From 0dbf8afa0d47201269b1174fff54aec1047b4555 Mon Sep 17 00:00:00 2001
From: Gabriel Kaszewski <gabrielkaszewski@gmail.com>
Date: Fri, 8 May 2026 14:39:25 +0200
Subject: [PATCH] init activitypub crate

---
 Cargo.lock                             | 506 +++++++++++++++++++++++--
 Cargo.toml                             |   5 +-
 crates/adapters/activitypub/Cargo.toml |  20 +
 crates/adapters/activitypub/src/lib.rs |   1 +
 4 files changed, 508 insertions(+), 24 deletions(-)
 create mode 100644 crates/adapters/activitypub/Cargo.toml
 create mode 100644 crates/adapters/activitypub/src/lib.rs

diff --git a/Cargo.lock b/Cargo.lock
index e324cae..c225f07 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,6 +2,226 @@
 # It is not intended for manual editing.
 version = 4
 
+[[package]]
+name = "activitypub"
+version = "0.1.0"
+dependencies = [
+ "activitypub_federation",
+ "anyhow",
+ "application",
+ "async-trait",
+ "chrono",
+ "domain",
+ "reqwest 0.13.3",
+ "serde",
+ "serde_json",
+ "thiserror 2.0.18",
+ "tokio",
+ "tracing",
+ "uuid",
+]
+
+[[package]]
+name = "activitypub_federation"
+version = "0.6.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b58dd6127cbb797b5626306bebef8ca464fdb38c50f2ed6ecc7a3fcf45d422ec"
+dependencies = [
+ "activitystreams-kinds",
+ "actix-web",
+ "async-trait",
+ "axum 0.7.9",
+ "base64",
+ "bytes",
+ "chrono",
+ "derive_builder",
+ "dyn-clone",
+ "either",
+ "enum_delegate",
+ "futures",
+ "futures-core",
+ "http 0.2.12",
+ "http 1.4.0",
+ "http-signature-normalization",
+ "http-signature-normalization-reqwest",
+ "httpdate",
+ "itertools 0.13.0",
+ "moka",
+ "once_cell",
+ "pin-project-lite",
+ "rand 0.8.6",
+ "regex",
+ "reqwest 0.12.28",
+ "reqwest-middleware",
+ "rsa",
+ "serde",
+ "serde_json",
+ "sha2",
+ "thiserror 1.0.69",
+ "tokio",
+ "tower 0.4.13",
+ "tracing",
+ "url",
+]
+
+[[package]]
+name = "activitystreams-kinds"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e97dfe76efd8c0b113cc3580a6b5f4acba47662e3cfbbfcce081c9ac89798990"
+dependencies = [
+ "serde",
+ "url",
+]
+
+[[package]]
+name = "actix-codec"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5f7b0a21988c1bf877cf4759ef5ddaac04c1c9fe808c9142ecb78ba97d97a28a"
+dependencies = [
+ "bitflags 2.11.1",
+ "bytes",
+ "futures-core",
+ "futures-sink",
+ "memchr",
+ "pin-project-lite",
+ "tokio",
+ "tokio-util",
+ "tracing",
+]
+
+[[package]]
+name = "actix-http"
+version = "3.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "93acb4a42f64936f9b8cae4a433b237599dd6eb6ed06124eb67132ef8cc90662"
+dependencies = [
+ "actix-codec",
+ "actix-rt",
+ "actix-service",
+ "actix-utils",
+ "bitflags 2.11.1",
+ "bytes",
+ "bytestring",
+ "derive_more",
+ "encoding_rs",
+ "foldhash 0.1.5",
+ "futures-core",
+ "http 0.2.12",
+ "httparse",
+ "httpdate",
+ "itoa",
+ "language-tags",
+ "mime",
+ "percent-encoding",
+ "pin-project-lite",
+ "smallvec",
+ "tokio",
+ "tokio-util",
+ "tracing",
+]
+
+[[package]]
+name = "actix-router"
+version = "0.5.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "14f8c75c51892f18d9c46150c5ac7beb81c95f78c8b83a634d49f4ca32551fe7"
+dependencies = [
+ "bytestring",
+ "cfg-if",
+ "http 0.2.12",
+ "regex-lite",
+ "serde",
+ "tracing",
+]
+
+[[package]]
+name = "actix-rt"
+version = "2.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "92589714878ca59a7626ea19734f0e07a6a875197eec751bb5d3f99e64998c63"
+dependencies = [
+ "futures-core",
+ "tokio",
+]
+
+[[package]]
+name = "actix-server"
+version = "2.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a65064ea4a457eaf07f2fba30b4c695bf43b721790e9530d26cb6f9019ff7502"
+dependencies = [
+ "actix-rt",
+ "actix-service",
+ "actix-utils",
+ "futures-core",
+ "futures-util",
+ "mio",
+ "socket2 0.5.10",
+ "tokio",
+ "tracing",
+]
+
+[[package]]
+name = "actix-service"
+version = "2.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9e46f36bf0e5af44bdc4bdb36fbbd421aa98c79a9bce724e1edeb3894e10dc7f"
+dependencies = [
+ "futures-core",
+ "pin-project-lite",
+]
+
+[[package]]
+name = "actix-utils"
+version = "3.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "88a1dcdff1466e3c2488e1cb5c36a71822750ad43839937f85d2f4d9f8b705d8"
+dependencies = [
+ "local-waker",
+ "pin-project-lite",
+]
+
+[[package]]
+name = "actix-web"
+version = "4.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ff87453bc3b56e9b2b23c1cc0b1be8797184accf51d2abe0f8a33ec275d316bf"
+dependencies = [
+ "actix-codec",
+ "actix-http",
+ "actix-router",
+ "actix-rt",
+ "actix-server",
+ "actix-service",
+ "actix-utils",
+ "bytes",
+ "bytestring",
+ "cfg-if",
+ "derive_more",
+ "encoding_rs",
+ "foldhash 0.1.5",
+ "futures-core",
+ "futures-util",
+ "impl-more",
+ "itoa",
+ "language-tags",
+ "log",
+ "mime",
+ "once_cell",
+ "pin-project-lite",
+ "regex-lite",
+ "serde",
+ "serde_json",
+ "serde_urlencoded",
+ "smallvec",
+ "socket2 0.6.3",
+ "time",
+ "tracing",
+ "url",
+]
+
 [[package]]
 name = "aes"
 version = "0.8.4"
@@ -342,24 +562,53 @@ dependencies = [
  "fs_extra",
 ]
 
