diff --git a/rustfs/src/app/context.rs b/rustfs/src/app/context.rs
index 0d5688c0b..ae32edd80 100644
--- a/rustfs/src/app/context.rs
+++ b/rustfs/src/app/context.rs
@@ -20,11 +20,13 @@ mod global;
 mod handles;
 mod interfaces;
 mod runtime_sources;
+mod server_slot;
 mod startup;
 
 pub use global::*;
 pub use handles::*;
 pub use interfaces::*;
+pub use server_slot::ServerContextSlot;
 
 use super::storage_api::context::bucket::metadata_sys::BucketMetadataSys;
 use super::storage_api::context::runtime::{
@@ -1216,6 +1218,7 @@ mod tests {
         assert_eq!(context_server_config_published.load(Ordering::SeqCst), 1);
         assert!(publish_storage_class_config_with(Some(context.clone()), StorageClassConfig::default()));
         assert_eq!(context_storage_class_published.load(Ordering::SeqCst), 1);
+        let slot_context = context.clone();
         assert_eq!(
             resolve_buffer_config_with(Some(context))
                 .expect("context buffer config")
@@ -1258,5 +1261,19 @@ mod tests {
         assert!(!publish_server_config_with(None, Config::new()));
         assert!(!publish_storage_class_config_with(None, StorageClassConfig::default()));
         assert!(resolve_buffer_config_with(None).is_none());
+
+        // backlog#1052 S2: a per-server context slot resolves its *installed*
+        // context — not whatever another server installed — and the first
+        // installation wins.
+        let slot = ServerContextSlot::new();
+        assert!(slot.install(slot_context.clone()), "first install must succeed");
+        assert!(!slot.install(slot_context.clone()), "the slot is install-once");
+        let resolved = slot.app_context().expect("installed slot must resolve its context");
+        assert!(Arc::ptr_eq(&resolved, &slot_context), "the slot must hand back the installed context");
+        let resolved_store = slot.object_store().expect("installed slot must resolve the store");
+        assert!(
+            Arc::ptr_eq(&resolved_store, &slot_context.object_store()),
+            "the slot must dispatch to the installed context's store"
+        );
     }
 }
diff --git a/rustfs/src/app/context/server_slot.rs b/rustfs/src/app/context/server_slot.rs
new file mode 100644
index 000000000..34f6f1ee4
--- /dev/null
+++ b/rustfs/src/app/context/server_slot.rs
@@ -0,0 +1,88 @@
+// Copyright 2024 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! Per-server application-context slot (backlog#1052 S2).
+//!
+//! The S3 service starts serving before storage and IAM finish initializing,
+//! so a server cannot hold its `AppContext` at construction time. This slot is
+//! the late-bound carrier: startup creates one per server, hands it to the
+//! request-path owners (the `FS` service), and installs the `AppContext` into
+//! it once IAM bootstrap completes.
+//!
+//! Until every app subsystem is per-server (backlog#1052 S3), resolution falls
+//! back to the process-global `AppContext` singleton when the slot has not
+//! been installed — byte-for-byte the ambient resolution the request path used
+//! before this seam existed. The fallback is removed when multi-instance flips
+//! on (backlog#1052 S5).
+
+use super::global::{AppContext, get_global_app_context};
+use crate::app::storage_api::context::ECStore;
+use std::sync::{Arc, OnceLock};
+
+/// Late-bound, per-server handle to the application context.
+#[derive(Default)]
+pub struct ServerContextSlot {
+    app_context: OnceLock<Arc<AppContext>>,
+}
+
+// Manual Debug: AppContext is not Debug, so summarize installation state.
+impl std::fmt::Debug for ServerContextSlot {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("ServerContextSlot")
+            .field("app_context_installed", &self.app_context.get().is_some())
+            .finish()
+    }
+}
+
+impl ServerContextSlot {
+    pub fn new() -> Arc<Self> {
+        Arc::new(Self {
+            app_context: OnceLock::new(),
+        })
+    }
+
+    /// Install this server's application context (once). Returns `false` if
+    /// the slot was already installed; the first installation wins, matching
+    /// the process-global singleton's `get_or_init` semantics.
+    pub fn install(&self, context: Arc<AppContext>) -> bool {
+        self.app_context.set(context).is_ok()
+    }
+
+    /// This server's application context: the installed one, or the
+    /// process-global singleton as the single-instance legacy default.
+    pub fn app_context(&self) -> Option<Arc<AppContext>> {
+        self.app_context.get().cloned().or_else(get_global_app_context)
+    }
+
+    /// This server's object store, resolved through [`Self::app_context`].
+    pub fn object_store(&self) -> Option<Arc<ECStore>> {
+        self.app_context().map(|context| context.object_store())
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::{ServerContextSlot, get_global_app_context};
+
+    // Before anything is installed — and with no global AppContext in this
+    // process (nextest runs each test in its own process) — resolution yields
+    // nothing: the same "not ready yet" answer the ambient path gives before
+    // IAM bootstrap completes.
+    #[test]
+    fn empty_slot_resolves_like_the_ambient_path() {
+        let slot = ServerContextSlot::new();
+        assert_eq!(slot.app_context().is_some(), get_global_app_context().is_some());
+        assert_eq!(slot.object_store().is_some(), get_global_app_context().is_some());
+    }
+}
diff --git a/rustfs/src/app/context/startup.rs b/rustfs/src/app/context/startup.rs
index f726c82be..7808e6e4d 100644
--- a/rustfs/src/app/context/startup.rs
+++ b/rustfs/src/app/context/startup.rs
@@ -15,6 +15,7 @@
 use super::super::storage_api::context::ECStore;
 use super::global::{AppContext, get_global_app_context, init_global_app_context};
 use super::runtime_sources;
+use super::server_slot::ServerContextSlot;
 use rustfs_kms::KmsServiceManager;
 use std::io::{Error, Result};
 use std::sync::Arc;
@@ -30,7 +31,11 @@ impl AppContext {
         ensure_startup_kms_interface_with(runtime_sources::kms_service_manager, runtime_sources::init_kms_service_manager)
     }
 
