diff --git a/litellm-rust/Cargo.lock b/litellm-rust/Cargo.lock
index 9bffe9f9ec6..3da7d438f50 100644
--- a/litellm-rust/Cargo.lock
+++ b/litellm-rust/Cargo.lock
@@ -670,6 +670,7 @@ name = "litellm-core"
 version = "0.1.0"
 dependencies = [
  "rand 0.8.6",
+ "reqwest",
  "serde",
  "serde_json",
  "thiserror 2.0.18",
diff --git a/litellm-rust/crates/ai-gateway/src/constants.rs b/litellm-rust/crates/ai-gateway/src/constants.rs
index 109b648f5db..dd41b60de42 100644
--- a/litellm-rust/crates/ai-gateway/src/constants.rs
+++ b/litellm-rust/crates/ai-gateway/src/constants.rs
@@ -5,26 +5,6 @@
 //! modules. Env-overridable tunables keep their `DEFAULT_*` value here; the env
 //! read + fallback happens at the host/config layer.
 
-/// Default LiteLLM control-plane base URL for request-log egress when
-/// `LITELLM_PROXY_BASE_URL` is unset.
-pub(crate) const DEFAULT_PROXY_BASE_URL: &str = "http://localhost:4000";
-
-/// The logs ingest path appended to the proxy base. Not a tunable; it is the
-/// proxy's API contract (the rust-control-plane router on the Python proxy).
-pub(crate) const RUST_CONTROL_PLANE_LOGS_PATH: &str = "/v1/rust_control_plane/logs";
-
-/// Default bounded channel depth for the log-egress worker.
-/// Override: `LITELLM_LOG_CHANNEL_CAPACITY`.
-pub(crate) const DEFAULT_CHANNEL_CAPACITY: usize = 4096;
-
-/// Default max records POSTed per request to the control plane.
-/// Override: `LITELLM_LOG_BATCH_SIZE`.
-pub(crate) const DEFAULT_MAX_BATCH_SIZE: usize = 256;
-
-/// Default partial-batch flush cadence, in ms.
-/// Override: `LITELLM_LOG_FLUSH_INTERVAL_MS`.
-pub(crate) const DEFAULT_FLUSH_INTERVAL_MS: u64 = 500;
-
 /// Provider attributed to realtime sessions in the logging payload.
 #[cfg(feature = "server")]
 pub(crate) const DEFAULT_PROVIDER: &str = "openai";
diff --git a/litellm-rust/crates/ai-gateway/src/lib.rs b/litellm-rust/crates/ai-gateway/src/lib.rs
index d8ef7bb5ba1..8ff749f2356 100644
--- a/litellm-rust/crates/ai-gateway/src/lib.rs
+++ b/litellm-rust/crates/ai-gateway/src/lib.rs
@@ -25,11 +25,9 @@ pub mod routes;
 #[cfg(feature = "server")]
 pub mod state;
 
-// Realtime request logging. Only the server serves realtime, so these are
-// `server`-gated; `io::realtime` exposes the generic `observe` hook while the
-// collector and callback fan-out live here.
+// Realtime server collector. Integration traits and callback fan-out live in
+// `litellm-core`; the gateway only wires them into transport/runtime state.
 mod constants;
-pub mod integrations;
 #[cfg(feature = "server")]
 mod realtime;
 
diff --git a/litellm-rust/crates/ai-gateway/src/main.rs b/litellm-rust/crates/ai-gateway/src/main.rs
index f9ce97801d3..29ade7bb707 100644
--- a/litellm-rust/crates/ai-gateway/src/main.rs
+++ b/litellm-rust/crates/ai-gateway/src/main.rs
@@ -16,10 +16,10 @@ use litellm_ai_gateway::routes;
 use litellm_ai_gateway::state::AppState;
 use litellm_core::router::{Deployment, LiteLLMParams, Router};
 
-use litellm_ai_gateway::integrations::custom_logger::CustomLogger;
-use litellm_ai_gateway::integrations::litellm_python_proxy_api::LiteLLMPythonProxyAPILogger;
 #[cfg(feature = "python-config")]
 use litellm_ai_gateway::python;
+use litellm_core::integrations::custom_logger::CustomLogger;
+use litellm_core::integrations::litellm_python_proxy_api::LiteLLMPythonProxyAPILogger;
 
