイムサポート

• Deno
• Node.js
• Bun

📚 学習が簡単

• 詳細なドキュメント
• ステップバイステップのチュートリアル
• MatrixとDiscord（日本語対応）によるコミュニティサポート

MITライセンスで自由に利用可能なオープンソースプロジェクトです！

#Fedify #フェディバース #fediverse #fedidev #TypeScript #ActivityPub

📢 여러분만의 #연합우주 서버를 Fedify로 만들어보세요!

Fedify는 #ActivityPub 프로토콜 구현을 도와주는 #TypeScript 프레임워크입니다. 복잡한 연합 프로토콜을 쉽게 구현하고 싶으신가요? Fedify가 도와드립니다!

✨ 주요 기능

• WebFinger, HTTP Signatures, NodeInfo 등 기본 프로토콜 완벽 지원
• Object Integrity Proofs와 Linked Data Signatures를 통한 다양한 페디버스 소프트웨어와의 상호운용성
• 타입 안전한 Activity Vocabulary API로 개발 실수 방지
• 자동 재시도와 메시지 큐를 통한 안정적인 발송
• OpenTelemetry 통합으로 완벽한 모니터링
• Redis, PostgreSQL, AMQP 등 다양한 백엔드 지원
• Express, Hono, Fresh, SvelteKit 등 인기 웹 프레임워크와 통합
• 상세한 로깅과 추적 기능

🔧 CLI 도구

• 임시 테스트 인박스로 ActivityPub 실시간 디버깅
• ActivityPub 객체와 액터 조회를 위한 lookup 도구
• 로컬 개발을 위한 터널링 기능

🚀 런타임 지원

• Deno
• Node.js
• Bun

📚 배우기 쉽습니다

• 상세한 문서
• 따라하기 쉬운 튜토리얼
• Matrix 및 Discord(한국어 대응)를 통한 커뮤니티 지원

오픈소스 #MIT 라이선스로 누구나 자유롭게 사용할 수 있습니다!

#Fedify #fedidev #fediverse

Build your own #fediverse server with #Fedify!

Fedify is a #TypeScript framework that simplifies #ActivityPub implementation. Want to build a federated server without the complexity? Fedify has got you covered!

✨ Key features

• Complete protocol support including WebFinger, HTTP Signatures, and NodeInfo
• Enhanced interoperability with Object Integrity Proofs and Linked Data Signatures
• Type-safe Activity Vocabulary API to prevent development mistakes
• Reliable delivery with automatic retries and message queues
• Full observability through OpenTelemetry integration
• Multiple backend support: Redis, PostgreSQL, AMQP
• Seamless integration with popular web frameworks: Express, Hono, Fresh, SvelteKit
• Comprehensive logging and tracing

🔧 CLI toolchain

• Debug ActivityPub in real-time with ephemeral inbox server
• Inspect ActivityPub objects and actors with lookup tool
• Tunnel your local server for development

🚀 Runtime support

• Deno
• Node.js
• Bun

📚 Easy to learn

• Extensive docs
• Step-by-step tutorials
• Community support via Matrix & Discord

Available under the #MIT license—free and open source!

#fedidev

📢 Fedifyで独自のフェディバースサーバーを構築しましょう！

FedifyはActivityPubプロトコルの実装を簡単にするTypeScriptフレームワークです。連合プロトコルの複雑な実装に困っていませんか？Fedifyがお手伝いします！

✨ 主な機能

• WebFinger、HTTP Signatures、NodeInfoなど基本プロトコルを完全サポート
• Object Integrity ProofsとLinked Data Signaturesによる様々なフェディバースソフトウェアとの相互運用性
• 型安全なActivity Vocabulary APIで開発ミスを防止
• 自動リトライとメッセージキューによる安定した配信
• OpenTelemetry連携による完全な可観測性
• Redis、PostgreSQL、AMQPなど様々なバックエンドをサポート
• Express、Hono、Fresh、SvelteKitなど人気のWebフレームワークと統合
• 包括的なロギングとトレース機能