-    pub(crate) fn ensure_startup_after_iam(store: Arc<ECStore>, kms_interface: Arc<KmsServiceManager>) -> Result<()> {
+    pub(crate) fn ensure_startup_after_iam(
+        store: Arc<ECStore>,
+        kms_interface: Arc<KmsServiceManager>,
+        server_ctx: &ServerContextSlot,
+    ) -> Result<()> {
         ensure_startup_app_context_after_iam_with(
             || get_global_app_context().is_some(),
             || {
@@ -40,6 +45,12 @@ impl AppContext {
                 Ok(())
             },
         )?;
+        // Install this server's context slot (backlog#1052 S2). Today the
+        // context is still the process singleton, so the slot mirrors it;
+        // once contexts become per-server (S3) this hands each server its own.
+        if let Some(context) = get_global_app_context() {
+            let _ = server_ctx.install(context);
+        }
         Ok(())
     }
 }
diff --git a/rustfs/src/runtime_sources.rs b/rustfs/src/runtime_sources.rs
index 5a2c0ed5a..f725e238f 100644
--- a/rustfs/src/runtime_sources.rs
+++ b/rustfs/src/runtime_sources.rs
@@ -16,7 +16,7 @@ use crate::app::context;
 use std::sync::Arc;
 
 pub(crate) use context::{
-    AppContext, NotifyInterface, default_notify_interface as fallback_notify_interface,
+    AppContext, NotifyInterface, ServerContextSlot, default_notify_interface as fallback_notify_interface,
     default_object_data_cache_handle as fallback_object_data_cache_handle,
     default_outbound_tls_runtime_interface as fallback_outbound_tls_runtime_interface,
     default_s3select_db_interface as fallback_s3select_db_interface,
diff --git a/rustfs/src/server/http.rs b/rustfs/src/server/http.rs
index cf17872ce..ba6dd4ae6 100644
--- a/rustfs/src/server/http.rs
+++ b/rustfs/src/server/http.rs
@@ -34,7 +34,7 @@ use crate::storage_api::server::http as storage;
 use crate::storage_api::server::http::request_context::{RequestContext, extract_request_id_from_headers};
 use crate::storage_api::server::http::rpc::InternodeRpcService;
 use crate::storage_api::server::http::tonic_service::make_server;
-use crate::storage_api::server::http::{TONIC_RPC_PREFIX, verify_rpc_signature};
+use crate::storage_api::server::http::{ServerContextSlot, TONIC_RPC_PREFIX, verify_rpc_signature};
 use bytes::Bytes;
 use http::{HeaderMap, Method, Request as HttpRequest, Response};
 use hyper::body::Incoming;
@@ -331,7 +331,11 @@ fn trace_on_response<ResBody>(response: &Response<ResBody>, latency: Duration, s
     }
 }
 
-pub async fn start_http_server(config: &config::Config, readiness: Arc<GlobalReadiness>) -> Result<(ShutdownHandle, SocketAddr)> {
+pub async fn start_http_server(
+    config: &config::Config,
+    readiness: Arc<GlobalReadiness>,
+    server_ctx: Arc<ServerContextSlot>,
+) -> Result<(ShutdownHandle, SocketAddr)> {
     let server_addr = parse_and_resolve_address(config.address.as_str()).map_err(Error::other)?;
 
