clasp is a command-line tool maintained in Google's own GitHub org for local Apps Script development, with an experimental clasp mcp subcommand exposing it over STDIO to coding agents using the CLI's existing credentials. It covers project push/pull, deployments, versions, logs, and API management, but the MCP tool surface is limited and still evolving, OAuth scopes are broad, and push performs a full overwrite of the remote project — credentials and push operations should be handled carefully.
clasp (Command Line Apps Script Projects) is a command-line tool maintained in Google's own GitHub org for developing Google Apps Script projects locally: pushing/pulling code, managing deployments and versions, running script functions remotely, tailing Stackdriver logs, and enabling/disabling Google APIs. Version 3.x adds an experimental clasp mcp mode that runs clasp as a local MCP server over STDIO transport for use by coding agents such as Claude Code and Gemini CLI, reusing the same credentials as the CLI (requires a prior clasp login). The README explicitly states this is 'not an officially supported Google product,' and the MCP mode currently offers only a limited subset of tools.
1) Install globally: npm install -g @google/clasp; 2) Enable the Google Apps Script API at https://script.google.com/home/usersettings; 3) Run clasp login to authorize (the MCP server reuses these saved credentials); 4) Wire it into a coding agent — in Claude Code either run /plugin install @google/clasp, or manually run claude mcp add clasp -- npx -y @google/clasp mcp (or claude mcp add-json clasp "$(cat claude-mcp.json)" using the repo's config file); in Gemini CLI run gemini extensions install https://github.com/google/clasp.
{"mcpServers":{"clasp":{"command":"npx","args":["-y","@google/clasp","mcp"]}}}