🔧 CLIツール

• 一時的なテストインボックスでActivityPubのリアルタイムデバッグ
• lookupツールでActivityPubオブジェクトとアクターを検査
• ローカル開発用のトンネリング機能

🚀 ランタイムサポート

• Deno
• Node.js
• Bun

📚 学習が簡単

• 詳細なドキュメント
• ステップバイステップのチュートリアル
• MatrixとDiscord（日本語対応）によるコミュニティサポート

MITライセンスで自由に利用可能なオープンソースプロジェクトです！

#Fedify #フェディバース #fediverse #fedidev #TypeScript #ActivityPub

📢 여러분만의 #연합우주 서버를 Fedify로 만들어보세요!

Fedify는 #ActivityPub 프로토콜 구현을 도와주는 #TypeScript 프레임워크입니다. 복잡한 연합 프로토콜을 쉽게 구현하고 싶으신가요? Fedify가 도와드립니다!

✨ 주요 기능

• WebFinger, HTTP Signatures, NodeInfo 등 기본 프로토콜 완벽 지원
• Object Integrity Proofs와 Linked Data Signatures를 통한 다양한 페디버스 소프트웨어와의 상호운용성
• 타입 안전한 Activity Vocabulary API로 개발 실수 방지
• 자동 재시도와 메시지 큐를 통한 안정적인 발송
• OpenTelemetry 통합으로 완벽한 모니터링
• Redis, PostgreSQL, AMQP 등 다양한 백엔드 지원
• Express, Hono, Fresh, SvelteKit 등 인기 웹 프레임워크와 통합
• 상세한 로깅과 추적 기능

🔧 CLI 도구

• 임시 테스트 인박스로 ActivityPub 실시간 디버깅
• ActivityPub 객체와 액터 조회를 위한 lookup 도구
• 로컬 개발을 위한 터널링 기능

🚀 런타임 지원

• Deno
• Node.js
• Bun

📚 배우기 쉽습니다

• 상세한 문서
• 따라하기 쉬운 튜토리얼
• Matrix 및 Discord(한국어 대응)를 통한 커뮤니티 지원

오픈소스 #MIT 라이선스로 누구나 자유롭게 사용할 수 있습니다!

#Fedify #fedidev #fediverse

Build your own #fediverse server with #Fedify!

Fedify is a #TypeScript framework that simplifies #ActivityPub implementation. Want to build a federated server without the complexity? Fedify has got you covered!

✨ Key features

• Complete protocol support including WebFinger, HTTP Signatures, and NodeInfo
• Enhanced interoperability with Object Integrity Proofs and Linked Data Signatures
• Type-safe Activity Vocabulary API to prevent development mistakes
• Reliable delivery with automatic retries and message queues
• Full observability through OpenTelemetry integration
• Multiple backend support: Redis, PostgreSQL, AMQP
• Seamless integration with popular web frameworks: Express, Hono, Fresh, SvelteKit
• Comprehensive logging and tracing

🔧 CLI toolchain

• Debug ActivityPub in real-time with ephemeral inbox server
• Inspect ActivityPub objects and actors with lookup tool
• Tunnel your local server for development

🚀 Runtime support

• Deno
• Node.js
• Bun

📚 Easy to learn

• Extensive docs
• Step-by-step tutorials
• Community support via Matrix & Discord

Available under the #MIT license—free and open source!

#fedidev

Excited to share that Fedify CLI is now available on Scoop for #Windows users! You can easily install it with scoop install fedify. One more way to get started with #ActivityPub development!

https://github.com/ScoopInstaller/Main/pull/6371

#Fedify #fedidev #Scoop

Love building federated apps with #Fedify? Consider supporting its development! We have tiers starting from just $5/month, and every contribution helps keep the project sustainable.

https://opencollective.com/fedify

Following Mastodon's plan to adopt HTTP Message Signatures (RFC 9421), we will implement the same standard in #Fedify. We'll use “double-knocking” to maintain compatibility with servers using older signature versions (draft-cavage-http-signatures-12).

