diff --git a/Cargo.lock b/Cargo.lock
index 1c11b05..561d992 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -667,6 +667,41 @@ dependencies = [
  "typenum",
 ]
 
+[[package]]
+name = "darling"
+version = "0.20.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "83b2eb4d90d12bdda5ed17de686c2acb4c57914f8f921b8da7e112b5a36f3fe1"
+dependencies = [
+ "darling_core",
+ "darling_macro",
+]
+
+[[package]]
+name = "darling_core"
+version = "0.20.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "622687fe0bac72a04e5599029151f5796111b90f1baaa9b544d807a5e31cd120"
+dependencies = [
+ "fnv",
+ "ident_case",
+ "proc-macro2",
+ "quote",
+ "strsim",
+ "syn 2.0.60",
+]
+
+[[package]]
+name = "darling_macro"
+version = "0.20.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "733cabb43482b1a1b53eee8583c2b9e8684d592215ea83efd305dd31bc2f0178"
+dependencies = [
+ "darling_core",
+ "quote",
+ "syn 2.0.60",
+]
+
 [[package]]
 name = "der"
 version = "0.7.9"
@@ -685,6 +720,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b42b6fa04a440b495c8b04d0e71b707c585f83cb9cb28cf8cd0d976c315e31b4"
 dependencies = [
  "powerfmt",
+ "serde",
 ]
 
 [[package]]
@@ -906,6 +942,16 @@ version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8fcfdc7a0362c9f4444381a9e697c79d435fe65b52a37466fc2c1184cee9edc6"
 
+[[package]]
+name = "flate2"
+version = "1.0.30"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5f54427cfd1c7829e2a139fcefea601bf088ebca651d2bf53ebc600eac295dae"
+dependencies = [
+ "crc32fast",
+ "miniz_oxide",
+]
+
 [[package]]
 name = "flume"
 version = "0.11.0"
@@ -1197,7 +1243,7 @@ dependencies = [
  "futures-sink",
  "futures-util",
  "http 0.2.12",
- "indexmap",
+ "indexmap 2.2.6",
  "slab",
  "tokio",
  "tokio-util",
@@ -1218,6 +1264,12 @@ dependencies = [
  "rand_distr",
 ]
 
+[[package]]
+name = "hashbrown"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
+
 [[package]]
 name = "hashbrown"
 version = "0.13.2"
@@ -1480,6 +1532,12 @@ dependencies = [
  "cc",
 ]
 
+[[package]]
+name = "ident_case"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b9e0384b61958566e926dc50660321d12159025e767c18e043daf26b70104c39"
+
 [[package]]
 name = "idna"
 version = "0.5.0"
@@ -1490,6 +1548,17 @@ dependencies = [
  "unicode-normalization",
 ]
 
+[[package]]
+name = "indexmap"
+version = "1.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bd070e393353796e801d209ad339e89596eb4c8d430d18ede6a1cced8fafbd99"
+dependencies = [
+ "autocfg",
+ "hashbrown 0.12.3",
+ "serde",
+]
+
 [[package]]
 name = "indexmap"
 version = "2.2.6"
@@ -1609,7 +1678,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0c2a198fb6b0eada2a8df47933734e6d35d350665a33a3593d7164fa52c75c19"
 dependencies = [
  "cfg-if",
- "windows-targets 0.48.5",
+ "windows-targets 0.52.5",
 ]
 
