diff --git a/src/openjarvis/server/connectors_router.py b/src/openjarvis/server/connectors_router.py
index b75b53c6..58eefd96 100644
--- a/src/openjarvis/server/connectors_router.py
+++ b/src/openjarvis/server/connectors_router.py
@@ -236,6 +236,33 @@ def create_connectors_router():
             "status": "disconnected",
         }
 
+    @router.post("/{connector_id}/sync")
+    def trigger_sync(connector_id: str) -> Dict[str, Any]:
+        """Trigger an incremental sync for a connector."""
+        _ensure_connectors_registered()
+        if not ConnectorRegistry.contains(connector_id):
+            raise HTTPException(
+                status_code=404,
+                detail=f"Connector '{connector_id}' not found",
+            )
+        inst = _get_or_create(connector_id)
+        if not inst.is_connected():
+            raise HTTPException(
+                status_code=400,
+                detail=f"Connector '{connector_id}' is not connected",
+            )
+
+        from openjarvis.connectors.pipeline import IngestionPipeline
+        from openjarvis.connectors.store import KnowledgeStore
+        from openjarvis.connectors.sync_engine import SyncEngine
+
+        store = KnowledgeStore()
+        pipeline = IngestionPipeline(store=store)
+        engine = SyncEngine(pipeline=pipeline)
+        chunks = engine.sync(inst)
+
+        return {"connector_id": connector_id, "chunks_indexed": chunks, "status": "complete"}
+
     @router.get("/{connector_id}/sync")
     async def sync_status(connector_id: str):
         """Return the current sync status for a connector."""
diff --git a/tests/server/test_connectors_router.py b/tests/server/test_connectors_router.py
index 26af63d8..6ff2db3e 100644
--- a/tests/server/test_connectors_router.py
+++ b/tests/server/test_connectors_router.py
@@ -2,6 +2,8 @@
 
 from __future__ import annotations
 
+from pathlib import Path
+
 import pytest
 
 
@@ -78,3 +80,15 @@ def test_sync_status(app):
     data = resp.json()
     assert "state" in data
     assert data["connector_id"] == "obsidian"
+
+
+def test_trigger_sync(app, tmp_path: Path) -> None:
+    """POST /v1/connectors/obsidian/sync triggers an incremental sync."""
+    vault = tmp_path / "vault"
+    vault.mkdir()
+    (vault / "note.md").write_text("# Test note\n\nContent here.")
+    app.post("/v1/connectors/obsidian/connect", json={"path": str(vault)})
+    resp = app.post("/v1/connectors/obsidian/sync")
+    assert resp.status_code == 200
+    data = resp.json()
+    assert data["chunks_indexed"] >= 1