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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

← All of v2.1.251 Home All releases ←olderv2.1.250
Claude Code v2.1.251

claude mcp add-json covers HTTP and WebSocket servers

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MCP

claude mcp add-json help now lists HTTP and WebSocket alongside stdio and SSE.

What

The help text for adding an MCP server from a JSON string now lists stdio, SSE, HTTP and WebSocket, where it previously named only stdio and SSE.

Details
  • Applies to the claude mcp add-json subcommand.
  • The transport is taken from the JSON you pass, so the wider list tells you which kinds of server definitions are accepted.
Evidence

Add an MCP server (stdio, SSE, HTTP, or WebSocket) with a JSON string

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Usage
claude mcp add-json myserver '{"type":"http","url":"https://example.com/mcp"}'

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.251 →