 [[package]]
@@ -2433,7 +2502,7 @@ dependencies = [
  "either",
  "figment",
  "futures",
- "indexmap",
+ "indexmap 2.2.6",
  "log",
  "memchr",
  "multer",
@@ -2465,7 +2534,7 @@ checksum = "a2238066abf75f21be6cd7dc1a09d5414a671f4246e384e49fe3f8a4936bd04c"
 dependencies = [
  "devise",
  "glob",
- "indexmap",
+ "indexmap 2.2.6",
  "proc-macro2",
  "quote",
  "rocket_http",
@@ -2485,7 +2554,7 @@ dependencies = [
  "futures",
  "http 0.2.12",
  "hyper 0.14.28",
- "indexmap",
+ "indexmap 2.2.6",
  "log",
  "memchr",
  "pear",
@@ -2726,7 +2795,7 @@ version = "1.0.116"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3e17db7126d17feb94eb3fad46bf1a96b034e8aacbc2e775fe81505f8b0b2813"
 dependencies = [
- "indexmap",
+ "indexmap 2.2.6",
  "itoa",
  "ryu",
  "serde",
@@ -2762,6 +2831,36 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "serde_with"
+version = "3.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ad483d2ab0149d5a5ebcd9972a3852711e0153d863bf5a5d0391d28883c4a20"
+dependencies = [
+ "base64 0.22.0",
+ "chrono",
+ "hex",
+ "indexmap 1.9.3",
+ "indexmap 2.2.6",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "serde_with_macros",
+ "time",
+]
+
+[[package]]
+name = "serde_with_macros"
+version = "3.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "65569b702f41443e8bc8bbb1c5779bd0450bbe723b56198980e80ec45780bce2"
+dependencies = [
+ "darling",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.60",
+]
+
 [[package]]
 name = "sha1"
 version = "0.10.6"
@@ -2914,7 +3013,7 @@ dependencies = [
  "futures-util",
  "hashlink",
  "hex",
- "indexmap",
+ "indexmap 2.2.6",
  "log",
  "memchr",
  "once_cell",
@@ -3112,6 +3211,12 @@ dependencies = [
  "unicode-normalization",
 ]
 
+[[package]]
+name = "strsim"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
+
 [[package]]
 name = "subtle"
 version = "2.5.0"
@@ -3381,7 +3486,7 @@ version = "0.22.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d3328d4f68a705b2a4498da1d580585d39a6510f98318a2cec3018a7ec61ddef"
 dependencies = [
- "indexmap",
+ "indexmap 2.2.6",
  "serde",
  "serde_spanned",
  "toml_datetime",
@@ -3570,6 +3675,25 @@ version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8ecb6da28b8a351d773b68d5825ac39017e680750f980f3a1a85cd8dd28a47c1"
 
+[[package]]
+name = "ureq"
+version = "2.9.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d11a831e3c0b56e438a28308e7c810799e3c118417f342d30ecec080105395cd"
+dependencies = [
+ "base64 0.22.0",
+ "flate2",
+ "log",
+ "once_cell",
+ "rustls",
+ "rustls-pki-types",
+ "rustls-webpki",
+ "serde",
+ "serde_json",
+ "url",
+ "webpki-roots",
+]
+
 [[package]]
 name = "url"
 version = "2.5.0"
@@ -3635,9 +3759,12 @@ dependencies = [
  "pretty_env_logger",
  "rocket",
  "serde",
+ "serde_with",
  "sha2",
  "sqlx",
  "tokio",
+ "ureq",
+ "url",
  "uuid",
 ]
 
@@ -4073,6 +4200,6 @@ dependencies = [
  "crc32fast",
  "crossbeam-utils",
  "displaydoc",
- "indexmap",
+ "indexmap 2.2.6",
  "thiserror",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index f946aba..7d99a57 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,3 +26,6 @@ blurhash = "0.2.1"
 candle-core = { git = "https://github.com/huggingface/candle.git", version = "0.5.1" }
 candle-nn = { git = "https://github.com/huggingface/candle.git", version = "0.5.1" }
 candle-transformers = { git = "https://github.com/huggingface/candle.git", version = "0.5.1" }
+ureq = { version = "2.9.7", features = ["json"] }
+url = "2.5.0"
+serde_with = { version = "3.8.1", features = ["hex"] }
diff --git a/config.toml b/config.toml
index 40cf28d..d965c9e 100644
--- a/config.toml
+++ b/config.toml
@@ -16,5 +16,8 @@ public_url = "http://localhost:8000"
 # Whitelisted pubkeys, leave out to disable
 # whitelist = ["63fe6318dc58583cfe16810f86dd09e18bfd76aabc24a0081ce2856f330504ed"]
 
