diff --git a/Cargo.lock b/Cargo.lock
index 43dd12f..d7f0a89 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -67,6 +67,25 @@ dependencies = [
  "wyz",
 ]
 
+[[package]]
+name = "block-buffer"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4152116fd6e9dadb291ae18fc1ec3575ed6d84c29642d97890f4b4a3417297e4"
+dependencies = [
+ "generic-array 0.14.4",
+]
+
+[[package]]
+name = "buf_redux"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b953a6887648bb07a535631f2bc00fbdb2a2216f135552cb3f534ed136b9c07f"
+dependencies = [
+ "memchr",
+ "safemem",
+]
+
 [[package]]
 name = "bumpalo"
 version = "3.7.0"
@@ -145,6 +164,24 @@ version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ea221b5284a47e40033bf9b66f35f984ec0ea2931eb03505246cd27a963f981b"
 
+[[package]]
+name = "cpufeatures"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "66c99696f6c9dd7f35d486b9d04d7e6e202aa3e8c40d553f2fdf5e7e0c6a71ef"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "digest"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3dd60d1080a57a05ab032377049e0591415d2b31afd7028356dbf3cc6dcb066"
+dependencies = [
+ "generic-array 0.14.4",
+]
+
 [[package]]
 name = "encoding_rs"
 version = "0.8.28"
@@ -307,6 +344,27 @@ dependencies = [
  "typenum",
 ]
 
+[[package]]
+name = "generic-array"
+version = "0.14.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "501466ecc8a30d1d3b7fc9229b122b2ce8ed6e9d9223f1138d4babb253e51817"
+dependencies = [
+ "typenum",
+ "version_check",
+]
+
+[[package]]
+name = "getrandom"
+version = "0.1.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8fc3cb4d91f53b50155bdcfd23f6a4c39ae1969c2ae85982b135750cccaf5fce"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi 0.9.0+wasi-snapshot-preview1",
+]
+
 [[package]]
 name = "getrandom"
 version = "0.2.3"
@@ -315,7 +373,7 @@ checksum = "7fcd999463524c52659517fe2cea98493cfe485d10565e7b0fb07dbba7ad2753"
 dependencies = [
  "cfg-if",
  "libc",
- "wasi",
+ "wasi 0.10.2+wasi-snapshot-preview1",
 ]
 
 [[package]]
@@ -343,6 +401,31 @@ version = "0.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d7afe4a420e3fe79967a00898cc1f4db7c8a49a9333a29f8a4bd76a253d5cd04"
 
+[[package]]
+name = "headers"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f0b7591fb62902706ae8e7aaff416b1b0fa2c0fd0878b46dc13baa3712d8a855"
+dependencies = [
+ "base64",
+ "bitflags",
+ "bytes",
+ "headers-core",
+ "http",
+ "mime",
+ "sha-1",
+ "time",
+]
+
+[[package]]
+name = "headers-core"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e7f66481bfee273957b1f20485a4ff3362987f85b2c236580d81b4eb7a326429"
+dependencies = [
+ "http",
+]
+
 [[package]]
 name = "heck"
 version = "0.3.3"
@@ -462,6 +545,15 @@ dependencies = [
  "hashbrown",
 ]
 
+[[package]]
+name = "input_buffer"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f97967975f448f1a7ddb12b0bc41069d09ed6a1c161a92687e057325db35d413"
+dependencies = [
+ "bytes",
+]
+
 [[package]]
 name = "instant"
 version = "0.1.9"
@@ -516,7 +608,7 @@ dependencies = [
  "log",
  "openssl",
  "parking_lot",
- "rand",
+ "rand 0.8.4",
  "reqwest",
  "serde",
  "sha1",
@@ -524,6 +616,7 @@ dependencies = [
  "tokio",
  "urlencoding",
  "uuid",
+ "warp",
 ]
 
 [[package]]
@@ -562,6 +655,16 @@ version = "0.3.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2a60c7ce501c71e03a9c9c0d35b861413ae925bd979cc7a4e30d060069aaac8d"
 
+[[package]]
+name = "mime_guess"
+version = "2.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2684d4c2e97d99848d30b324b00c8fcc7e5c897b7cbb5819b09e7c90e8baf212"
+dependencies = [
+ "mime",
+ "unicase",
+]
+
 [[package]]
 name = "mio"
 version = "0.7.13"
@@ -584,6 +687,24 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "multipart"
+version = "0.17.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d050aeedc89243f5347c3e237e3e13dc76fbe4ae3742a57b94dc14f69acf76d4"
+dependencies = [
+ "buf_redux",
+ "httparse",
+ "log",
+ "mime",
+ "mime_guess",
+ "quick-error",
+ "rand 0.7.3",
+ "safemem",
+ "tempfile",
+ "twoway",
+]
+
 [[package]]
 name = "native-tls"
 version = "0.2.7"
@@ -691,6 +812,12 @@ version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "692fcb63b64b1758029e0a96ee63e049ce8c5948587f2f7208df04625e5f6b56"
 
