diff --git a/src/api_gateway/db/models/inference_log.py b/src/api_gateway/db/models/inference_log.py
index 55ebd1b7..fa6632ab 100644
--- a/src/api_gateway/db/models/inference_log.py
+++ b/src/api_gateway/db/models/inference_log.py
@@ -16,7 +16,8 @@ class InferenceLog(Base):
     )
     user_id = Column(String, index=True, nullable=False)  # User ID or API key context
     ip_address = Column(String, index=True, nullable=True)  # Client IP supplied by caller/proxy
-    
+    request_id = Column(String, index=True, nullable=True)  # X-Request-ID; null on rows logged before it was stored
+
     # Request Info
     request_payload = Column(JSON, nullable=True)  # Full request body (optional to save space)
     model = Column(String, index=True, nullable=False)
diff --git a/src/api_gateway/gateway/router.py b/src/api_gateway/gateway/router.py
index 80db5249..426a167a 100644
--- a/src/api_gateway/gateway/router.py
+++ b/src/api_gateway/gateway/router.py
@@ -155,6 +155,7 @@ async def _persist_log_background(log_data: InferenceLogCreate, log_id: str):
                 deployment_id=log_data.deployment_id,
                 user_id=log_data.user_id,
                 ip_address=log_data.ip_address,
+                request_id=log_data.request_id,
                 model=log_data.model,
                 request_payload=request_payload,
                 latency_ms=log_data.latency_ms,
diff --git a/src/api_gateway/management/insights.py b/src/api_gateway/management/insights.py
index a5afbf05..7ab0a6ba 100644
--- a/src/api_gateway/management/insights.py
+++ b/src/api_gateway/management/insights.py
@@ -79,6 +79,7 @@ def _build_filters(
     ip_address: str | None,
     status: InsightsStatusFilter,
     deployment_type: InsightsDeploymentTypeFilter,
+    request_id: str | None = None,
 ) -> List[Any]:
     conditions: List[Any] = [
         DBDeployment.org_id == org_id,
@@ -101,6 +102,9 @@ def _build_filters(
     if ip_address:
         conditions.append(DBInferenceLog.ip_address == ip_address)
 
+    if request_id:
+        conditions.append(DBInferenceLog.request_id == request_id)
+
     if status == "success":
         conditions.append(DBInferenceLog.status_code < 400)
     elif status == "error":
@@ -529,6 +533,7 @@ async def get_insights_logs(
     deployment_id: str | None = Query(None),
     model: str | None = Query(None),
     ip_address: str | None = Query(None),
+    request_id: str | None = Query(None, max_length=128),
     status: InsightsStatusFilter = Query("all"),
     deployment_type: InsightsDeploymentTypeFilter = Query("all"),
     limit: int = Query(50, ge=1, le=200),
@@ -553,6 +558,7 @@ async def get_insights_logs(
         ip_address,
         status,
         deployment_type,
+        request_id=request_id,
     )
 
     clamped_limit = min(max(limit, 1), 200)
diff --git a/src/api_gateway/schemas/logging.py b/src/api_gateway/schemas/logging.py
index 9f7bedad..69a43b11 100644
--- a/src/api_gateway/schemas/logging.py
+++ b/src/api_gateway/schemas/logging.py
@@ -9,6 +9,7 @@ class InferenceLogCreate(BaseModel):
     user_id: str
     model: str
     ip_address: Optional[str] = None
+    request_id: Optional[str] = None
     request_payload: Optional[Dict[str, Any]] = None
     latency_ms: Optional[int] = None
     ttft_ms: Optional[int] = None
@@ -30,6 +31,7 @@ class InferenceLogResponse(BaseModel):
     user_id: str
     model: str
     ip_address: Optional[str] = None
+    request_id: Optional[str] = None
     request_payload: Optional[Dict[str, Any]] = None
     latency_ms: Optional[int] = None
     ttft_ms: Optional[int] = None
diff --git a/src/inference/client.py b/src/inference/client.py
index 851a8b07..9c61a386 100644
--- a/src/inference/client.py
+++ b/src/inference/client.py
@@ -221,6 +221,8 @@ async def _send_log():
                     "is_streaming": is_streaming,
                     "applied_policies": applied_policies,
                     "ip_address": ip_address,
+                    # create_task copied the request's context, so this is its id.
+                    "request_id": request_id_ctx.get() or None,
                     "request_type": request_type,
                 }
 