-# Path for ViT image model (https://huggingface.co/google/vit-base-patch16-224)
-# vit_model_path = "model.safetennsors"
\ No newline at end of file
+# Path for ViT(224) image model (https://huggingface.co/google/vit-base-patch16-224)
+# vit_model_path = "model.safetennsors"
+
+# Webhook api endpoint
+webhook_url = "https://api.snort.social/api/v1/media/webhook"
\ No newline at end of file
diff --git a/src/filesystem.rs b/src/filesystem.rs
index cc69e75..112f2bf 100644
--- a/src/filesystem.rs
+++ b/src/filesystem.rs
@@ -2,11 +2,12 @@ use std::env::temp_dir;
 use std::fs;
 use std::io::SeekFrom;
 use std::path::{Path, PathBuf};
-use std::sync::{Arc, Mutex};
 use std::time::SystemTime;
 
 use anyhow::Error;
 use log::info;
+use serde::Serialize;
+use serde_with::serde_as;
 use sha2::{Digest, Sha256};
 use tokio::fs::File;
 use tokio::io::{AsyncRead, AsyncReadExt, AsyncSeekExt};
@@ -15,9 +16,11 @@ use crate::processing::{compress_file, FileProcessorResult};
 use crate::processing::labeling::label_frame;
 use crate::settings::Settings;
 
-#[derive(Clone, Default)]
+#[serde_as]
+#[derive(Clone, Default, Serialize)]
 pub struct FileSystemResult {
     pub path: PathBuf,
+    #[serde_as(as = "serde_with::hex::Hex")]
     pub sha256: Vec<u8>,
     pub size: u64,
     pub mime_type: String,
@@ -51,8 +54,11 @@ impl FileStore {
         let result = self.store_compress_file(stream, mime_type, compress).await?;
         let dst_path = self.map_path(&result.sha256);
         if dst_path.exists() {
-            fs::remove_file(&result.path)?;
-            return Err(Error::msg("File already exists"));
+            fs::remove_file(result.path)?;
+            return Ok(FileSystemResult {
+                path: dst_path,
+                ..result
+            });
         }
         fs::create_dir_all(dst_path.parent().unwrap())?;
         if let Err(e) = fs::copy(&result.path, &dst_path) {
diff --git a/src/main.rs b/src/main.rs
index 5f11dda..67db18b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -13,6 +13,7 @@ use crate::db::Database;
 use crate::filesystem::FileStore;
 use crate::routes::{get_blob, head_blob, root};
 use crate::settings::Settings;
+use crate::webhook::Webhook;
 
 mod auth;
 mod blob;
@@ -22,6 +23,7 @@ mod filesystem;
 mod routes;
 mod settings;
 mod processing;
+mod webhook;
 
 #[rocket::main]
 async fn main() -> Result<(), Error> {
@@ -58,6 +60,7 @@ async fn main() -> Result<(), Error> {
         .manage(FileStore::new(settings.clone()))
         .manage(settings.clone())
         .manage(db.clone())
+        .manage(settings.webhook_url.as_ref().map(|w| Webhook::new(w.clone())))
         .attach(CORS)
         .attach(Shield::new()) // disable
         .mount("/", routes::blossom_routes())
diff --git a/src/routes/blossom.rs b/src/routes/blossom.rs
index d8a6373..0587666 100644
--- a/src/routes/blossom.rs
+++ b/src/routes/blossom.rs
@@ -17,6 +17,7 @@ use crate::db::{Database, FileUpload};
 use crate::filesystem::FileStore;
 use crate::routes::delete_file;
 use crate::settings::Settings;
+use crate::webhook::Webhook;
 
