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feat: Allow setting Authorization header from tool arguments #144

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feat: Allow setting Authorization header from tool arguments #144

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e43ab2b
Add support for user_access_token to set Authorization header
stepolan May 20, 2025
fad2301
Log tool call requests in FastApiMCP for better traceability
stepolan May 20, 2025
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9 changes: 9 additions & 0 deletions fastapi_mcp/server.py
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Original file line number Diff line number Diff line change
Expand Up @@ -375,6 +375,8 @@ async def _execute_api_tool(
Returns:
The result as MCP content types
"""
logger.debug(f"FastAPI-MCP: Received call_tool request. Tool: {tool_name}, Arguments: {json.dumps(arguments)}")

if tool_name not in operation_map:
raise Exception(f"Unknown tool: {tool_name}")

Expand Down Expand Up @@ -413,6 +415,13 @@ async def _execute_api_tool(
elif "authorization" in http_request_info.headers:
headers["Authorization"] = http_request_info.headers["authorization"]

# NEW: Check arguments for a user_access_token if Authorization header is still missing
if "Authorization" not in headers and arguments and "user_access_token" in arguments:
token = arguments.pop("user_access_token", None) # Remove it from arguments so it doesn't become body
if token:
headers["Authorization"] = f"Bearer {token}"
logger.debug("Set Authorization header from 'user_access_token' in tool arguments.")

body = arguments if arguments else None

try:
Expand Down