Streamable HTTP
Streamable HTTP is MCP's standard remote transport: a client sends JSON-RPC messages to one HTTP endpoint, and the server replies once or streams several. 719 of the 727 MCP servers linked from Claude listings use Streamable HTTP on October 13, 2026 (99%). 7 use the older SSE transport and 1 don't state a transport.
- Servers using it
- 719
- Share
- 99%
- Replaced
- HTTP with SSE
More from our data
Our wider MCP dataset is the 425 open servers we track across every store, not only the 105 behind ChatGPT and Claude listings, with 7,777 tools. In it, 94% of open servers support MCP protocol version 2025-06-18; 20 answer with an older version and 5 with a later one.