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fix: Reject null JSON-RPC IDs per MCP spec 2025-11-25

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Monkey-patch JSONRPCNotification to use extra="forbid" so that
requests with "id": null are no longer misclassified as notifications
(202 Accepted). They now correctly fail validation and return a
-32600 Invalid Request error.
This commit is contained in:
saidsurucu
2026-02-16 01:29:17 +03:00
parent 28ff2e39a5
commit d8805cb93b
1 changed files with 14 additions and 0 deletions
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mcp_server_main.py
+14
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@@ -1,4 +1,18 @@
# mcp_server_main.py # mcp_server_main.py
# --- MCP Spec Compliance: Reject null JSON-RPC IDs ---
# The mcp SDK's JSONRPCNotification uses extra="allow", which causes
# {"id": null} to be misclassified as a notification (202 Accepted).
# Per MCP 2025-11-25, null IDs must be rejected with -32600 Invalid Request.
# Changing to extra="forbid" makes validation fail for null IDs,
# returning a proper JSON-RPC error response.
from mcp.types import JSONRPCNotification as _McpJSONRPCNotification, JSONRPCMessage as _McpJSONRPCMessage
from pydantic import ConfigDict as _ConfigDict
_McpJSONRPCNotification.model_config = _ConfigDict(extra="forbid")
_McpJSONRPCNotification.model_rebuild(force=True)
_McpJSONRPCMessage.model_rebuild(force=True)
# --- End MCP Spec Compliance ---
import asyncio import asyncio
import atexit import atexit
import logging import logging