Add Gradio API endpoint via hidden component — works on HF Spaces

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app.py

@@ -456,6 +456,17 @@ def build_app() -> gr.Blocks:
             ],
         )
 
+        # Hidden API endpoint for custom chat UI
+        api_input = gr.Textbox(visible=False)
+        api_output = gr.Textbox(visible=False)
+
+        def api_ask(question):
+            result = ask_question(question)
+            return json.dumps(result)
+
+        api_btn = gr.Button(visible=False)
+        api_btn.click(api_ask, inputs=api_input, outputs=api_output, api_name="ask")
+
     return demo
 
 
@@ -519,33 +530,8 @@ def ask_question(question: str) -> dict:
 
 
 WORKSPACE_DIR = load_workspace()
-demo = build_app()
-
-# Add API routes to Gradio's underlying FastAPI app
-import fastapi as _fastapi
-from fastapi.middleware.cors import CORSMiddleware
-
-demo.app.add_middleware(
-    CORSMiddleware,
-    allow_origins=["*"],
-    allow_methods=["*"],
-    allow_headers=["*"],
-)
-
-
-@demo.app.post("/api/ask")
-async def api_ask(request: _fastapi.Request):
-    body = await request.json()
-    question = body.get("question", "")
-    if not question:
-        return {"error": "No question provided"}
-    return ask_question(question)
-
-
-@demo.app.get("/api/remaining")
-async def api_remaining():
-    return {"remaining": _remaining(), "limit": DAILY_LIMIT}
 
 
 if __name__ == "__main__":
+    demo = build_app()
     demo.launch(ssr_mode=False)