+[[package]]
+name = "axum"
+version = "0.7.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "edca88bc138befd0323b20752846e6587272d3b03b0343c8ea28a6f819e6e71f"
+dependencies = [
+ "async-trait",
+ "axum-core 0.4.5",
+ "bytes",
+ "futures-util",
+ "http 1.4.0",
+ "http-body",
+ "http-body-util",
+ "itoa",
+ "matchit 0.7.3",
+ "memchr",
+ "mime",
+ "percent-encoding",
+ "pin-project-lite",
+ "rustversion",
+ "serde",
+ "serde_json",
+ "serde_path_to_error",
+ "sync_wrapper",
+ "tower 0.5.3",
+ "tower-layer",
+ "tower-service",
+]
+
 [[package]]
 name = "axum"
 version = "0.8.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "31b698c5f9a010f6573133b09e0de5408834d0c82f8d7475a89fc1867a71cd90"
 dependencies = [
- "axum-core",
+ "axum-core 0.5.6",
  "axum-macros",
  "bytes",
  "form_urlencoded",
  "futures-util",
- "http",
+ "http 1.4.0",
  "http-body",
  "http-body-util",
  "hyper",
  "hyper-util",
  "itoa",
- "matchit",
+ "matchit 0.8.4",
  "memchr",
  "mime",
  "percent-encoding",
@@ -370,12 +619,32 @@ dependencies = [
  "serde_urlencoded",
  "sync_wrapper",
  "tokio",
- "tower",
+ "tower 0.5.3",
  "tower-layer",
  "tower-service",
  "tracing",
 ]
 