     // The listening address and port are obtained from the parameters
@@ -598,7 +602,9 @@ pub async fn start_http_server(config: &config::Config, readiness: Arc<GlobalRea
     // Setup S3 service
     // This project uses the S3S library to implement S3 services
     let s3_service = {
-        let store = storage::ecfs::FS::new();
+        // Bind the S3 service to this server's context slot (backlog#1052 S2)
+        // so request dispatch resolves the server's own store.
+        let store = storage::ecfs::FS::with_server_ctx(server_ctx);
         let mut b = S3ServiceBuilder::new(store.clone());
 
         let access_key = config.access_key.clone();
diff --git a/rustfs/src/startup_embedded.rs b/rustfs/src/startup_embedded.rs
index 0a34481d0..22e886334 100644
--- a/rustfs/src/startup_embedded.rs
+++ b/rustfs/src/startup_embedded.rs
@@ -24,6 +24,7 @@ use crate::{
     startup_services::init_embedded_startup_runtime_services,
     startup_shutdown::signal_embedded_startup_shutdown,
     startup_storage::{init_embedded_startup_storage_foundation, init_embedded_startup_storage_runtime},
+    storage_api::server::http::ServerContextSlot,
     storage_api::startup::storage::bootstrap_instance_ctx,
 };
 use std::{io, net::SocketAddr, path::PathBuf};
@@ -114,6 +115,8 @@ pub(crate) async fn run_embedded_startup(args: EmbeddedStartupArgs) -> Result<Em
     // are per-server too (backlog#1052 S2–S4), each server constructs its own
     // context here instead.
     let instance_ctx = bootstrap_instance_ctx();
+    // This server's request-path context slot (backlog#1052 S2).
+    let server_ctx = ServerContextSlot::new();
 
     let EmbeddedStartupConfig {
         config,
@@ -139,7 +142,7 @@ pub(crate) async fn run_embedded_startup(args: EmbeddedStartupArgs) -> Result<Em
         .await
         .map_err(init_error)?;
 
-    let http_server = start_embedded_http_server(&config, listen_context.readiness.clone()).await?;
+    let http_server = start_embedded_http_server(&config, listen_context.readiness.clone(), server_ctx.clone()).await?;
     let shutdown_handle = http_server.shutdown_handle;
     let bound_addr = http_server.bound_addr;
     let cancel_token = CancellationToken::new();
@@ -166,6 +169,7 @@ pub(crate) async fn run_embedded_startup(args: EmbeddedStartupArgs) -> Result<Em
         storage_runtime.store,
         cancel_token.clone(),
         listen_context.readiness.clone(),
+        server_ctx,
     )
     .await
     .map_err(|err| {
diff --git a/rustfs/src/startup_entrypoint.rs b/rustfs/src/startup_entrypoint.rs
index ee46d522d..f11fac12f 100644
--- a/rustfs/src/startup_entrypoint.rs
+++ b/rustfs/src/startup_entrypoint.rs
@@ -19,6 +19,7 @@ use crate::{
     startup_server::{StartupHttpServers, StartupListenContext, init_startup_http_servers, init_startup_listen_context},
     startup_services::init_startup_runtime_services,
     startup_storage::{StartupStorageRuntime, init_startup_storage_foundation, init_startup_storage_runtime},
+    storage_api::server::http::ServerContextSlot,
     storage_api::startup::storage::bootstrap_instance_ctx,
 };
 use std::io::{Error, Result};
@@ -108,6 +109,9 @@ async fn run(config: Config) -> Result<()> {
     // the storage path explicitly (Phase 5 follow-up, backlog#1052); a future
     // multi-instance server constructs its own context here instead.
     let instance_ctx = bootstrap_instance_ctx();
+    // This server's request-path context slot (backlog#1052 S2): handed to the
+    // HTTP service now, installed once IAM bootstrap completes.
+    let server_ctx = ServerContextSlot::new();
 
     let StartupListenContext {
         readiness,
@@ -120,7 +124,7 @@ async fn run(config: Config) -> Result<()> {
         state_manager,
         s3_shutdown_tx,
         console_shutdown_tx,
-    } = init_startup_http_servers(&config, readiness.clone()).await?;
+    } = init_startup_http_servers(&config, readiness.clone(), server_ctx.clone()).await?;
 
     let StartupStorageRuntime {
         store,
@@ -134,6 +138,7 @@ async fn run(config: Config) -> Result<()> {
         ctx.clone(),
         readiness.clone(),
         state_manager.clone(),
+        server_ctx,
     )
     .await?;
 
diff --git a/rustfs/src/startup_iam.rs b/rustfs/src/startup_iam.rs
index b98521dcf..473fb87be 100644
--- a/rustfs/src/startup_iam.rs
+++ b/rustfs/src/startup_iam.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::runtime_sources::AppContext;
+use crate::runtime_sources::{AppContext, ServerContextSlot};
 use crate::server::{ServiceStateManager, publish_ready_when_runtime_ready};
 use crate::storage_api::startup::iam::ECStore;
 use rustfs_common::{GlobalReadiness, SystemStage};
@@ -76,8 +76,9 @@ async fn finalize_iam_recovery(
     kms_interface: Arc<KmsServiceManager>,
     readiness: Arc<GlobalReadiness>,
     state_manager: Option<Arc<ServiceStateManager>>,
+    server_ctx: Arc<ServerContextSlot>,
 ) -> Result<()> {
-    AppContext::ensure_startup_after_iam(store, kms_interface)?;
+    AppContext::ensure_startup_after_iam(store, kms_interface, &server_ctx)?;
 
     readiness.mark_stage(SystemStage::IamReady);
     publish_ready_when_runtime_ready(readiness.as_ref(), state_manager.as_deref()).await
@@ -90,6 +91,7 @@ fn compute_backoff_interval(attempt: u64, initial: Duration, max: Duration) -> D
     if backoff > max { max } else { backoff }
 }
 
