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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"context.report_progress not sending notifications on streamable-http","articleBody":"### Initial Checks\n\n- [x] I confirm that I'm using the latest version of MCP Python SDK\n- [x] I confirm that I searched for my issue in https://github.com/modelcontextprotocol/python-sdk/issues before opening this issue\n\n### Description\n\nHello 👋 \n\nIt seems like `context.report_progress` is not sending any notifications on streamable-http.\nI checked and the reason is that `related_request_id` is not specified in the underlying function.\n\nA fix that work on my side in the file `src/mcp/server/fastmcp/server.py`:\n\n```Python\nasync def report_progress(self, progress: float, total: float | None = None, message: str | None = None) -\u003e None:\n\n# \u003c---- non important code is skipped here ---\u003e\n\nawait self.request_context.session.send_progress_notification(\n    progress_token=progress_token,\n    progress=progress,\n    total=total,\n    message=message,\n\n    # ADD this line to fix the issue\n    related_request_id=self.request_id,\n)\n```\n\nI created a PR to add that line.\n\n### Example Code\n\n```Python\nfrom mcp.server.fastmcp import Context, FastMCP\n\nmcp = FastMCP(\"StatelessServer\", stateless_http=True)\n\n@mcp.tool()\nasync def example(ctx: Context) -\u003e str:\n    await ctx.report_progress(0, None, \"This does not work\")\n    await ctx.session.send_progress_notification(\n        ctx.request_context.meta.progressToken, 0, None, \"But this works perfectly\", ctx.request_id\n    )\n    return \"Done\"\n\nmcp.run(transport=\"streamable-http\")\n```\n\n### Python \u0026 MCP Python SDK\n\n```Text\nmcp 1.9.4\nPython 3.13.3\nuv 0.7.13\n```","author":{"url":"https://github.com/abdhx","@type":"Person","name":"abdhx"},"datePublished":"2025-06-13T13:12:14.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":5},"url":"https://github.com/953/python-sdk/issues/953"}