+[[package]]
+name = "axum-core"
+version = "0.4.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09f2bd6146b97ae3359fa0cc6d6b376d9539582c7b4220f041a33ec24c226199"
+dependencies = [
+ "async-trait",
+ "bytes",
+ "futures-util",
+ "http 1.4.0",
+ "http-body",
+ "http-body-util",
+ "mime",
+ "pin-project-lite",
+ "rustversion",
+ "sync_wrapper",
+ "tower-layer",
+ "tower-service",
+]
+
 [[package]]
 name = "axum-core"
 version = "0.5.6"
@@ -384,7 +653,7 @@ checksum = "08c78f31d7b1291f7ee735c1c6780ccde7785daae9a9206026862dab7d8792d1"
 dependencies = [
  "bytes",
  "futures-core",
- "http",
+ "http 1.4.0",
  "http-body",
  "http-body-util",
  "mime",
@@ -521,6 +790,15 @@ version = "1.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1e748733b7cbc798e1434b6ac524f0c1ff2ab456fe201501e6497c8417a4fc33"
 
+[[package]]
+name = "bytestring"
+version = "1.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "86566c496f2f47d9b8147a4c8b02ffdb69c919fe0c2b2e7195d22cbba0e635c9"
+dependencies = [
+ "bytes",
+]
+
 [[package]]
 name = "castaway"
 version = "0.2.4"
@@ -705,6 +983,24 @@ version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "217698eaf96b4a3f0bc4f3662aaa55bdf913cd54d7204591faa790070c6d0853"
 
+[[package]]
+name = "crossbeam-channel"
+version = "0.5.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "82b8f8f868b36967f9606790d1903570de9ceaf870a7bf9fbbd3016d636a2cb2"
+dependencies = [
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-epoch"
+version = "0.9.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5b82ac4a3c2ca9c3460964f020e1402edd5753411d7737aa39c3714ad1b5420e"
+dependencies = [
+ "crossbeam-utils",
+]
+
 [[package]]
 name = "crossbeam-queue"
 version = "0.3.12"
@@ -934,6 +1230,7 @@ dependencies = [
  "quote",
  "rustc_version",
  "syn 2.0.117",
+ "unicode-xid",
 ]
 
 [[package]]
@@ -1022,6 +1319,12 @@ version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "92773504d58c093f6de2459af4af33faa518c13451eb8f2b5698ed3d36e7c813"
 
+[[package]]
+name = "dyn-clone"
+version = "1.0.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d0881ea181b1df73ff77ffaaf9c7544ecc11e82fba9b5f27b262a3c73a332555"
+
 [[package]]
 name = "either"
 version = "1.15.0"
@@ -1055,6 +1358,30 @@ version = "1.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "66b7e2430c6dff6a955451e2cfc438f09cea1965a9d6f87f7e3b90decc014099"
 
+[[package]]
+name = "enum_delegate"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a8ea75f31022cba043afe037940d73684327e915f88f62478e778c3de914cd0a"
+dependencies = [
+ "enum_delegate_lib",
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+]
+
+[[package]]
+name = "enum_delegate_lib"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2e1f6c3800b304a6be0012039e2a45a322a093539c45ab818d9e6895a39c90fe"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "rand 0.8.6",
+ "syn 1.0.109",
+]
+
 [[package]]
 name = "enumflags2"
 version = "0.7.12"
@@ -1411,7 +1738,7 @@ dependencies = [
  "fnv",
  "futures-core",
  "futures-sink",
- "http",
+ "http 1.4.0",
  "indexmap",
  "slab",
  "tokio",
@@ -1501,6 +1828,17 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "http"
+version = "0.2.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "601cbb57e577e2f5ef5be8e7b83f0f63994f25aa94d673e54a92d5c516d101f1"
+dependencies = [
+ "bytes",
+ "fnv",
+ "itoa",
+]
+
 [[package]]
 name = "http"
 version = "1.4.0"
@@ -1518,7 +1856,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1efedce1fb8e6913f23e0c92de8e62cd5b772a67e7b3946df930a62566c93184"
 dependencies = [
  "bytes",
- "http",
+ "http 1.4.0",
 ]
 