diff --git a/src/infra/schema/global_schema.sql b/src/infra/schema/global_schema.sql
index 392480d7..516fa313 100644
--- a/src/infra/schema/global_schema.sql
+++ b/src/infra/schema/global_schema.sql
@@ -525,7 +525,8 @@ CREATE TABLE inference_logs (
     deployment_id UUID NOT NULL, 
     user_id VARCHAR NOT NULL, 
     ip_address VARCHAR,
-    request_payload JSON, 
+    request_id VARCHAR,
+    request_payload JSON,
     model VARCHAR NOT NULL, 
     latency_ms INTEGER, 
     ttft_ms INTEGER, 
@@ -543,6 +544,7 @@ CREATE TABLE inference_logs (
 );
 CREATE INDEX ix_inference_logs_user_id ON inference_logs (user_id);
 CREATE INDEX ix_inference_logs_ip_address ON inference_logs (ip_address);
+CREATE INDEX ix_inference_logs_request_id ON inference_logs (request_id);
 CREATE INDEX ix_inference_logs_id ON inference_logs (id);
 CREATE INDEX ix_inference_logs_model ON inference_logs (model);
 CREATE INDEX ix_inference_logs_created_at ON inference_logs (created_at);
diff --git a/src/infra/schema/migrations/20261026_inference_logs_request_id.sql b/src/infra/schema/migrations/20261026_inference_logs_request_id.sql
new file mode 100644
index 00000000..b1a02bea
--- /dev/null
+++ b/src/infra/schema/migrations/20261026_inference_logs_request_id.sql
@@ -0,0 +1,14 @@
+-- The inference app gives every request an X-Request-ID (#442). Storing it on
+-- the log row lets a request seen elsewhere, in a client's error or a log
+-- line, be found here. Rows logged before this keep it null.
+--
+-- inference_logs is often the largest table, so the index is built
+-- CONCURRENTLY and does not block inserts. That cannot run inside a
+-- transaction, so the runner executes the part after @SPLIT@ on its own.
+ALTER TABLE inference_logs
+  ADD COLUMN IF NOT EXISTS request_id VARCHAR;
+
+-- @SPLIT@
+
+CREATE INDEX CONCURRENTLY IF NOT EXISTS ix_inference_logs_request_id
+  ON inference_logs (request_id);
diff --git a/src/tests/api_gateway/test_inference_log_background.py b/src/tests/api_gateway/test_inference_log_background.py
index 2679f45a..6fc8a67c 100644
--- a/src/tests/api_gateway/test_inference_log_background.py
+++ b/src/tests/api_gateway/test_inference_log_background.py
@@ -177,3 +177,20 @@ async def test_endpoint_returns_log_id(self):
         assert result["status"] == "ok"
         assert "log_id" in result
         assert len(result["log_id"]) == 36  # UUID length
+
+
+@pytest.mark.asyncio
+async def test_the_request_id_is_stored_on_the_row():
+    from api_gateway.gateway.router import _persist_log_background
+
+    mock_session = AsyncMock()
+    mock_session.__aenter__ = AsyncMock(return_value=mock_session)
+    mock_session.__aexit__ = AsyncMock(return_value=None)
+    added = []
+    mock_session.add = added.append
+
+    with patch("api_gateway.db.database.AsyncSessionLocal", return_value=mock_session):
+        await _persist_log_background(_make_log_data(request_id="trace-42"), "log-rid")
+        await _persist_log_background(_make_log_data(), "log-no-rid")
+
+    assert [row.request_id for row in added] == ["trace-42", None]
diff --git a/src/tests/api_gateway/test_management_insights.py b/src/tests/api_gateway/test_management_insights.py
index 0288b74b..b22ae301 100644
--- a/src/tests/api_gateway/test_management_insights.py
+++ b/src/tests/api_gateway/test_management_insights.py
@@ -284,6 +284,37 @@ async def test_logs_pagination_and_limit_clamping():
     assert len(response.items) == 2
 
 
+@pytest.mark.asyncio
+async def test_logs_can_be_found_by_request_id():
+    request = _make_request()
+    db = AsyncMock()
+    count_result = MagicMock()
+    count_result.scalar.return_value = 1
+    logs_result = MagicMock()
+    logs_result.scalars.return_value.all.return_value = [_make_log("l1")]
+    db.execute.side_effect = [count_result, logs_result]
+
+    await get_insights_logs(
+        request=request,
+        start_time=_now() - timedelta(days=1),
+        end_time=_now(),
+        deployment_id=None,
+        model=None,
+        ip_address=None,
+        request_id="trace-42",
+        status="all",
+        deployment_type="all",
+        limit=50,
+        offset=0,
+        db=db,
+    )
+
+    for call in db.execute.call_args_list:
+        stmt = call.args[0]
+        assert "inference_logs.request_id" in str(stmt)
+        assert "trace-42" in stmt.compile().params.values()
+
+
 @pytest.mark.asyncio
 async def test_empty_dataset_returns_zeroed_shapes():
     request = _make_request()
diff --git a/src/tests/inference/test_request_id.py b/src/tests/inference/test_request_id.py
index aad8ced3..2855cce0 100644
--- a/src/tests/inference/test_request_id.py
+++ b/src/tests/inference/test_request_id.py
@@ -82,3 +82,25 @@ def test_calls_to_the_gateway_forward_the_id():
         assert client._get_headers()["X-Request-ID"] == "trace-7"
     finally:
         request_id_ctx.reset(token)
+
+
+@pytest.mark.asyncio
+async def test_the_log_carries_the_id_of_the_request_being_logged(monkeypatch):
+    import asyncio
+
+    client = ApiGatewayClient()
+    sent = []
+
+    class _Http:
+        async def post(self, path, json, headers):
+            sent.append(json)
+
+    monkeypatch.setattr(client, "_get_client", lambda: _Http())
+    token = request_id_ctx.set("trace-9")
+    try:
+        await client.log_inference(deployment_id="d1", user_id="apikey:k1", model="m")
+    finally:
+        request_id_ctx.reset(token)  # the send runs later, in the context it was created in
+    await asyncio.sleep(0)
+    await asyncio.sleep(0)
+    assert sent[0]["request_id"] == "trace-9"