Add support for serverside oauth (#255)

Co-authored-by: David Soria Parra <davidsp@anthropic.com>
Co-authored-by: Basil Hosmer <basil@anthropic.com>
Co-authored-by: ihrpr <inna@anthropic.com>

src/mcp/server/auth/json_response.py

@@ -0,0 +1,10 @@
+from typing import Any
+
+from starlette.responses import JSONResponse
+
+
+class PydanticJSONResponse(JSONResponse):
+    # use pydantic json serialization instead of the stock `json.dumps`,
+    # so that we can handle serializing pydantic models like AnyHttpUrl
+    def render(self, content: Any) -> bytes:
+        return content.model_dump_json(exclude_none=True).encode("utf-8")