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feat: implement MCP-Protocol-Version header requirement for HTTP transport (#898)

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Felix Weinberger 2025-06-12 18:01:53 +01:00 • committed by GitHub
commit df15e9566d
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1 changed files with 268 additions and 21 deletions
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10
src/mcp/client/auth.py
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@ -17,7 +17,13 @@ from urllib.parse import urlencode, urljoin
import anyio
import httpx
from mcp.shared.auth import OAuthClientInformationFull, OAuthClientMetadata, OAuthMetadata, OAuthToken
from mcp.client.streamable_http import MCP_PROTOCOL_VERSION
from mcp.shared.auth import (
OAuthClientInformationFull,
OAuthClientMetadata,
OAuthMetadata,
OAuthToken,
)
from mcp.types import LATEST_PROTOCOL_VERSION
logger = logging.getLogger(__name__)
@ -121,7 +127,7 @@ class OAuthClientProvider(httpx.Auth):
# Extract base URL per MCP spec
auth_base_url = self._get_authorization_base_url(server_url)
url = urljoin(auth_base_url, "/.well-known/oauth-authorization-server")
headers = {"MCP-Protocol-Version": LATEST_PROTOCOL_VERSION}
headers = {MCP_PROTOCOL_VERSION: LATEST_PROTOCOL_VERSION}
async with httpx.AsyncClient() as client:
try: