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See the document show below
https://gofastmcp.com/servers/context#progress-reporting
And on MCP Server need to use context.report_progress
Method signature:
ctx.report_progress(progress: float, total: float | None = None)
progress: Current progress value (e.g., 24)
total: Optional total value (e.g., 100). If provided, clients may interpret this as a percentage.
Progress reporting requires the client to have sent a progressToken in the initial request. If the client doesn’t support progress reporting, these calls will have no effect.But the document doesn't mention how to do it on mcp client side
See the fastmcp implement it below
async def call_tool(
self,
name: str,
arguments: dict[str, Any] | None = None,
read_timeout_seconds: timedelta | None = None,
) -> types.CallToolResult:
"""Send a tools/call request."""
return await self.send_request(
types.ClientRequest(
types.CallToolRequest(
method="tools/call",
params=types.CallToolRequestParams(name=name, arguments=arguments),
)
),
types.CallToolResult,
request_read_timeout_seconds=read_timeout_seconds,
)And see the mcp type.py has the below implementation
class CallToolRequestParams(RequestParams):
"""Parameters for calling a tool."""
name: str
arguments: dict[str, Any] | None = None
model_config = ConfigDict(extra="allow")
class RequestParams(BaseModel):
class Meta(BaseModel):
progressToken: ProgressToken | None = None
"""
If specified, the caller requests out-of-band progress notifications for
this request (as represented by notifications/progress). The value of this
parameter is an opaque token that will be attached to any subsequent
notifications. The receiver is not obligated to provide these notifications.
"""
model_config = ConfigDict(extra="allow")
meta: Meta | None = Field(alias="_meta", default=None)So I think added in the meta field in arguments should pass the value into it but not working
await client.call_tool("get_forecast",{ "latitude": 47.6101, "longitude": -122.2015, "meta": {"progressToken": "test"} })
Need help on what I miss or what to do to make progress feature work
Thank you
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