 [[package]]
@@ -1529,7 +1867,7 @@ checksum = "b021d93e26becf5dc7e1b75b1bed1fd93124b374ceb73f43d4d4eafec896a64a"
 dependencies = [
  "bytes",
  "futures-core",
- "http",
+ "http 1.4.0",
  "http-body",
  "pin-project-lite",
 ]
@@ -1540,6 +1878,32 @@ version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9171a2ea8a68358193d15dd5d70c1c10a2afc3e7e4c5bc92bc9f025cebd7359c"
 
+[[package]]
+name = "http-signature-normalization"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b95e3149194de5f3f9d5225bcc6a8677979f8ff8ce39c85654730ad4824f101e"
+dependencies = [
+ "httpdate",
+]
+
+[[package]]
+name = "http-signature-normalization-reqwest"
+version = "0.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8822f7eab343cae1ce3bd3b6d0b9b58c72adaf3463627cfe150f8f5406f27aa"
+dependencies = [
+ "async-trait",
+ "base64",
+ "http-signature-normalization",
+ "httpdate",
+ "reqwest 0.12.28",
+ "reqwest-middleware",
+ "sha2",
+ "thiserror 1.0.69",
+ "tokio",
+]
+
 [[package]]
 name = "httparse"
 version = "1.10.1"
@@ -1569,7 +1933,7 @@ dependencies = [
  "futures-channel",
  "futures-core",
  "h2",
- "http",
+ "http 1.4.0",
  "http-body",
  "httparse",
  "httpdate",
@@ -1586,7 +1950,7 @@ version = "0.27.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "33ca68d021ef39cf6463ab54c1d0f5daf03377b70561305bb89a8f83aab66e0f"
 dependencies = [
- "http",
+ "http 1.4.0",
  "hyper",
  "hyper-util",
  "rustls",
@@ -1594,6 +1958,7 @@ dependencies = [
  "tokio",
  "tokio-rustls",
  "tower-service",
+ "webpki-roots 1.0.7",
 ]
 
 [[package]]
@@ -1606,14 +1971,14 @@ dependencies = [
  "bytes",
  "futures-channel",
  "futures-util",
- "http",
+ "http 1.4.0",
  "http-body",
  "hyper",
  "ipnet",
  "libc",
  "percent-encoding",
  "pin-project-lite",
- "socket2",
+ "socket2 0.6.3",
  "system-configuration",
  "tokio",
  "tower-service",
@@ -1760,6 +2125,12 @@ dependencies = [
  "icu_properties",
 ]
 
+[[package]]
+name = "impl-more"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e8a5a9a0ff0086c7a148acb942baaabeadf9504d10400b5a05645853729b9cd2"
+
 [[package]]
 name = "indexmap"
 version = "2.14.0"
@@ -1965,6 +2336,12 @@ version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bf36173d4167ed999940f804952e6b08197cae5ad5d572eb4db150ce8ad5d58f"
 
+[[package]]
+name = "language-tags"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d4345964bb142484797b161f473a503a434de77149dd8c7427788c6e13379388"
+
 [[package]]
 name = "lazy_static"
 version = "1.5.0"
@@ -2042,6 +2419,12 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "11d3d7f243d5c5a8b9bb5d6dd2b1602c0cb0b9db1621bafc7ed66e35ff9fe092"
 
+[[package]]
+name = "local-waker"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4d873d7c67ce09b42110d801813efbc9364414e356be9935700d368351657487"
+
 [[package]]
 name = "lock_api"
 version = "0.4.14"
@@ -2091,6 +2474,12 @@ dependencies = [
  "regex-automata",
 ]
 