+[[package]]
+name = "opaque-debug"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "624a8340c38c1b80fd549087862da4ba43e08858af025b236e509b6649fc13d5"
+
 [[package]]
 name = "openssl"
 version = "0.10.35"
@@ -761,6 +888,26 @@ version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d4fd5641d01c8f18a23da7b6fe29298ff4b55afcccdf78973b24cf3175fee32e"
 
+[[package]]
+name = "pin-project"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c7509cc106041c40a4518d2af7a61530e1eed0e6285296a3d8c5472806ccc4a4"
+dependencies = [
+ "pin-project-internal",
+]
+
+[[package]]
+name = "pin-project-internal"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "48c950132583b500556b1efd71d45b319029f2b71518d979fcc208e16b42426f"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "pin-project-lite"
 version = "0.2.6"
@@ -861,6 +1008,19 @@ version = "0.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "643f8f41a8ebc4c5dc4515c82bb8abd397b527fc20fd681b7c011c2aee5d44fb"
 
+[[package]]
+name = "rand"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a6b1679d49b24bbfe0c803429aa1874472f50d9b363131f0e89fc356b544d03"
+dependencies = [
+ "getrandom 0.1.16",
+ "libc",
+ "rand_chacha 0.2.2",
+ "rand_core 0.5.1",
+ "rand_hc 0.2.0",
+]
+
 [[package]]
 name = "rand"
 version = "0.8.4"
@@ -868,9 +1028,19 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2e7573632e6454cf6b99d7aac4ccca54be06da05aca2ef7423d22d27d4d4bcd8"
 dependencies = [
  "libc",
- "rand_chacha",
- "rand_core",
- "rand_hc",
+ "rand_chacha 0.3.1",
+ "rand_core 0.6.3",
+ "rand_hc 0.3.1",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f4c8ed856279c9737206bf725bf36935d8666ead7aa69b52be55af369d193402"
+dependencies = [
+ "ppv-lite86",
+ "rand_core 0.5.1",
 ]
 
 [[package]]
@@ -880,7 +1050,16 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
 dependencies = [
  "ppv-lite86",
- "rand_core",
+ "rand_core 0.6.3",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "90bde5296fc891b0cef12a6d03ddccc162ce7b2aff54160af9338f8d40df6d19"
+dependencies = [
+ "getrandom 0.1.16",
 ]
 
 [[package]]
@@ -889,7 +1068,16 @@ version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d34f1408f55294453790c48b2f1ebbb1c5b4b7563eb1f418bcfcfdbb06ebb4e7"
 dependencies = [
- "getrandom",
+ "getrandom 0.2.3",
+]
+
+[[package]]
+name = "rand_hc"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca3129af7b92a17112d59ad498c6f81eaf463253766b90396d39ea7a39d6613c"
+dependencies = [
+ "rand_core 0.5.1",
 ]
 
 [[package]]
@@ -898,7 +1086,7 @@ version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d51e9f596de227fda2ea6c84607f5558e196eeaf43c986b724ba4fb8fdf497e7"
 dependencies = [
- "rand_core",
+ "rand_core 0.6.3",
 ]
 
 [[package]]
@@ -991,6 +1179,12 @@ version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "71d301d4193d031abdd79ff7e3dd721168a9572ef3fe51a1517aba235bd8f86e"
 
+[[package]]
+name = "safemem"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ef703b7cb59335eae2eb93ceb664c0eb7ea6bf567079d843e09420219668e072"
+
 [[package]]
 name = "schannel"
 version = "0.1.19"
@@ -1001,6 +1195,12 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "scoped-tls"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ea6a9290e3c9cf0f18145ef7ffa62d68ee0bf5fcd651017e586dc7fd5da448c2"
+
 [[package]]
 name = "scopeguard"
 version = "1.1.0"
@@ -1073,6 +1273,19 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "sha-1"
+version = "0.9.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8c4cfa741c5832d0ef7fab46cabed29c2aae926db0b11bb2069edd8db5e64e16"
+dependencies = [
+ "block-buffer",
+ "cfg-if",
+ "cpufeatures",
+ "digest",
+ "opaque-debug",
+]
+
 [[package]]
 name = "sha1"
 version = "0.6.0"
@@ -1085,7 +1298,7 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6ed5f6ab2122c6dec69dca18c72fa4590a27e581ad20d44960fe74c032a0b23b"
 dependencies = [
- "generic-array",
+ "generic-array 0.12.4",
  "num",
 ]
 