 /// Bind to localhost by default so the gateway is not a public, unauthenticated
 /// provider proxy out of the box. Override with `HOST` (e.g. `0.0.0.0`).
diff --git a/litellm-rust/crates/ai-gateway/src/ocr/hooks.rs b/litellm-rust/crates/ai-gateway/src/ocr/hooks.rs
index 4df26f336d3..5e826b4ff3f 100644
--- a/litellm-rust/crates/ai-gateway/src/ocr/hooks.rs
+++ b/litellm-rust/crates/ai-gateway/src/ocr/hooks.rs
@@ -13,13 +13,13 @@ use super::common_utils::{
     convert_document_url_to_data_uri, has_header, ocr_provider_config, string_headers,
 };
 use super::types::{PreparedOcrRequest, ProviderOcrRequest};
-use crate::integrations::custom_guardrail::{
+use litellm_core::integrations::custom_guardrail::{
     CustomGuardrailRunner, GuardrailContext, GuardrailError, GuardrailRequest,
 };
-use crate::integrations::custom_logger::{
+use litellm_core::integrations::custom_logger::{
     CallType, CallbackTiming, CallbackValue, CustomLoggerRunner, LoggingError, ModelCallDetails,
 };
-use crate::integrations::types::{
+use litellm_core::integrations::types::{
     RequestMetadata, StandardLoggingMetadata, StandardLoggingPayload,
 };
 
diff --git a/litellm-rust/crates/ai-gateway/src/ocr/prepare.rs b/litellm-rust/crates/ai-gateway/src/ocr/prepare.rs
index 6ff55a4520a..d05592e3494 100644
--- a/litellm-rust/crates/ai-gateway/src/ocr/prepare.rs
+++ b/litellm-rust/crates/ai-gateway/src/ocr/prepare.rs
@@ -7,8 +7,8 @@ use serde_json::{json, Value};
 
 use super::hooks::OcrLifecycleHooks;
 use super::types::{OcrRequest, PreparedOcrRequest};
-use crate::integrations::custom_guardrail::CustomGuardrailRunner;
-use crate::integrations::custom_logger::CustomLoggerRunner;
+use litellm_core::integrations::custom_guardrail::CustomGuardrailRunner;
+use litellm_core::integrations::custom_logger::CustomLoggerRunner;
 
 pub(crate) struct PreparedOcrCall {
     pub(crate) request: PreparedOcrRequest,
diff --git a/litellm-rust/crates/ai-gateway/src/ocr/tests.rs b/litellm-rust/crates/ai-gateway/src/ocr/tests.rs
index 299d3bdbcc2..7095d50b74d 100644
--- a/litellm-rust/crates/ai-gateway/src/ocr/tests.rs
+++ b/litellm-rust/crates/ai-gateway/src/ocr/tests.rs
@@ -9,14 +9,14 @@ use tokio::net::{TcpListener, TcpStream};
 
 use super::common_utils::{has_header, ocr_provider_config, string_headers, truncate_error_body};
 use super::{ocr, OcrRequest};
-use crate::integrations::custom_guardrail::{
+use litellm_core::integrations::custom_guardrail::{
     CustomGuardrail, GuardrailContext, GuardrailDecision, GuardrailError, GuardrailEventHook,
     GuardrailFuture, GuardrailRequest,
 };
-use crate::integrations::custom_logger::{
+use litellm_core::integrations::custom_logger::{
     CallbackTiming, CallbackValue, CustomLogger, LogFuture, ModelCallDetails,
 };
-use crate::integrations::types::RequestMetadata;
+use litellm_core::integrations::types::RequestMetadata;
 
 async fn read_http_headers(socket: &mut TcpStream) -> String {
     let mut request = Vec::new();
diff --git a/litellm-rust/crates/ai-gateway/src/ocr/types.rs b/litellm-rust/crates/ai-gateway/src/ocr/types.rs
index bde734a4dd1..f838ee6988c 100644
--- a/litellm-rust/crates/ai-gateway/src/ocr/types.rs
+++ b/litellm-rust/crates/ai-gateway/src/ocr/types.rs
@@ -5,9 +5,9 @@ use litellm_core::call_lifecycle::{CallLifecycleContext, CallLifecycleRequest};
 use litellm_core::ocr::transformation::OcrProviderConfig;
 use serde_json::{Map, Value};
 
