--- title: "HTTP+SSE transport: definition and example | Agent MCP Directory" description: "HTTP+SSE transport: The older MCP HTTP transport with a separate SSE endpoint, deprecated since 2025-03-26 and reclassified Deprecated." canonical: https://agentmcpdirectory.com/glossary/http-sse-transport site: "Agent MCP Directory" last_updated: 2026-11-04 section: "Glossary" --- # HTTP+SSE transport: definition and example | Agent MCP Directory > HTTP+SSE transport: The older MCP HTTP transport with a separate SSE endpoint, deprecated since 2025-03-26 and reclassified Deprecated. Source: https://agentmcpdirectory.com/glossary/http-sse-transport Site: Agent MCP Directory Last reviewed: 2026-11-04 # HTTP+SSE transport HTTP+SSE transport: The older MCP HTTP transport with a separate SSE endpoint, deprecated since 2025-03-26 and reclassified Deprecated in 2026-07-28. Example: Cloudflare MCP servers return 410 Gone on /sse since 22 Oct 2026. Next in the glossary is MCP Apps: An MCP extension in which a tool points to a ui:// resource the host renders as a sandboxed View. ## Definition The older MCP HTTP transport with a separate SSE endpoint, deprecated since 2025-03-26 and reclassified Deprecated in 2026-07-28. ## Example, with source Cloudflare MCP servers return 410 Gone on /sse since 22 Oct 2026. ([developers.cloudflare.com](https://developers.cloudflare.com/changelog/post/2026-10-22-cloudflare-mcp-servers-retire-sse/), read 4 November 2026) ## Where it appears on this site - [MCP](https://agentmcpdirectory.com/standards/mcp/) - [Building a remote MCP server](https://agentmcpdirectory.com/guides/build-remote-mcp-server-cloudflare-vercel/) ## Neighbouring terms - [Elicitation](https://agentmcpdirectory.com/glossary/elicitation/): A way for a server to ask the user, through the client, for more information, now handled through multi round-trip requests. - [MCP Apps](https://agentmcpdirectory.com/glossary/mcp-apps/): An MCP extension in which a tool points to a ui:// resource the host renders as a sandboxed View. - [MCP client](https://agentmcpdirectory.com/glossary/mcp-client/): The connector inside a host application that holds one connection to one MCP server. Edition 4 November 2026 Method [How rows are verified](https://agentmcpdirectory.com/method/) Data [CSV and JSON](https://agentmcpdirectory.com/data/) Markdown [This page as markdown](https://agentmcpdirectory.com/glossary/http-sse-transport/index.md) ## Sources - [Source for the HTTP+SSE transport example](https://developers.cloudflare.com/changelog/post/2026-10-22-cloudflare-mcp-servers-retire-sse/), read 4 November 2026 Last reviewed 4 November 2026