SSE Servers (MCP)

Server-Sent Events (SSE) is a technology that allows a server to push updates to a client over a single HTTP connection. In the context of the Model Context Protocol (MCP), an SSE server can be used for streaming results or status updates.

SSE in MCP

While the core MCP communication for tool invocation is typically request-response (JSON-RPC over HTTP), SSE can be used for more advanced scenarios:

  • Streaming Output: An MCP server could use SSE to stream the output of a long-running task back to ChatFrame, providing real-time progress updates to the user.
  • Status Updates: SSE could be used to notify ChatFrame of changes in the server's status or the availability of new tools without requiring the client to constantly poll the server.

Advantages

  • Real-time Updates: Provides a low-latency way for the server to send data to the client.
  • Efficiency: More efficient than constant polling for updates.

Configuration in ChatFrame

If an MCP server supports an SSE endpoint, ChatFrame would be configured to listen to this endpoint to receive real-time data streams related to the server's operations.

  1. Model Context Protocol. Specification. https://modelcontextprotocol.io/specification/2025-03-26