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Hatsu

Self-hosted bridge that makes a static site's pages and posts reachable from the fediverse through ActivityPub.

Hatsu is a bridge that makes a static site reachable from the fediverse. It runs on the creator’s own server, takes the site’s content from the site’s feed, and presents the site’s pages as ActivityPub posts from a Hatsu account. Fediverse users can follow the site or search for a page URL and land on the matching post, and replies from the fediverse come back to the static site as backfeed.

To connect a site, the site publishes its feed, serves the well-known files that Hatsu returns as static files, and adds an alternate link tag to each page. The documentation covers the setup. Hatsu is written in Rust and runs as a Docker image or as a binary from GitHub Releases. Its settings come from environment variables, and it stores data in SQLite or PostgreSQL.

Worth knowing

The documentation calls Hatsu a work in progress, and the README marks backfeed as WIP. Because Hatsu runs as a server process, the static site needs a separate machine or container running Hatsu next to its hosting.

Identity

Status
Active
Maintainer
藍+85CD4
First release
20243

Rendering and deploy

Runs as
Always on6
Install with
docker image ghcr.io/importantimport/hatsu78

Releases

Current major version
Pre-1.03
Last release
2026-10-013

Adoption

GitHub stars
2582
Contributors
79

Why these figures do not compare

Sources

  1. 2026-11-03: links
    hatsu.cli.rs/
  2. 2026-11-03: links, Written in, License, GitHub stars
    api.github.com/repos/importantimport/hatsu
  3. 2026-11-03: First release, Current major version, Last release
    api.github.com/repos/importantimport/hatsu/releases
  4. 2026-11-03: Maintainer
    raw.githubusercontent.com/importantimport/hatsu/v0.3.5/Cargo.toml
  5. 2026-11-03: Categories, Runtime, License model
    github.com/importantimport/hatsu/blob/main/README.md
  6. 2026-11-03: Runs as, Databases
    hatsu.cli.rs/admins/environments.html
  7. 2026-11-03: Install with
    hatsu.cli.rs/admins/install-docker.html
  8. 2026-11-03: Install with
    hatsu.cli.rs/admins/install-binary.html
  9. 2026-11-03: Contributors
    api.github.com/repos/importantimport/hatsu/contributors

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