@fedify

>The primary technique we recommend is double-knocking. First, try generating or verifying an HTTP Signature with one version, ideally (but not necessarily) the latest. If the remote server rejects that signature, eg with an HTTP 401 response, or the incoming signature doesn't verify, try with another version. Repeat until a signature passes or you've tried all supported versions.

Do they recommend making two requests instead of one? This is ridiculous. Today no one supports RFC9421, and everyone supports Draft 12, so there is no reason to try RFC9421 version first. Once RFC9421 is widely supported, we can simply switch to RFC9421.

One can also add a boolean flag to actor document. If supportsRFC9421 is true, inbox deliveries can be signed with RFC9421.

@reiver @andypiper @rwg @andresmh Re: which networks, I haven't personally done any academic research about social platforms. Pondering questions, yes, written anything down, no.

But my FOSS work has been centered on ActivityPub lately: https://fietkau.software/tag/fediverse

I have a project cooking that I think you'll like, for which I'm hoping to run a semi-public alpha test within the next few months. Join the @fedify Matrix room at #fedify-users:matrix.org to witness my implementation struggles. 👍

Following Mastodon's plan to adopt HTTP Message Signatures (RFC 9421), we will implement the same standard in #Fedify. We'll use “double-knocking” to maintain compatibility with servers using older signature versions (draft-cavage-http-signatures-12).

A milestone worth celebrating—#Fedify just hit 100+ releases! From day one, we've been committed to building a robust #ActivityPub framework, and each release has brought us closer to that goal. Here's to many more releases as we continue growing the #fediverse together! #fedidev

We're considering adding custom background task support to #Fedify 1.5.0.

Want to use Fedify's worker system for your own background tasks? We're exploring ways to let you register and process custom tasks alongside #ActivityPub jobs.

Check out the proposal: https://github.com/fedify-dev/fedify/issues/206.

Key considerations:

• Should this be part of Fedify's scope?
• Quick API extension vs complete worker architecture redesign
• Integration with existing task queue systems

We'd love to hear your thoughts! Do you need this feature? How would you use it? Share your feedback in the issue thread.

#fedidev

We're considering adding custom background task support to #Fedify 1.5.0.

Want to use Fedify's worker system for your own background tasks? We're exploring ways to let you register and process custom tasks alongside #ActivityPub jobs.

Check out the proposal: https://github.com/fedify-dev/fedify/issues/206.

Key considerations:

• Should this be part of Fedify's scope?
• Quick API extension vs complete worker architecture redesign
• Integration with existing task queue systems

We'd love to hear your thoughts! Do you need this feature? How would you use it? Share your feedback in the issue thread.

#fedidev

#FediLUG 資料を置きました！

開発用ActivityPubサーバーの構築方法（第7回FediLUG勉強会） | hira / モナコ広告
https://www.docswell.com/s/monaco_koukoku/K7R117-fedilug07-20250209

#FediLUG
6/1の技術書典18＠池袋。OSC名古屋の翌日（！）
Thinking Penguin Magazineと、Fedifyの解説本も頒布予定とのこと

ActivityPubサーバーを作っています
Fedifyを使っている
#FediLUG

Fedify
TSで使用できるフレームワーク
APに基づくリモートサーバーとの通信をやってくれる
#FediLUG

Fedify: https://fedify.dev
BotKit: https://botkit.fedify.dev (Denoオンリー) #FediLUG

Tips: Fedify CLIにはトンネリングの機能がある #FediLUG

Fedifyをちゃんとさわってみたい

Now we have a dedicated #Matrix room for #BotKit (#botkit-users:matrix.org) in the Fedify community (#fedify:matrix.org), so join us!