-use crate::integrations::custom_guardrail::CustomGuardrail;
-use crate::integrations::custom_logger::CustomLogger;
-use crate::integrations::types::RequestMetadata;
+use litellm_core::integrations::custom_guardrail::CustomGuardrail;
+use litellm_core::integrations::custom_logger::CustomLogger;
+use litellm_core::integrations::types::RequestMetadata;
 
 pub struct OcrRequest<'a> {
     pub model: &'a str,
diff --git a/litellm-rust/crates/ai-gateway/src/realtime/streaming.rs b/litellm-rust/crates/ai-gateway/src/realtime/streaming.rs
index 9ebfa3a7d70..aa6990110a1 100644
--- a/litellm-rust/crates/ai-gateway/src/realtime/streaming.rs
+++ b/litellm-rust/crates/ai-gateway/src/realtime/streaming.rs
@@ -13,10 +13,10 @@ use litellm_core::realtime::types::RealtimeEvent;
 use serde_json::Value;
 
 use crate::constants::DEFAULT_PROVIDER;
-use crate::integrations::custom_logger::{
+use litellm_core::integrations::custom_logger::{
     CallbackTiming, CallbackValue, CustomLogger, CustomLoggerRunner, LoggingError, ModelCallDetails,
 };
-use crate::integrations::types::{
+use litellm_core::integrations::types::{
     RequestMetadata, StandardLoggingMetadata, StandardLoggingPayload, Usage,
 };
 
@@ -233,8 +233,8 @@ impl RealTimeStreaming {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::integrations::custom_logger::LogError;
-    use crate::integrations::custom_logger::LogFuture;
+    use litellm_core::integrations::custom_logger::LogError;
+    use litellm_core::integrations::custom_logger::LogFuture;
     use std::sync::atomic::{AtomicU64, Ordering};
 
     fn event(raw: &str) -> RealtimeEvent {
diff --git a/litellm-rust/crates/ai-gateway/src/routes/realtime/mod.rs b/litellm-rust/crates/ai-gateway/src/routes/realtime/mod.rs
index c3f929f5f0b..d4cf15a2ce1 100644
--- a/litellm-rust/crates/ai-gateway/src/routes/realtime/mod.rs
+++ b/litellm-rust/crates/ai-gateway/src/routes/realtime/mod.rs
@@ -23,10 +23,10 @@ use litellm_core::router::Router as ModelRouter;
 use serde::Deserialize;
 
 use crate::auth::RequireMasterKey;
-use crate::integrations::custom_logger::CustomLogger;
-use crate::integrations::types::RequestMetadata;
 use crate::realtime::streaming::{RealTimeStreaming, SessionStatus};
 use crate::state::AppState;
+use litellm_core::integrations::custom_logger::CustomLogger;
+use litellm_core::integrations::types::RequestMetadata;
 
 /// Process-local monotonic counter, mixed into the per-session call id so two
 /// sessions opened in the same nanosecond still get distinct ids.
diff --git a/litellm-rust/crates/ai-gateway/src/state.rs b/litellm-rust/crates/ai-gateway/src/state.rs
index 3b61d8309ea..34b4534fc74 100644
--- a/litellm-rust/crates/ai-gateway/src/state.rs
+++ b/litellm-rust/crates/ai-gateway/src/state.rs
@@ -3,7 +3,7 @@ use std::sync::Arc;
 use crate::io::realtime_pool::RealtimePool;
 use litellm_core::router::Router;
 
-use crate::integrations::custom_logger::CustomLogger;
+use litellm_core::integrations::custom_logger::CustomLogger;
 
 /// Shared application state handed to every route handler.
 #[derive(Clone)]
diff --git a/litellm-rust/crates/core/Cargo.toml b/litellm-rust/crates/core/Cargo.toml
index 9bd4634cc2a..2e857806390 100644
--- a/litellm-rust/crates/core/Cargo.toml
+++ b/litellm-rust/crates/core/Cargo.toml
@@ -7,9 +7,11 @@ repository.workspace = true
 
 [dependencies]
 rand.workspace = true
+reqwest.workspace = true
 serde.workspace = true
 serde_json.workspace = true
 thiserror.workspace = true
+tokio = { workspace = true, features = ["sync", "time"] }
 
 [dev-dependencies]
 tokio = { workspace = true, features = ["macros", "rt-multi-thread"] }
diff --git a/litellm-rust/crates/ai-gateway/src/integrations/README.md b/litellm-rust/crates/core/src/integrations/README.md
similarity index 95%
rename from litellm-rust/crates/ai-gateway/src/integrations/README.md
rename to litellm-rust/crates/core/src/integrations/README.md
index 16a162dac57..a0c2208b745 100644
--- a/litellm-rust/crates/ai-gateway/src/integrations/README.md
+++ b/litellm-rust/crates/core/src/integrations/README.md
@@ -26,7 +26,7 @@ Implement `CustomLogger` when Rust code needs to observe terminal success or
 failure events. Method names intentionally match Python `CustomLogger` names.
 
 ```rust
-use litellm_ai_gateway::integrations::custom_logger::{
+use litellm_core::integrations::custom_logger::{
     CallbackTiming, CallbackValue, CustomLogger, LogFuture, ModelCallDetails,
 };
 
@@ -80,7 +80,7 @@ during-call checks. Method names intentionally match Python `CustomGuardrail`
 entrypoints inherited from Python `CustomLogger`.
 
