diff --git a/README.md b/README.md
index 6e06e8b..06f5691 100644
--- a/README.md
+++ b/README.md
@@ -25,14 +25,22 @@ Status endpoint, used for *healthcheck*. Shows also current version and commit h
 
 OpenAPI specifications rendered from `GET /openapi.json`.
 
-### `GET /-/origins`
+### `GET /-/origins?leases=false`
 
 List registered origins.
 
-### `GET /-/leases`
+| Query Parameter | Default | Usage                                |
+|-----------------|---------|--------------------------------------|
+| `leases`        | `false` | Include referenced leases per origin |
+
+### `GET /-/leases?origin=false`
 
 List current leases.
 
+| Query Parameter | Default | Usage                               |
+|-----------------|---------|-------------------------------------|
+| `origin`        | `false` | Include referenced origin per lease |
+
 ### `GET /client-token`
 
 Generate client token, (see [installation](#installation)).
diff --git a/app/main.py b/app/main.py
index e92c70c..646feaf 100644
--- a/app/main.py
+++ b/app/main.py
@@ -77,17 +77,28 @@ async def status(request: Request):
 
 
 @app.get('/-/origins')
-async def _origins(request: Request):
+async def _origins(request: Request, leases: bool = False):
     session = sessionmaker(bind=db)()
-    response = list(map(lambda x: jsonable_encoder(x), session.query(Origin).all()))
+    response = []
+    for origin in session.query(Origin).all():
+        x = origin.serialize()
+        if leases:
+            x['leases'] = list(map(lambda _: _.serialize(), Lease.find_by_origin_ref(db, origin.origin_ref)))
+        response.append(x)
     session.close()
     return JSONResponse(response)
 
 
 @app.get('/-/leases')
-async def _leases(request: Request):
+async def _leases(request: Request, origin: bool = False):
     session = sessionmaker(bind=db)()
-    response = list(map(lambda x: jsonable_encoder(x), session.query(Lease).all()))
+    response = []
+    for lease in session.query(Lease).all():
+        x = lease.serialize()
+        if origin:
+            # assume that each lease has a valid origin record
+            x['origin'] = session.query(Origin).filter(Origin.origin_ref == lease.origin_ref).first().serialize()
+        response.append(x)
     session.close()
     return JSONResponse(response)
 
diff --git a/app/orm.py b/app/orm.py
index dc38e37..c451b29 100644
--- a/app/orm.py
+++ b/app/orm.py
@@ -21,6 +21,15 @@ class Origin(Base):
     def __repr__(self):
         return f'Origin(origin_ref={self.origin_ref}, hostname={self.hostname})'
 
+    def serialize(self) -> dict:
+        return {
+            'origin_ref': self.origin_ref,
+            'hostname': self.hostname,
+            'guest_driver_version': self.guest_driver_version,
+            'os_platform': self.os_platform,
+            'os_version': self.os_version,
+        }
+
     @staticmethod
     def create_statement(engine: Engine):
         from sqlalchemy.schema import CreateTable
@@ -59,6 +68,15 @@ class Lease(Base):
     def __repr__(self):
         return f'Lease(origin_ref={self.origin_ref}, lease_ref={self.lease_ref}, expires={self.lease_expires})'
 
+    def serialize(self) -> dict:
+        return {
+            'lease_ref': self.lease_ref,
+            'origin_ref': self.origin_ref,
+            'lease_created': self.lease_created.isoformat(),
+            'lease_expires': self.lease_expires.isoformat(),
+            'lease_updated': self.lease_updated.isoformat(),
+        }
+
     @staticmethod
     def create_statement(engine: Engine):
         from sqlalchemy.schema import CreateTable