+#[allow(clippy::too_many_arguments)]
 fn spawn_iam_recovery_task(
     initial_interval: Duration,
     max_interval: Duration,
@@ -98,12 +100,14 @@ fn spawn_iam_recovery_task(
     kms_interface: Arc<KmsServiceManager>,
     readiness: Arc<GlobalReadiness>,
     state_manager: Option<Arc<ServiceStateManager>>,
+    server_ctx: Arc<ServerContextSlot>,
 ) {
     let init_store = store.clone();
     let finalize_store = store;
     let finalize_kms_interface = kms_interface;
     let finalize_readiness = readiness;
     let finalize_state_manager = state_manager;
+    let finalize_server_ctx = server_ctx;
     tokio::spawn(async move {
         run_iam_recovery_loop(
             initial_interval,
@@ -118,7 +122,8 @@ fn spawn_iam_recovery_task(
                 let kms_interface = finalize_kms_interface.clone();
                 let readiness = finalize_readiness.clone();
                 let state_manager = finalize_state_manager.clone();
-                Box::pin(async move { finalize_iam_recovery(store, kms_interface, readiness, state_manager).await })
+                let server_ctx = finalize_server_ctx.clone();
+                Box::pin(async move { finalize_iam_recovery(store, kms_interface, readiness, state_manager, server_ctx).await })
             },
         )
         .await;
@@ -333,10 +338,11 @@ pub(crate) async fn bootstrap_or_defer_iam_init(
     readiness: Arc<GlobalReadiness>,
     state_manager: Option<Arc<ServiceStateManager>>,
     shutdown_token: Option<tokio_util::sync::CancellationToken>,
+    server_ctx: Arc<ServerContextSlot>,
 ) -> Result<IamBootstrapDisposition> {
     match attempt_init_iam_sys(store.clone()).await {
         Ok(()) => {
-            AppContext::ensure_startup_after_iam(store, kms_interface)?;
+            AppContext::ensure_startup_after_iam(store, kms_interface, &server_ctx)?;
             readiness.mark_stage(SystemStage::IamReady);
             return Ok(IamBootstrapDisposition::ReadyInline);
         }
@@ -362,6 +368,7 @@ pub(crate) async fn bootstrap_or_defer_iam_init(
                 kms_interface,
                 readiness,
                 state_manager,
+                server_ctx,
             );
         }
     }
@@ -374,17 +381,19 @@ pub(crate) async fn bootstrap_or_defer_iam_init_with_startup_kms(
     readiness: Arc<GlobalReadiness>,
     state_manager: Option<Arc<ServiceStateManager>>,
     shutdown_token: Option<tokio_util::sync::CancellationToken>,
+    server_ctx: Arc<ServerContextSlot>,
 ) -> Result<IamBootstrapDisposition> {
     let kms_interface = AppContext::ensure_startup_kms_interface();
-    bootstrap_or_defer_iam_init(store, kms_interface, readiness, state_manager, shutdown_token).await
+    bootstrap_or_defer_iam_init(store, kms_interface, readiness, state_manager, shutdown_token, server_ctx).await
 }
 
 pub(crate) async fn init_embedded_iam_runtime(
     store: Arc<ECStore>,
     ctx: tokio_util::sync::CancellationToken,
     readiness: Arc<GlobalReadiness>,
+    server_ctx: Arc<ServerContextSlot>,
 ) -> Result<IamBootstrapDisposition> {
-    bootstrap_or_defer_iam_init_with_startup_kms(store, readiness, None, Some(ctx)).await
+    bootstrap_or_defer_iam_init_with_startup_kms(store, readiness, None, Some(ctx), server_ctx).await
 }
 
 pub(crate) async fn init_iam_runtime(
@@ -392,8 +401,9 @@ pub(crate) async fn init_iam_runtime(
     ctx: tokio_util::sync::CancellationToken,
     readiness: Arc<GlobalReadiness>,
     state_manager: Arc<ServiceStateManager>,
+    server_ctx: Arc<ServerContextSlot>,
 ) -> Result<IamBootstrapDisposition> {
-    bootstrap_or_defer_iam_init_with_startup_kms(store, readiness, Some(state_manager), Some(ctx)).await
+    bootstrap_or_defer_iam_init_with_startup_kms(store, readiness, Some(state_manager), Some(ctx), server_ctx).await
 }
 
