diff --git a/horizon/factdb/client.py b/horizon/factdb/client.py
index 5b40620f..6b9e37c1 100644
--- a/horizon/factdb/client.py
+++ b/horizon/factdb/client.py
@@ -22,6 +22,7 @@
     HttpFetcherConfig,
     HttpMethods,
 )
+from scalar_fastapi import get_scalar_api_reference
 from starlette import status
 from starlette.responses import JSONResponse
 
@@ -51,6 +52,13 @@ def _init_fast_api_app(self) -> FastAPI:
     def _configure_api_routes(self, app: FastAPI):
         """mounts the api routes on the app object."""
 
+        @app.get("/scalar", include_in_schema=False)
+        async def scalar_html():
+            return get_scalar_api_reference(
+                openapi_url="/openapi.json",
+                title="Permit.io PDP API",
+            )
+
         authenticator = JWTAuthenticator(self.verifier)
 
         # Init api routers with required dependencies
diff --git a/requirements.txt b/requirements.txt
index 1f0e2027..23cf1d5b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,6 +10,7 @@ uvicorn[standard]>=0.17.6,<1
 logzio-python-handler
 ddtrace
 sqlparse==0.5.0
+scalar-fastapi==1.0.3
 httpx>=0.27.0,<1
 protobuf>=3.20.2 # not directly required, pinned by Snyk to avoid a vulnerability
 opal-common==0.7.15