# Streamable HTTP

[5 · Act](/category/act/)

| Streamable HTTP |
| --- |
| Category | [Act](/category/act/) |
| Also known as | MCP Streamable HTTP, HTTP+SSE transport |
| Related | [Model Context Protocol](/protocols/mcp/) |

[Act](/category/act/) Streamable HTTP is the primary remote transport for the Model Context Protocol (MCP), replacing the early dual-endpoint HTTP+SSE transport from the 2024-11-05 specification. Under Streamable HTTP, an MCP server exposes a single HTTP endpoint (commonly /mcp) that accepts JSON-RPC 2.0 POST requests and can respond either with a single application/json body or an upgraded text/event-stream (SSE) stream when streaming notifications or progress. As of the 2026-07-28 MCP release, Streamable HTTP operates statelessly by default using MCP-Protocol-Version, Mcp-Method, and Mcp-Name headers without requiring a sticky session handshake. Used by: mcp.

## Instances

Not applicable.

## See also

- [Model Context Protocol](/protocols/mcp/)

## References

- [https://modelcontextprotocol.io/specification/2026-07-28/index](https://modelcontextprotocol.io/specification/2026-07-28/index) (2026-07-28) VERIFIED
- [https://blog.modelcontextprotocol.io/posts/2026-07-28/](https://blog.modelcontextprotocol.io/posts/2026-07-28/) (2026-07-28) VERIFIED

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