@@ -1142,7 +1355,7 @@ checksum = "dac1c663cfc93810f88aed9b8941d48cabf856a1b111c29a40439018d870eb22"
 dependencies = [
  "cfg-if",
  "libc",
- "rand",
+ "rand 0.8.4",
  "redox_syscall",
  "remove_dir_all",
  "winapi",
@@ -1166,6 +1379,16 @@ dependencies = [
  "unicode-width",
 ]
 
+[[package]]
+name = "time"
+version = "0.1.43"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca8a50ef2360fbd1eeb0ecd46795a87a19024eb4b53c5dc916ca1fd95fe62438"
+dependencies = [
+ "libc",
+ "winapi",
+]
+
 [[package]]
 name = "tinyvec"
 version = "1.2.0"
@@ -1219,6 +1442,30 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "tokio-stream"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8864d706fdb3cc0843a49647ac892720dac98a6eeb818b77190592cf4994066"
+dependencies = [
+ "futures-core",
+ "pin-project-lite",
+ "tokio",
+]
+
+[[package]]
+name = "tokio-tungstenite"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e1a5f475f1b9d077ea1017ecbc60890fda8e54942d680ca0b1d2b47cfa2d861b"
+dependencies = [
+ "futures-util",
+ "log",
+ "pin-project",
+ "tokio",
+ "tungstenite",
+]
+
 [[package]]
 name = "tokio-util"
 version = "0.6.7"
@@ -1246,6 +1493,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "09adeb8c97449311ccd28a427f96fb563e7fd31aabf994189879d9da2394b89d"
 dependencies = [
  "cfg-if",
+ "log",
  "pin-project-lite",
  "tracing-core",
 ]
@@ -1265,12 +1513,49 @@ version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "59547bce71d9c38b83d9c0e92b6066c4253371f15005def0c30d9657f50c7642"
 
+[[package]]
+name = "tungstenite"
+version = "0.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ada8297e8d70872fa9a551d93250a9f407beb9f37ef86494eb20012a2ff7c24"
+dependencies = [
+ "base64",
+ "byteorder",
+ "bytes",
+ "http",
+ "httparse",
+ "input_buffer",
+ "log",
+ "rand 0.8.4",
+ "sha-1",
+ "url",
+ "utf-8",
+]
+
+[[package]]
+name = "twoway"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "59b11b2b5241ba34be09c3cc85a36e56e48f9888862e19cedf23336d35316ed1"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "typenum"
 version = "1.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "879f6906492a7cd215bfa4cf595b600146ccfac0c79bcbd1f3000162af5e8b06"
 
+[[package]]
+name = "unicase"
+version = "2.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50f37be617794602aabbeee0be4f259dc1778fabe05e2d67ee8f79326d5cb4f6"
+dependencies = [
+ "version_check",
+]
+
 [[package]]
 name = "unicode-bidi"
 version = "0.3.5"
@@ -1325,13 +1610,19 @@ version = "1.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5a1f0175e03a0973cf4afd476bef05c26e228520400eb1fd473ad417b1c00ffb"
 
+[[package]]
+name = "utf-8"
+version = "0.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09cc8ee72d2a9becf2f2febe0205bbed8fc6615b7cb429ad062dc7b7ddd036a9"
+
 [[package]]
 name = "uuid"
 version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bc5cf98d8186244414c848017f0e2676b3fcb46807f6668a97dfe67359a3c4b7"
 dependencies = [
- "getrandom",
+ "getrandom 0.2.3",
 ]
 
 [[package]]
@@ -1362,6 +1653,41 @@ dependencies = [
  "try-lock",
 ]
 
