SSE Transport Deprecation — Migration to Streamable HTTP
We are announcing the deprecation of Server-Sent Events (SSE) transport for the MCP server, effective April 1, 2026, as we transition to stateless Streamable HTTP for improved scalability and reliability.
Effective April 1, 2026, we are deprecating Server-Sent Events (SSE) transport for the MCP server. All integrations should migrate to Streamable HTTP, our new stateless transport protocol.
Why the change?
Improved Scalability — SSE required maintaining persistent connections to a single server replica, limiting horizontal scaling. Streamable HTTP is fully stateless, enabling multiple server instances behind a load balancer.
Enhanced Reliability — Without dependency on long-lived connections, Streamable HTTP eliminates reconnection issues and provides more predictable behavior under varying network conditions.
Simplified Infrastructure — Moving to a stateless protocol reduces operational complexity and aligns with modern cloud-native architecture patterns.
What you need to do
Update your MCP client configuration to use Streamable HTTP transport at the /mcp endpoint before April 1, 2026. SSE connections will no longer be accepted after this date.
For detailed migration instructions and endpoint configuration, visit our developer documentation.
Need help?
If you have questions or need assistance with the migration, reach out to our support team or your Keboola account manager.