Deprecation of SSE Transport in MCP Server – Upgrade to Streamable HTTP
We’ve released MCP Server 1.18.1, which introduces support for Streamable HTTP transport as a replacement for the deprecated SSE transport.
Since the official deprecation of the SSE transport in the Model Context Protocol spec (details here), MCP clients have been moving away from SSE.
To ensure compatibility, MCP Server (as of v1.18.1) supports both Streamable HTTP and SSE transports. We strongly recommend switching to Streamable HTTP wherever possible. The documentation and in-platform links have already been updated to generate configurations using this new transport by default.
What this means for you
- Update client configurations (Claude, Cursor, Windsurf, etc.) to use the new transport:
- ✅ Use:
https://mcp.<YOUR_REGION>.keboola.com/mcp - ❌ Avoid:
https://mcp.<YOUR_REGION>.keboola.com/sse
- ✅ Use:
- SSE will continue to work for some clients in the short term, but we plan to fully decommission it in the future. Some MCP Clients may also drop support sooner.
- Documentation and in-platform links have been updated to generate configurations with Streamable HTTP by default.
We encourage you to update your configurations now to ensure uninterrupted compatibility and long-term stability.