 #[cfg(test)]
diff --git a/rustfs/src/startup_server.rs b/rustfs/src/startup_server.rs
index 4fe60fbac..2fd2958f1 100644
--- a/rustfs/src/startup_server.rs
+++ b/rustfs/src/startup_server.rs
@@ -17,6 +17,7 @@ use crate::{
     config::Config,
     server::{ServiceState, ServiceStateManager, ShutdownHandle, start_http_server},
     startup_runtime_sources,
+    storage_api::server::http::ServerContextSlot,
     storage_api::startup::runtime_sources::InstanceContext,
 };
 use rustfs_common::GlobalReadiness;
@@ -231,9 +232,13 @@ pub(crate) async fn init_embedded_startup_listen_context(
     })
 }
 
-pub(crate) async fn start_embedded_http_server(config: &Config, readiness: Arc<GlobalReadiness>) -> Result<EmbeddedHttpServer> {
+pub(crate) async fn start_embedded_http_server(
+    config: &Config,
+    readiness: Arc<GlobalReadiness>,
+    server_ctx: Arc<ServerContextSlot>,
+) -> Result<EmbeddedHttpServer> {
     let s3_config = s3_http_server_config(config);
-    let (shutdown_handle, bound_addr) = start_http_server(&s3_config, readiness).await?;
+    let (shutdown_handle, bound_addr) = start_http_server(&s3_config, readiness, server_ctx).await?;
 
     Ok(EmbeddedHttpServer {
         shutdown_handle,
@@ -241,16 +246,22 @@ pub(crate) async fn start_embedded_http_server(config: &Config, readiness: Arc<G
     })
 }
 
-pub(crate) async fn init_startup_http_servers(config: &Config, readiness: Arc<GlobalReadiness>) -> Result<StartupHttpServers> {
+pub(crate) async fn init_startup_http_servers(
+    config: &Config,
+    readiness: Arc<GlobalReadiness>,
+    server_ctx: Arc<ServerContextSlot>,
+) -> Result<StartupHttpServers> {
     init_capacity_management().await;
     let state_manager = Arc::new(ServiceStateManager::new());
     state_manager.update(ServiceState::Starting);
 
     let s3_config = s3_http_server_config(config);
-    let (s3_shutdown_tx, _) = start_http_server(&s3_config, readiness.clone()).await?;
+    let (s3_shutdown_tx, _) = start_http_server(&s3_config, readiness.clone(), server_ctx.clone()).await?;
 
     let console_shutdown_tx = match console_http_server_config(config) {
-        Some(console_config) => Some(start_http_server(&console_config, readiness).await?.0),
+        // The console shares the S3 server's context slot: it is the same
+        // logical server on a second listener.
+        Some(console_config) => Some(start_http_server(&console_config, readiness, server_ctx).await?.0),
         None => None,
     };
 
diff --git a/rustfs/src/startup_services.rs b/rustfs/src/startup_services.rs
index 34ae92c3c..73988839b 100644
--- a/rustfs/src/startup_services.rs
+++ b/rustfs/src/startup_services.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::storage_api::startup::services::{ECStore, EndpointServerPools};
+use crate::storage_api::startup::services::{ECStore, EndpointServerPools, ServerContextSlot};
 use crate::{
     config::Config,
     init::{init_buffer_profile_system, init_kms_system},
@@ -48,10 +48,11 @@ pub(crate) async fn init_embedded_startup_runtime_services(
     store: Arc<ECStore>,
     ctx: CancellationToken,
     readiness: Arc<GlobalReadiness>,
+    server_ctx: Arc<ServerContextSlot>,
 ) -> Result<EmbeddedStartupServiceRuntime> {
     init_embedded_optional_service_runtime(config).await;
     let buckets = init_embedded_bucket_metadata_runtime(store.clone()).await?;
-    let iam_bootstrap = init_embedded_iam_runtime(store, ctx, readiness)
+    let iam_bootstrap = init_embedded_iam_runtime(store, ctx, readiness, server_ctx)
         .await
         .map_err(|err| std::io::Error::other(format!("IAM bootstrap setup: {err}")))?;
     init_embedded_notification_runtime(endpoint_pools, buckets).await;
@@ -66,6 +67,7 @@ pub(crate) async fn init_startup_runtime_services(
     ctx: CancellationToken,
     readiness: Arc<GlobalReadiness>,
     state_manager: Arc<ServiceStateManager>,
+    server_ctx: Arc<ServerContextSlot>,
 ) -> Result<StartupServiceRuntime> {
     init_kms_system(config).await?;
 
@@ -76,7 +78,7 @@ pub(crate) async fn init_startup_runtime_services(
     init_deadlock_detector_runtime();
 
     let buckets = init_bucket_metadata_runtime(store.clone(), ctx.clone()).await?;
-    let iam_bootstrap = init_iam_runtime(store.clone(), ctx.clone(), readiness, state_manager).await?;
+    let iam_bootstrap = init_iam_runtime(store.clone(), ctx.clone(), readiness, state_manager, server_ctx).await?;
     init_auth_integrations().await?;
     init_notification_runtime(endpoint_pools, buckets).await?;
     let enable_scanner = init_background_service_runtime(store.clone()).await?;
diff --git a/rustfs/src/storage/ecfs.rs b/rustfs/src/storage/ecfs.rs
index 70f10b4c2..a795bf8e6 100644
--- a/rustfs/src/storage/ecfs.rs
+++ b/rustfs/src/storage/ecfs.rs
@@ -60,7 +60,13 @@ use crate::storage::storage_api::ecfs_consumer::StorageObjectOptions as ObjectOp
 
 #[derive(Debug, Clone)]
 pub struct FS {
-    // pub store: ECStore,
+    /// This server's late-bound application-context slot (backlog#1052 S2).
+    ///
+    /// Handlers resolve the object store through this slot instead of the
+    /// ambient process singleton, so each server dispatches requests to its
+    /// own store once contexts become per-server. An uninstalled slot falls
+    /// back to the global `AppContext` — the single-instance legacy default.
+    server_ctx: std::sync::Arc<runtime_sources::ServerContextSlot>,
 }
 
 #[derive(Debug, Default, serde::Deserialize)]
@@ -77,9 +83,16 @@ impl Default for FS {
 
 impl FS {
     pub fn new() -> Self {
+        Self::with_server_ctx(runtime_sources::ServerContextSlot::new())
+    }
+
+    /// Build the service bound to an explicit per-server context slot
+    /// (backlog#1052 S2). [`FS::new`] hands out a fresh, never-installed slot,
+    /// which resolves through the global fallback — the legacy behavior.
+    pub(crate) fn with_server_ctx(server_ctx: std::sync::Arc<runtime_sources::ServerContextSlot>) -> Self {
         rustfs_io_metrics::init_s3_metrics();
         rustfs_io_metrics::init_list_objects_metrics();
-        Self {}
+        Self { server_ctx }
     }
 
     async fn replication_tagging_enabled(bucket: &str, object: &str) -> bool {
@@ -102,7 +115,7 @@ impl FS {
         object: &str,
         version_id: Option<&str>,
     ) -> S3Result<std::collections::HashMap<String, Vec<String>>> {
-        let Some(store) = runtime_sources::current_object_store_handle() else {
+        let Some(store) = self.server_ctx.object_store() else {
             return Ok(std::collections::HashMap::new());
         };
         let opts = ObjectOptions {
@@ -348,7 +361,7 @@ impl S3 for FS {
         &self,
         req: S3Request<DeleteBucketWebsiteInput>,
     ) -> S3Result<S3Response<DeleteBucketWebsiteOutput>> {
-        let Some(store) = runtime_sources::current_object_store_handle() else {
+        let Some(store) = self.server_ctx.object_store() else {
             return Err(s3_error!(InternalError, "Not init"));
         };
 
@@ -398,7 +411,7 @@ impl S3 for FS {
 
         validate_table_catalog_object_mutation(&bucket, &object).await?;
 
-        let Some(store) = runtime_sources::current_object_store_handle() else {
+        let Some(store) = self.server_ctx.object_store() else {
             error!(
                 component = LOG_COMPONENT_STORAGE,
                 subsystem = LOG_SUBSYSTEM_TAGGING,
@@ -480,7 +493,7 @@ impl S3 for FS {
         record_s3_op(S3Operation::GetBucketAcl);
         let GetBucketAclInput { bucket, .. } = req.input;
 
-        let Some(store) = runtime_sources::current_object_store_handle() else {
+        let Some(store) = self.server_ctx.object_store() else {
             return Err(S3Error::with_message(S3ErrorCode::InternalError, "Not init".to_string()));
         };
 
@@ -496,7 +509,7 @@ impl S3 for FS {
         &self,
         req: S3Request<GetBucketAccelerateConfigurationInput>,
     ) -> S3Result<S3Response<GetBucketAccelerateConfigurationOutput>> {
-        let Some(store) = runtime_sources::current_object_store_handle() else {
+        let Some(store) = self.server_ctx.object_store() else {
             return Err(s3_error!(InternalError, "Not init"));
         };
 
@@ -586,7 +599,7 @@ impl S3 for FS {
         &self,
         req: S3Request<GetBucketRequestPaymentInput>,
     ) -> S3Result<S3Response<GetBucketRequestPaymentOutput>> {
-        let Some(store) = runtime_sources::current_object_store_handle() else {
+        let Some(store) = self.server_ctx.object_store() else {
             return Err(s3_error!(InternalError, "Not init"));
         };
 