 #[derive(Serialize, Deserialize)]
 struct BlossomError {
@@ -82,6 +83,7 @@ async fn upload(
     fs: &State<FileStore>,
     db: &State<Database>,
     settings: &State<Settings>,
+    webhook: &State<Option<Webhook>>,
     data: Data<'_>,
 ) -> BlossomResponse {
     if !check_method(&auth.event, "upload") {
@@ -122,6 +124,18 @@ async fn upload(
     {
         Ok(blob) => {
             let pubkey_vec = auth.event.pubkey.to_bytes().to_vec();
+            if let Some(wh) = webhook.as_ref() {
+                match wh.store_file(&pubkey_vec, blob.clone()) {
+                    Ok(store) => if !store {
+                        let _ = fs::remove_file(blob.path);
+                        return BlossomResponse::error("Upload rejected");
+                    }
+                    Err(e) => {
+                        let _ = fs::remove_file(blob.path);
+                        return BlossomResponse::error(format!("Internal error, failed to call webhook: {}", e));
+                    }
+                }
+            }
             let user_id = match db.upsert_user(&pubkey_vec).await {
                 Ok(u) => u,
                 Err(e) => {
diff --git a/src/routes/nip96.rs b/src/routes/nip96.rs
index fa20561..6908764 100644
--- a/src/routes/nip96.rs
+++ b/src/routes/nip96.rs
@@ -14,6 +14,7 @@ use crate::db::{Database, FileUpload};
 use crate::filesystem::FileStore;
 use crate::routes::delete_file;
 use crate::settings::Settings;
+use crate::webhook::Webhook;
 
 #[derive(Serialize, Default)]
 #[serde(crate = "rocket::serde")]
@@ -152,6 +153,7 @@ async fn upload(
     fs: &State<FileStore>,
     db: &State<Database>,
     settings: &State<Settings>,
+    webhook: &State<Option<Webhook>>,
     form: Form<Nip96Form<'_>>,
 ) -> Nip96Response {
     if let Some(size) = auth.content_length {
@@ -178,6 +180,18 @@ async fn upload(
     {
         Ok(blob) => {
             let pubkey_vec = auth.event.pubkey.to_bytes().to_vec();
+            if let Some(wh) = webhook.as_ref() {
+                match wh.store_file(&pubkey_vec, blob.clone()) {
+                    Ok(store) => if !store {
+                        let _ = fs::remove_file(blob.path);
+                        return Nip96Response::error("Upload rejected");
+                    }
+                    Err(e) => {
+                        let _ = fs::remove_file(blob.path);
+                        return Nip96Response::error(&format!("Internal error, failed to call webhook: {}", e));
+                    }
+                }
+            }
             let user_id = match db.upsert_user(&pubkey_vec).await {
                 Ok(u) => u,
                 Err(e) => return Nip96Response::error(&format!("Could not save user: {}", e)),
diff --git a/src/settings.rs b/src/settings.rs
index 21af902..33cc67d 100644
--- a/src/settings.rs
+++ b/src/settings.rs
@@ -22,5 +22,8 @@ pub struct Settings {
     pub whitelist: Option<Vec<String>>,
     
     /// Path for ViT image model
-    pub vit_model_path: Option<PathBuf>
+    pub vit_model_path: Option<PathBuf>,
+    
+    /// Webhook api endpoint
+    pub webhook_url: Option<String>,
 }
diff --git a/src/webhook.rs b/src/webhook.rs
new file mode 100644
index 0000000..fde836f
--- /dev/null
+++ b/src/webhook.rs
@@ -0,0 +1,41 @@
+use anyhow::Error;
+use serde::{Deserialize, Serialize};
+
+use crate::filesystem::FileSystemResult;
+
+pub(crate) struct Webhook {
+    url: String,
+}
+
+#[derive(Serialize, Deserialize)]
+struct WebhookRequest<T> {
+    pub action: String,
+    pub subject: Option<String>,
+    pub payload: T,
+}
+
+impl Webhook {
+    pub fn new(url: String) -> Self {
+        Self {
+            url
+        }
+    }
+
+    /// Ask webhook api if this file can be accepted
+    pub fn store_file(&self, pubkey: &Vec<u8>, fs: FileSystemResult) -> Result<bool, Error> {
+        let body: WebhookRequest<FileSystemResult> = WebhookRequest {
+            action: "store_file".to_string(),
+            subject: Some(hex::encode(pubkey)),
+            payload: fs,
+        };
+        let req = ureq::post(&self.url)
+            .set("accept", "application/json")
+            .send_json(body)?;
+
+        if req.status() == 200 {
+            Ok(true)
+        } else {
+            Ok(false)
+        }
+    }
+}
\ No newline at end of file