@atomicpoet

@hongminhee

Just a remember he has an OpenColective for @fedify.

If someone doesn't know, he's doing such a great work that Fedify is the base for Ghost ActivityPub implementation.

https://opencollective.com/fedify

How am I only just learning about / trying out the @fedify CLI? this is wonderful work @hongminhee 👏🏻 https://dev.to/hongminhee/hidden-gems-of-the-fedify-cli-tips-tricks-you-might-have-missed-54af

We're excited to announce the release of Fedify 1.4.0! This release brings significant improvements to enhance compatibility and flexibility in #ActivityPub federation.

Key Highlights

Activity transformers

Introduced a new system to adjust outgoing activities for better compatibility with various ActivityPub implementations. This includes automatic ID assignment for activities and actor dehydration to satisfy implementation quirks (looking at you, Threads!).

WebFinger customization

Added the ability to customize WebFinger responses through the new mapAlias() API, giving you more control over how your actors are discovered.

New interaction collections

Added support for shares, likes, and emojiReactions properties to the Object class, making it easier to access and traverse these interaction collections.

More flexible document/context loader

Document loader and context loader are now configurable through factory functions, giving you more control over how your application handles JSON-LD documents.

CLI improvements

The fedify lookup command now supports two new options:

• -t/--traverse: Traverse through collection objects
• -S/--suppress-errors: Continue operation even when encountering errors during traversal

Other enhancements

• Added Context.getNodeInfo() method for easier NodeInfo access
• Improved error handling in collection traversal and JSON-LD processing
• Added support for private network access control in WebFinger lookups
• User-Agent headers now automatically include your instance URL, making it easier for other servers to identify your instance

For the complete list of changes and bugfixes, please visit our changelog.

Whether you're building a new federated application or maintaining an existing one, #Fedify 1.4.0 provides the tools you need for robust ActivityPub federation.

Supporting us

We're grateful to all our sponsors who make this project possible. Check out our new sponsors showcase page to see the amazing individuals and organizations supporting Fedify's development. If you'd like to support Fedify's development, please consider becoming a sponsor!

Upgrade now

You can install Fedify 1.4.0 from JSR or npm. Upgrade today and let us know what you think!

#fedidev

🎉 Announcing BotKit 0.1.0: A new framework for creating ActivityPub bots!

We're thrilled to announce the initial release of #BotKit, a #TypeScript framework that makes creating standalone #ActivityPub bots simpler than ever before. With BotKit, you can create a complete fediverse bot in just a single TypeScript file!

Key features:

• 🔋 Standalone bot creation—no need for a Mastodon/Misskey account
• 🧩 Simple, developer-friendly API
• 🚀 Easy deployment on Deno Deploy, Fly.io, Railway, or your own server
• Powered by @fedify for robust ActivityPub protocol handling

Getting started is as simple as:

deno add jsr:@fedify/botkit@^0.1.0

Here's a quick example of a weather bot:

const kv = await Deno.openKv();

const bot = createBot<void>({
  username: "weatherbot",
  name: "Seoul Weather Bot",
  summary: text`I post daily weather updates for Seoul!`,
  kv: new DenoKvStore(kv),
  queue: new DenoKvMessageQueue(kv),
});

// Reply to mentions
bot.onMention = async (session, message) => {
  await message.reply(text`Current temperature in Seoul is 18°C!`);
};

// Post scheduled updates
const session = bot.getSession("https://weather.example.com");
setInterval(async () => {
  await session.publish(
    text`Seoul Weather Update 🌡️
    Current: 18°C
    Humidity: 65%
    Forecast: Clear skies ☀️`
  );
}, 1000 * 60 * 60); // Hourly updates

While BotKit currently supports #Deno, we're working on bringing Node.js and Bun support in future releases.

Ready to create your first fediverse bot? Check out our docs at https://botkit.fedify.dev/ to get started! 🚀

#fedidev