+[[package]]
+name = "matchit"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0e7465ac9959cc2b1404e8e2367b43684a6d13790fe23056cc8c6c5a6b7bcb94"
+
 [[package]]
 name = "matchit"
 version = "0.8.4"
@@ -2172,6 +2561,26 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "moka"
+version = "0.12.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "957228ad12042ee839f93c8f257b62b4c0ab5eaae1d4fa60de53b27c9d7c5046"
+dependencies = [
+ "async-lock",
+ "crossbeam-channel",
+ "crossbeam-epoch",
+ "crossbeam-utils",
+ "equivalent",
+ "event-listener",
+ "futures-util",
+ "parking_lot",
+ "portable-atomic",
+ "smallvec",
+ "tagptr",
+ "uuid",
+]
+
 [[package]]
 name = "never"
 version = "0.1.0"
@@ -2679,7 +3088,7 @@ dependencies = [
  "application",
  "async-trait",
  "auth",
- "axum",
+ "axum 0.8.9",
  "chrono",
  "domain",
  "dotenvy",
@@ -2697,7 +3106,7 @@ dependencies = [
  "template-askama",
  "thiserror 2.0.18",
  "tokio",
- "tower",
+ "tower 0.5.3",
  "tower-http",
  "tracing",
  "tracing-subscriber",
@@ -2756,7 +3165,7 @@ dependencies = [
  "quinn-udp",
  "rustc-hash",
  "rustls",
- "socket2",
+ "socket2 0.6.3",
  "thiserror 2.0.18",
  "tokio",
  "tracing",
@@ -2794,7 +3203,7 @@ dependencies = [
  "cfg_aliases",
  "libc",
  "once_cell",
- "socket2",
+ "socket2 0.6.3",
  "tracing",
  "windows-sys 0.59.0",
 ]
@@ -3016,6 +3425,12 @@ dependencies = [
  "regex-syntax",
 ]
 
+[[package]]
+name = "regex-lite"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cab834c73d247e67f4fae452806d17d3c7501756d98c8808d7c9c7aa7d18f973"
+
 [[package]]
 name = "regex-syntax"
 version = "0.8.10"
@@ -3033,7 +3448,7 @@ dependencies = [
  "futures-core",
  "futures-util",
  "h2",
- "http",
+ "http 1.4.0",
  "http-body",
  "http-body-util",
  "hyper",
@@ -3054,7 +3469,7 @@ dependencies = [
  "tokio",
  "tokio-rustls",
  "tokio-util",
- "tower",
+ "tower 0.5.3",
  "tower-http",
  "tower-service",
  "url",
@@ -3062,6 +3477,7 @@ dependencies = [
  "wasm-bindgen-futures",
  "wasm-streams",
  "web-sys",
+ "webpki-roots 1.0.7",
 ]
 
 [[package]]
@@ -3075,7 +3491,7 @@ dependencies = [
  "encoding_rs",
  "futures-core",
  "h2",
- "http",
+ "http 1.4.0",
  "http-body",
  "http-body-util",
  "hyper",
@@ -3096,7 +3512,7 @@ dependencies = [
  "sync_wrapper",
  "tokio",
  "tokio-rustls",
- "tower",
+ "tower 0.5.3",
  "tower-http",
  "tower-service",
  "url",
@@ -3105,6 +3521,21 @@ dependencies = [
  "web-sys",
 ]
 
+[[package]]
+name = "reqwest-middleware"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "562ceb5a604d3f7c885a792d42c199fd8af239d0a51b2fa6a78aafa092452b04"
+dependencies = [
+ "anyhow",
+ "async-trait",
+ "http 1.4.0",
+ "reqwest 0.12.28",
+ "serde",
+ "thiserror 1.0.69",
+ "tower-service",
+]
+
 [[package]]
 name = "ring"
 version = "0.17.14"
@@ -3385,6 +3816,7 @@ version = "1.0.149"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "83fc039473c5595ace860d8c4fafa220ff474b3fc6bfdb4293327f1a37e94d86"
 dependencies = [
+ "indexmap",
  "itoa",
  "memchr",
  "serde",
@@ -3574,6 +4006,16 @@ dependencies = [
  "syn 2.0.117",
 ]
 