 ```rust
-use litellm_ai_gateway::integrations::custom_guardrail::{
+use litellm_core::integrations::custom_guardrail::{
     CustomGuardrail, GuardrailContext, GuardrailDecision, GuardrailEventHook,
     GuardrailFuture, GuardrailRequest,
 };
@@ -104,7 +104,7 @@ impl CustomGuardrail for BlocklistedPromptGuardrail {
         Box::pin(async move {
             if request.data.to_string().contains("blocked phrase") {
                 return Ok(GuardrailDecision::Block(
-                    litellm_ai_gateway::integrations::custom_guardrail::GuardrailError::blocked(
+                    litellm_core::integrations::custom_guardrail::GuardrailError::blocked(
                         "blocked phrase detected",
                     ),
                 ));
diff --git a/litellm-rust/crates/ai-gateway/src/integrations/custom_guardrail/mod.rs b/litellm-rust/crates/core/src/integrations/custom_guardrail/mod.rs
similarity index 100%
rename from litellm-rust/crates/ai-gateway/src/integrations/custom_guardrail/mod.rs
rename to litellm-rust/crates/core/src/integrations/custom_guardrail/mod.rs
diff --git a/litellm-rust/crates/ai-gateway/src/integrations/custom_guardrail/types.rs b/litellm-rust/crates/core/src/integrations/custom_guardrail/types.rs
similarity index 100%
rename from litellm-rust/crates/ai-gateway/src/integrations/custom_guardrail/types.rs
rename to litellm-rust/crates/core/src/integrations/custom_guardrail/types.rs
diff --git a/litellm-rust/crates/ai-gateway/src/integrations/custom_logger/mod.rs b/litellm-rust/crates/core/src/integrations/custom_logger/mod.rs
similarity index 100%
rename from litellm-rust/crates/ai-gateway/src/integrations/custom_logger/mod.rs
rename to litellm-rust/crates/core/src/integrations/custom_logger/mod.rs
diff --git a/litellm-rust/crates/ai-gateway/src/integrations/custom_logger/types.rs b/litellm-rust/crates/core/src/integrations/custom_logger/types.rs
similarity index 100%
rename from litellm-rust/crates/ai-gateway/src/integrations/custom_logger/types.rs
rename to litellm-rust/crates/core/src/integrations/custom_logger/types.rs
diff --git a/litellm-rust/crates/ai-gateway/src/integrations/litellm_python_proxy_api/mod.rs b/litellm-rust/crates/core/src/integrations/litellm_python_proxy_api/mod.rs
similarity index 94%
rename from litellm-rust/crates/ai-gateway/src/integrations/litellm_python_proxy_api/mod.rs
rename to litellm-rust/crates/core/src/integrations/litellm_python_proxy_api/mod.rs
index 3dad18cb7a3..20115f476dd 100644
--- a/litellm-rust/crates/ai-gateway/src/integrations/litellm_python_proxy_api/mod.rs
+++ b/litellm-rust/crates/core/src/integrations/litellm_python_proxy_api/mod.rs
@@ -16,7 +16,6 @@ use reqwest::Client;
 use tokio::sync::mpsc::{self, Receiver, Sender};
 use tokio::time::interval;
 
-use crate::constants::{DEFAULT_PROXY_BASE_URL, RUST_CONTROL_PLANE_LOGS_PATH};
 use crate::integrations::custom_logger::{
     CallbackTiming, CallbackValue, CustomLogger, LogError, LogFuture, LoggingError,
     ModelCallDetails,
@@ -25,6 +24,14 @@ use types::{CallbackLogsRequest, EgressTunables, LogRecord};
 
 pub mod types;
 