@@ -634,7 +647,7 @@ impl S3 for FS {
     }
 
     async fn get_bucket_website(&self, req: S3Request<GetBucketWebsiteInput>) -> S3Result<S3Response<GetBucketWebsiteOutput>> {
-        let Some(store) = runtime_sources::current_object_store_handle() else {
+        let Some(store) = self.server_ctx.object_store() else {
             return Err(s3_error!(InternalError, "Not init"));
         };
 
@@ -673,7 +686,7 @@ impl S3 for FS {
             bucket, key, version_id, ..
         } = req.input;
 
-        let Some(store) = runtime_sources::current_object_store_handle() else {
+        let Some(store) = self.server_ctx.object_store() else {
             return Err(S3Error::with_message(S3ErrorCode::InternalError, "Not init".to_string()));
         };
 
@@ -703,7 +716,7 @@ impl S3 for FS {
             bucket, key, version_id, ..
         } = req.input.clone();
 
-        let Some(store) = runtime_sources::current_object_store_handle() else {
+        let Some(store) = self.server_ctx.object_store() else {
             return Err(S3Error::with_message(S3ErrorCode::InternalError, "Not init".to_string()));
         };
 
@@ -764,7 +777,7 @@ impl S3 for FS {
         record_s3_op(S3Operation::GetObjectLockConfiguration);
         let GetObjectLockConfigurationInput { bucket, .. } = req.input;
 
-        let Some(store) = runtime_sources::current_object_store_handle() else {
+        let Some(store) = self.server_ctx.object_store() else {
             return Err(S3Error::with_message(S3ErrorCode::InternalError, "Not init".to_string()));
         };
 
@@ -812,7 +825,7 @@ impl S3 for FS {
             bucket, key, version_id, ..
         } = req.input.clone();
 
-        let Some(store) = runtime_sources::current_object_store_handle() else {
+        let Some(store) = self.server_ctx.object_store() else {
             return Err(S3Error::with_message(S3ErrorCode::InternalError, "Not init".to_string()));
         };
 
@@ -864,7 +877,7 @@ impl S3 for FS {
         let bucket = req.input.bucket.as_str();
         let object = req.input.key.as_str();
 
-        let Some(store) = runtime_sources::current_object_store_handle() else {
+        let Some(store) = self.server_ctx.object_store() else {
             error!(
                 component = LOG_COMPONENT_STORAGE,
                 subsystem = LOG_SUBSYSTEM_TAGGING,
@@ -1008,7 +1021,7 @@ impl S3 for FS {
         } = req.input;
         record_s3_op(S3Operation::PutBucketAcl);
 
-        let Some(store) = runtime_sources::current_object_store_handle() else {
+        let Some(store) = self.server_ctx.object_store() else {
             return Err(S3Error::with_message(S3ErrorCode::InternalError, "Not init".to_string()));
         };
 
@@ -1031,7 +1044,7 @@ impl S3 for FS {
         &self,
         req: S3Request<PutBucketAccelerateConfigurationInput>,
     ) -> S3Result<S3Response<PutBucketAccelerateConfigurationOutput>> {
-        let Some(store) = runtime_sources::current_object_store_handle() else {
+        let Some(store) = self.server_ctx.object_store() else {
             return Err(s3_error!(InternalError, "Not init"));
         };
         store
@@ -1056,7 +1069,7 @@ impl S3 for FS {
 
     async fn get_bucket_logging(&self, req: S3Request<GetBucketLoggingInput>) -> S3Result<S3Response<GetBucketLoggingOutput>> {
         record_s3_op(S3Operation::GetBucketLogging);
-        let Some(store) = runtime_sources::current_object_store_handle() else {
+        let Some(store) = self.server_ctx.object_store() else {
             return Err(s3_error!(InternalError, "Not init"));
         };
         store
@@ -1075,7 +1088,7 @@ impl S3 for FS {
 
     async fn put_bucket_logging(&self, req: S3Request<PutBucketLoggingInput>) -> S3Result<S3Response<PutBucketLoggingOutput>> {
         record_s3_op(S3Operation::PutBucketLogging);
-        let Some(store) = runtime_sources::current_object_store_handle() else {
+        let Some(store) = self.server_ctx.object_store() else {
             return Err(s3_error!(InternalError, "Not init"));
         };
         store
@@ -1134,7 +1147,7 @@ impl S3 for FS {
         &self,
         req: S3Request<PutBucketRequestPaymentInput>,
     ) -> S3Result<S3Response<PutBucketRequestPaymentOutput>> {
-        let Some(store) = runtime_sources::current_object_store_handle() else {
+        let Some(store) = self.server_ctx.object_store() else {
             return Err(s3_error!(InternalError, "Not init"));
         };
         store
@@ -1176,7 +1189,7 @@ impl S3 for FS {
     }
 
     async fn put_bucket_website(&self, req: S3Request<PutBucketWebsiteInput>) -> S3Result<S3Response<PutBucketWebsiteOutput>> {
-        let Some(store) = runtime_sources::current_object_store_handle() else {
+        let Some(store) = self.server_ctx.object_store() else {
             return Err(s3_error!(InternalError, "Not init"));
         };
         store
@@ -1207,7 +1220,7 @@ impl S3 for FS {
         let key = &req.input.key;
         let version_id = req.input.version_id.clone();
 