+[[package]]
+name = "socket2"
+version = "0.5.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e22376abed350d73dd1cd119b57ffccad95b4e585a7cda43e286245ce23c0678"
+dependencies = [
+ "libc",
+ "windows-sys 0.52.0",
+]
+
 [[package]]
 name = "socket2"
 version = "0.6.3"
@@ -3929,6 +4371,12 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "tagptr"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b2093cf4c8eb1e67749a6762251bc9cd836b6fc171623bd0a9d324d37af2417"
+
 [[package]]
 name = "tempfile"
 version = "3.27.0"
@@ -4136,7 +4584,7 @@ dependencies = [
  "parking_lot",
  "pin-project-lite",
  "signal-hook-registry",
- "socket2",
+ "socket2 0.6.3",
  "tokio-macros",
  "tracing",
  "windows-sys 0.61.2",
@@ -4217,6 +4665,17 @@ dependencies = [
  "winnow",
 ]
 
+[[package]]
+name = "tower"
+version = "0.4.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8fa9be0de6cf49e536ce1851f987bd21a43b771b09473c3549a6c853db37c1c"
+dependencies = [
+ "tower-layer",
+ "tower-service",
+ "tracing",
+]
+
 [[package]]
 name = "tower"
 version = "0.5.3"
@@ -4243,7 +4702,7 @@ dependencies = [
  "bytes",
  "futures-core",
  "futures-util",
- "http",
+ "http 1.4.0",
  "http-body",
  "http-body-util",
  "http-range-header",
@@ -4255,7 +4714,7 @@ dependencies = [
  "pin-project-lite",
  "tokio",
  "tokio-util",
- "tower",
+ "tower 0.5.3",
  "tower-layer",
  "tower-service",
  "tracing",
@@ -4463,6 +4922,7 @@ dependencies = [
  "idna",
  "percent-encoding",
  "serde",
+ "serde_derive",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index 37a8dc8..f72187b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,9 +8,11 @@ members = [
     "crates/adapters/rss",
     "crates/adapters/sqlite",
     "crates/adapters/template-askama",
+    "crates/adapters/activitypub",
     "crates/application",
     "crates/domain",
-    "crates/presentation", "crates/tui",
+    "crates/presentation",
+    "crates/tui",
 ]
 resolver = "2"
 
@@ -46,3 +48,4 @@ event-publisher = { path = "crates/adapters/event-publisher" }
 rss = { path = "crates/adapters/rss" }
 sqlite = { path = "crates/adapters/sqlite" }
 template-askama = { path = "crates/adapters/template-askama" }
+activitypub = { path = "crates/adapters/activitypub" }
diff --git a/crates/adapters/activitypub/Cargo.toml b/crates/adapters/activitypub/Cargo.toml
new file mode 100644
index 0000000..17586a0
--- /dev/null
+++ b/crates/adapters/activitypub/Cargo.toml
@@ -0,0 +1,20 @@
+[package]
+name = "activitypub"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+domain = { workspace = true }
+application = { workspace = true }
+tokio = { workspace = true }
+serde = { workspace = true }
+serde_json = { workspace = true }
+reqwest = { workspace = true }
+uuid = { workspace = true }
+chrono = { workspace = true }
+thiserror = { workspace = true }
+anyhow = { workspace = true }
+tracing = { workspace = true }
+async-trait = { workspace = true }
+
+activitypub_federation = "0.6.5"
diff --git a/crates/adapters/activitypub/src/lib.rs b/crates/adapters/activitypub/src/lib.rs
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/crates/adapters/activitypub/src/lib.rs
@@ -0,0 +1 @@
+