An internal service exposes only an SSE endpoint for its MCP server, and a colleague says that means Claude Code cannot connect to it. What is the accurate position?

Easyclaude-codemcptransportssse

Last reviewed 21 Aug 2026

SSE is deprecated rather than removed, so the server still connects but is not the preferred path.Correct answer
The service must be rebuilt to expose HTTP before any Claude Code session can reach it.
The colleague is right, because a transport marked deprecated is refused outright by the client at session startup.
SSE is another name for the HTTP transport, so the question of connecting does not arise.

Show answer & explanation

Correct answer: A. SSE is deprecated rather than removed, so the server still connects but is not the preferred path.

Explanation

The principle — Deprecated and unsupported are different states. A deprecated transport still works; it has simply stopped being the one to reach for.

Why the key is correct — The documentation says plainly that the SSE transport is deprecated, and in the same breath explains how to add such a server. Some services still expose only that endpoint, and connecting to one is expected rather than blocked.

Why the others are wrong — Nothing refuses the connection at startup. SSE and HTTP are distinct transports rather than two names for one. And rebuilding the service is a sensible plan, not a requirement before you can use it.

Remember this — Deprecated tells you what to choose next time, not what you may use today.

Sources — Anthropic's Claude Code MCP reference.

Sources

Primary sourceConnect Claude Code to tools via MCP — Anthropic · accessed 20 Aug 2026
“The SSE (Server-Sent Events) transport is deprecated.”

Practise 10 questions on this topic

Take MCP Integration in Claude Code — Timed Test 1 (10 questions) — scored instantly, explanation for every question, no login.

Start the test

An internal service exposes only an SSE endpoint for its MCP server, and a colleague says that means Claude Code cannot connect to it. What is the accurate position?

Related questions

An internal service exposes only an SSE endpoint for its MCP server, and a colleague says that means Claude Code cannot connect to it. What is the accurate position?

Related questions