+/// Default LiteLLM control-plane base URL for request-log egress when
+/// `LITELLM_PROXY_BASE_URL` is unset.
+const DEFAULT_PROXY_BASE_URL: &str = "http://localhost:4000";
+
+/// The logs ingest path appended to the proxy base. Not a tunable; it is the
+/// proxy's API contract (the rust-control-plane router on the Python proxy).
+const RUST_CONTROL_PLANE_LOGS_PATH: &str = "/v1/rust_control_plane/logs";
+
 /// Ships realtime logging events to the LiteLLM Python proxy.
 pub struct LiteLLMPythonProxyAPILogger {
     sink: Sender<LogRecord>,
diff --git a/litellm-rust/crates/ai-gateway/src/integrations/litellm_python_proxy_api/types.rs b/litellm-rust/crates/core/src/integrations/litellm_python_proxy_api/types.rs
similarity index 79%
rename from litellm-rust/crates/ai-gateway/src/integrations/litellm_python_proxy_api/types.rs
rename to litellm-rust/crates/core/src/integrations/litellm_python_proxy_api/types.rs
index 481a437747f..cd194517046 100644
--- a/litellm-rust/crates/ai-gateway/src/integrations/litellm_python_proxy_api/types.rs
+++ b/litellm-rust/crates/core/src/integrations/litellm_python_proxy_api/types.rs
@@ -2,11 +2,20 @@ use std::time::Duration;
 
 use serde::Serialize;
 
-use crate::constants::{
-    DEFAULT_CHANNEL_CAPACITY, DEFAULT_FLUSH_INTERVAL_MS, DEFAULT_MAX_BATCH_SIZE,
-};
 use crate::integrations::types::StandardLoggingPayload;
 
+/// Default bounded channel depth for the log-egress worker.
+/// Override: `LITELLM_LOG_CHANNEL_CAPACITY`.
+const DEFAULT_CHANNEL_CAPACITY: usize = 4096;
+
+/// Default max records POSTed per request to the control plane.
+/// Override: `LITELLM_LOG_BATCH_SIZE`.
+const DEFAULT_MAX_BATCH_SIZE: usize = 256;
+
+/// Default partial-batch flush cadence, in ms.
+/// Override: `LITELLM_LOG_FLUSH_INTERVAL_MS`.
+const DEFAULT_FLUSH_INTERVAL_MS: u64 = 500;
+
 #[derive(Serialize)]
 pub struct CallbackLogsRequest {
     pub records: Vec<CallbackLogRecord>,
diff --git a/litellm-rust/crates/ai-gateway/src/integrations/mod.rs b/litellm-rust/crates/core/src/integrations/mod.rs
similarity index 100%
rename from litellm-rust/crates/ai-gateway/src/integrations/mod.rs
rename to litellm-rust/crates/core/src/integrations/mod.rs
diff --git a/litellm-rust/crates/ai-gateway/src/integrations/types.rs b/litellm-rust/crates/core/src/integrations/types.rs
similarity index 100%
rename from litellm-rust/crates/ai-gateway/src/integrations/types.rs
rename to litellm-rust/crates/core/src/integrations/types.rs
diff --git a/litellm-rust/crates/core/src/lib.rs b/litellm-rust/crates/core/src/lib.rs
index 555a04ce853..46f29122e5a 100644
--- a/litellm-rust/crates/core/src/lib.rs
+++ b/litellm-rust/crates/core/src/lib.rs
@@ -1,5 +1,6 @@
 pub mod call_lifecycle;
 pub mod error;
+pub mod integrations;
 pub mod ocr;
 pub mod providers;
 pub mod realtime;
diff --git a/litellm-rust/crates/python-bridge/src/integrations_bridge/custom_guardrail_bridge.rs b/litellm-rust/crates/python-bridge/src/integrations_bridge/custom_guardrail_bridge.rs
index 81f251cf933..1864d159d7b 100644
--- a/litellm-rust/crates/python-bridge/src/integrations_bridge/custom_guardrail_bridge.rs
+++ b/litellm-rust/crates/python-bridge/src/integrations_bridge/custom_guardrail_bridge.rs
@@ -1,6 +1,6 @@
 use std::sync::Arc;
 
-use litellm_ai_gateway::integrations::custom_guardrail::{
+use litellm_core::integrations::custom_guardrail::{
     CustomGuardrail, GuardrailContext, GuardrailDecision, GuardrailError, GuardrailEventHook,
     GuardrailFuture, GuardrailRequest,
 };
diff --git a/litellm-rust/crates/python-bridge/src/integrations_bridge/custom_logger_bridge.rs b/litellm-rust/crates/python-bridge/src/integrations_bridge/custom_logger_bridge.rs
index 15956310eda..714c4c802f5 100644
--- a/litellm-rust/crates/python-bridge/src/integrations_bridge/custom_logger_bridge.rs
+++ b/litellm-rust/crates/python-bridge/src/integrations_bridge/custom_logger_bridge.rs
@@ -1,6 +1,6 @@
 use std::sync::Arc;
 
-use litellm_ai_gateway::integrations::custom_logger::{
+use litellm_core::integrations::custom_logger::{
     CallbackTiming, CallbackValue, CustomLogger, LogError, LogFuture, ModelCallDetails,
 };
 use pyo3::prelude::*;