-        let Some(store) = runtime_sources::current_object_store_handle() else {
+        let Some(store) = self.server_ctx.object_store() else {
             return Err(S3Error::with_message(S3ErrorCode::InternalError, "Not init".to_string()));
         };
 
@@ -1249,7 +1262,7 @@ impl S3 for FS {
 
         validate_table_catalog_object_mutation(&bucket, &key).await?;
 
-        let Some(store) = runtime_sources::current_object_store_handle() else {
+        let Some(store) = self.server_ctx.object_store() else {
             return Err(S3Error::with_message(S3ErrorCode::InternalError, "Not init".to_string()));
         };
 
@@ -1303,7 +1316,7 @@ impl S3 for FS {
 
         let Some(input_cfg) = object_lock_configuration else { return Err(s3_error!(InvalidArgument)) };
 
-        let Some(store) = runtime_sources::current_object_store_handle() else {
+        let Some(store) = self.server_ctx.object_store() else {
             return Err(S3Error::with_message(S3ErrorCode::InternalError, "Not init".to_string()));
         };
 
@@ -1398,7 +1411,7 @@ impl S3 for FS {
 
         validate_table_catalog_object_mutation(&bucket, &key).await?;
 
-        let Some(store) = runtime_sources::current_object_store_handle() else {
+        let Some(store) = self.server_ctx.object_store() else {
             return Err(S3Error::with_message(S3ErrorCode::InternalError, "Not init".to_string()));
         };
 
@@ -1477,7 +1490,7 @@ impl S3 for FS {
 
         crate::storage::s3_api::tagging::validate_object_tag_set(&tagging.tag_set)?;
 
-        let Some(store) = runtime_sources::current_object_store_handle() else {
+        let Some(store) = self.server_ctx.object_store() else {
             return Err(S3Error::with_message(S3ErrorCode::InternalError, "Not init".to_string()));
         };
 
diff --git a/rustfs/src/storage/runtime_sources.rs b/rustfs/src/storage/runtime_sources.rs
index 3abe96d7a..1d73cebed 100644
--- a/rustfs/src/storage/runtime_sources.rs
+++ b/rustfs/src/storage/runtime_sources.rs
@@ -22,7 +22,7 @@ use rustfs_kms::ObjectEncryptionService;
 use rustfs_lock::LockClient;
 use std::sync::Arc;
 
-pub(crate) use crate::runtime_sources::AppContext;
+pub(crate) use crate::runtime_sources::{AppContext, ServerContextSlot};
 
 pub(crate) fn current_app_context() -> Option<Arc<AppContext>> {
     root_runtime_sources::current_app_context()
diff --git a/rustfs/src/storage/storage_api.rs b/rustfs/src/storage/storage_api.rs
index 659ab6fa1..3cd5dd530 100644
--- a/rustfs/src/storage/storage_api.rs
+++ b/rustfs/src/storage/storage_api.rs
@@ -518,6 +518,7 @@ pub(crate) type FileWriter = ecstore_disk::FileWriter;
 pub(crate) type FS = super::ecfs::FS;
 pub(crate) type HashReader = ecstore_rio::HashReader;
 pub(crate) type InstanceContext = ecstore_runtime::InstanceContext;
+pub(crate) type ServerContextSlot = crate::storage::runtime_sources::ServerContextSlot;
 pub(crate) type LocalPeerS3Client = ecstore_rpc::LocalPeerS3Client;
 pub(crate) type MetricType = ecstore_metrics::MetricType;
 pub(crate) type ObjectPartInfo = rustfs_filemeta::ObjectPartInfo;
diff --git a/rustfs/src/storage_api.rs b/rustfs/src/storage_api.rs
index 19bb24bc2..ff6f9eaca 100644
--- a/rustfs/src/storage_api.rs
+++ b/rustfs/src/storage_api.rs
@@ -93,7 +93,7 @@ pub(crate) mod server {
     }
 
     pub(crate) mod http {
-        pub(crate) use crate::storage::storage_api::{TONIC_RPC_PREFIX, verify_rpc_signature};
+        pub(crate) use crate::storage::storage_api::{ServerContextSlot, TONIC_RPC_PREFIX, verify_rpc_signature};
 
         pub(crate) mod ecfs {
             pub(crate) type FS = crate::storage::storage_api::FS;
@@ -215,7 +215,7 @@ pub(crate) mod startup {
     }
 
     pub(crate) mod services {
-        pub(crate) use crate::storage::storage_api::{ECStore, EndpointServerPools};
+        pub(crate) use crate::storage::storage_api::{ECStore, EndpointServerPools, ServerContextSlot};
     }
 
     pub(crate) mod shutdown {