mechanic-mcp

Mechanic MCP server for the task library and docs. Built for writing and customizing Mechanic tasks (Shopify automation app: https://apps.shopify.com/mechanic). Offline by default (bundled data), serving public URLs for tasks (https://tasks.mechanic.dev) and docs (https://learn.mechanic.dev).

User guide

• Requirements: Node.js 18+, MCP-capable client (Cursor, Claude Desktop, Codex, Gemini CLI, etc.).

• What you can ask: find tasks; fetch task code (subscriptions + script/JS blocks); find docs; suggest similar tasks; get doc content; help writing or customizing Mechanic tasks.

• Setup (use npx @lightward/mechanic-mcp@latest):

  • Cursor:

    {
      "mcpServers": {
        "mechanic-mcp": {
          "command": "npx",
          "args": ["-y", "@lightward/mechanic-mcp@latest"]
        }
      }
    }

  • Claude Desktop:

    {
      "mcpServers": {
        "mechanic-mcp": {
          "command": "npx",
          "args": ["-y", "@lightward/mechanic-mcp@latest"]
        }
      }
    }

  • Codex (~/.codex/config.toml):

    [mcp_servers.mechanic-mcp]
    command = "npx"
    args = ["-y", "@lightward/mechanic-mcp@latest"]

  • Gemini CLI: same JSON as Cursor/Claude.

• Tools:

  • search_tasks: returns public URL, tags, subscriptions/subscriptions_template, options.

  • search_docs: returns public URL/sourceUrl.

  • get_task (tasks only): script + subscriptions + options + JS blocks; not full JSON.

  • get_doc (docs only): full markdown.

  • similar_tasks: related tasks by tags/subscriptions/title.

  • refresh_index: rebuild (not needed for packaged data).

• Usage notes: cite public URLs (no local paths/.md); prefer GraphQL in code; when sharing code, return subscriptions + script/JS (relevant bits), not full JSON.

Related MCP server: Shopify Liquid MCP Server

For maintainers

• Bundled data: dist/data/index.json.gz, records.json.gz, manifest.json (users don’t need source repos).

• Regenerate (if needed):

  MECHANIC_DOCS_PATH=/path/to/mechanic-docs MECHANIC_TASKS_PATH=/path/to/mechanic-tasks npm run build:data
  npm run build

• Tests: npm run test:smoke, npm run test:smoke-doc, npm run test:smoke-task.

• Publish: bump version, npm publish (use --access public for scoped packages).

Env (optional)

• MECHANIC_DATA_PATH (default dist/data), MECHANIC_DOCS_PATH, MECHANIC_TASKS_PATH, repo URLs/branches, sync interval.

Runtime

• Loads bundled index/records from MECHANIC_DATA_PATH; refresh_index rebuilds if you opt in. Stdio transport; TF-IDF search with fuzzy + pagination; no network calls for search/resources.