eval-elisp
Executes an arbitrary Elisp expression in the running Emacs process and returns the printed result. The expression passes through the security layer, which blocks dangerous functions and credential-bearing files (see Security).
How to use it
Project documentation lists eval-elisp for the Emacs MCP Server MCP server. Add the server to your MCP client (Claude Desktop, Cursor, Windsurf and others), then check which tools your installed version makes available. Tool availability can depend on configuration and credentials. A server handshake does not verify this tool’s behavior. See the full listing for setup details.
Install Emacs MCP Server
claude mcp add emacs -- socat - UNIX-CONNECT:$HOME/.config/emacs/.local/cache/emacs-mcp-server.sock # Uses socat directlyOther tools in Emacs MCP Server (14)
Retrieves errors and warnings from flycheck or flymake (auto-detected per buffer) across all project buffers. Results are grouped by file and sorted by severity.
structured agenda and TODO views.
archive a heading to its configured archive target.
create a new entry; template mode respects the user's
clock in, out, or cancel.
fetch a heading or file body.
enumerate existing tags with usage counts so the LLM can
enumerate the user's capture templates so the LLM
move a heading under another.
create a new node, respecting
fetch a node with its backlinks.
find nodes by title, alias, tag, or ref.
heading search using org's match syntax ("+work-home/!TODO" etc.).
update title, TODO state, priority, tags, properties,