+[[package]]
+name = "warp"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "332d47745e9a0c38636dbd454729b147d16bd1ed08ae67b3ab281c4506771054"
+dependencies = [
+ "bytes",
+ "futures",
+ "headers",
+ "http",
+ "hyper",
+ "log",
+ "mime",
+ "mime_guess",
+ "multipart",
+ "percent-encoding",
+ "pin-project",
+ "scoped-tls",
+ "serde",
+ "serde_json",
+ "serde_urlencoded",
+ "tokio",
+ "tokio-stream",
+ "tokio-tungstenite",
+ "tokio-util",
+ "tower-service",
+ "tracing",
+]
+
+[[package]]
+name = "wasi"
+version = "0.9.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
+
 [[package]]
 name = "wasi"
 version = "0.10.2+wasi-snapshot-preview1"
diff --git a/crates/librqbit/Cargo.toml b/crates/librqbit/Cargo.toml
index a4ded7b..7beaf75 100644
--- a/crates/librqbit/Cargo.toml
+++ b/crates/librqbit/Cargo.toml
@@ -20,7 +20,8 @@ parking_lot = "0.11"
 log = "0.4"
 size_format = "1"
 rand = "0.8"
-openssl = "*"
+openssl = "0.10"
+warp = "0.3"
 
 uuid = {version = "0.8", features = ["v4"]}
 futures = "0.3"
diff --git a/crates/librqbit/src/http_api.rs b/crates/librqbit/src/http_api.rs
new file mode 100644
index 0000000..59f9cb7
--- /dev/null
+++ b/crates/librqbit/src/http_api.rs
@@ -0,0 +1,13 @@
+use std::sync::Arc;
+
+use warp::Filter;
+
+use crate::torrent_state::TorrentState;
+
+// This is just a stub for debugging, nothing useful here.
+pub async fn make_and_run_http_api(state: Arc<TorrentState>) -> anyhow::Result<()> {
+    let dump_haves = warp::path("haves")
+        .map(move || format!("{:?}", state.locked.read().chunks.get_have_pieces()));
+    warp::serve(dump_haves).run(([127, 0, 0, 1], 3030)).await;
+    Ok(())
+}
diff --git a/crates/librqbit/src/lib.rs b/crates/librqbit/src/lib.rs
index 7991f7b..1074fcc 100644
--- a/crates/librqbit/src/lib.rs
+++ b/crates/librqbit/src/lib.rs
@@ -3,6 +3,7 @@ pub mod chunk_tracker;
 pub mod clone_to_owned;
 pub mod constants;
 pub mod file_ops;
+pub mod http_api;
 pub mod lengths;
 pub mod peer_binary_protocol;
 pub mod peer_connection;
diff --git a/crates/librqbit/src/torrent_manager.rs b/crates/librqbit/src/torrent_manager.rs
index b49481d..38a4258 100644
--- a/crates/librqbit/src/torrent_manager.rs
+++ b/crates/librqbit/src/torrent_manager.rs
@@ -19,6 +19,7 @@ use size_format::SizeFormatterBinary as SF;
 use crate::{
     chunk_tracker::ChunkTracker,
     file_ops::FileOps,
+    http_api::make_and_run_http_api,
     lengths::Lengths,
     spawn_utils::spawn,
     torrent_metainfo::TorrentMetaV1Owned,
@@ -189,6 +190,7 @@ impl TorrentManager {
 
         spawn("tracker monitor", mgr.clone().task_tracker_monitor());
         spawn("stats printer", mgr.clone().stats_printer());
+        spawn("http api", make_and_run_http_api(mgr.state.clone()));
         Ok(mgr.into_handle())
     }
 
@@ -265,7 +267,7 @@ impl TorrentManager {
         let response = crate::serde_bencode::from_bytes::<CompactTrackerResponse>(&bytes)?;
 
         for peer in response.peers.iter_sockaddrs() {
-            self.state.add_peer(peer);
+            self.state.add_peer_if_not_seen(peer);
         }
         Ok(response.interval)
     }
diff --git a/crates/librqbit/src/torrent_state.rs b/crates/librqbit/src/torrent_state.rs
index 0e51caa..d37a61a 100644
--- a/crates/librqbit/src/torrent_state.rs
+++ b/crates/librqbit/src/torrent_state.rs
@@ -378,11 +378,11 @@ impl TorrentState {
         );
     }
 
-    pub fn add_peer(self: &Arc<Self>, addr: SocketAddr) {
+    pub fn add_peer_if_not_seen(self: &Arc<Self>, addr: SocketAddr) -> bool {
         let (out_tx, out_rx) = channel::<WriterRequest>(1);
         let handle = match self.locked.write().peers.add_if_not_seen(addr, out_tx) {
             Some(handle) => handle,
-            None => return,
+            None => return false,
         };
 
         let peer_connection = PeerConnection::new(self.clone());
@@ -393,5 +393,6 @@ impl TorrentState {
             peer_connection.into_state().drop_peer(handle);
             Ok::<_, anyhow::Error>(())
         });
+        true
     }
 }