Merge pull request #3 from Virtual-Protocol/feat/acp-837

disable endpoint response compression so x402scan can display correctly

Author: koo-virtuals

examples/python/servers/fastapi/main.py

@@ -161,7 +161,9 @@ async def acp_budget(request: Request) -> Dict[str, Any]:
     Handle both GET and POST requests for ACP budget payment.
     x402scan may use either method depending on the request.
     """
-    return {
+    from fastapi.responses import JSONResponse
+    
+    response_data = {
         "message": "pay acp job budget",
         "token": "acp job payment token",
         "protocol": "x402",
@@ -170,6 +172,15 @@ async def acp_budget(request: Request) -> Dict[str, Any]:
         "advice": "not financial advice",
         "method": request.method  # Show which method was used
     }
+    
+    # Explicitly disable compression for x402scan compatibility
+    return JSONResponse(
+        content=response_data,
+        headers={
+            "Content-Encoding": "identity",  # Tell CloudFlare: no compression
+            "Cache-Control": "no-transform",  # Prevent any transformation
+        }
+    )
 
 
 # @app.get("/premium/content")

python/x402/src/x402/fastapi/middleware.py

@@ -146,7 +146,11 @@ def x402_response(error: str):
                     accepts=payment_requirements,
                     error=error,
                 ).model_dump(by_alias=True)
-                headers = {"Content-Type": "application/json"}
+                headers = {
+                    "Content-Type": "application/json",
+                    "Content-Encoding": "identity",  # Disable compression for x402scan
+                    "Cache-Control": "no-transform",  # Prevent any transformation
+                }
 
                 return JSONResponse(
                     content=response_data,
@@ -206,6 +210,9 @@ def x402_response(error: str):
                 response.headers["X-PAYMENT-RESPONSE"] = base64.b64encode(
                     settle_response.model_dump_json(by_alias=True).encode("utf-8")
                 ).decode("utf-8")
+                # Disable compression for x402scan compatibility
+                response.headers["Content-Encoding"] = "identity"
+                response.headers["Cache-Control"] = "no-transform"
             else:
                 return x402_response(
                     "Settle failed: "