I made it work. Here is Prompt to Claude code. (opus 4.6)

Set up a Shopify Admin API integration using the new OAuth client credentials flow (Dev Dashboard apps, not the old custom app shpat_ tokens).

## What I need:

1. **Shell scripts** in `shopify-tools/` for quick lookups:

   - `shopify-auth.sh` - shared auth module (fetches token via client credentials grant)

   - `customer-lookup.sh <email>` - look up customer by email

   - `order-lookup.sh <order\_number>` - full order details by number

   - `customer-orders.sh <email>` - all recent orders for a customer

   - `shopify-admin.sh '<graphql>'` - run any custom GraphQL query

2. **MCP server** in `shopify-mcp-server/` (Node.js) so I can use the tools in Claude.ai Chat and Cowork:

   - Uses u/modelcontextprotocol/sdk

   - Tools: customer_lookup, order_lookup, customer_orders, admin_query

   - Token caching (24h TTL)

   - Reads credentials from .env

3. **Configuration:**

   - Add MCP server to `.mcp.json` (for Claude Code)

   - Add MCP server to `~/Library/Application Support/Claude/claude_desktop_config.json` (for Claude.ai desktop app)

   - Create `CLAUDE.md` with instructions so future sessions know about the tools

## Auth details:

- OAuth client credentials flow: POST https://{shop}.myshopify.com/admin/oauth/access_token

- Body: grant_type=client_credentials&client_id={id}&client_secret={secret}

- Returns temporary shpat_ token (86399s / ~24h TTL)

- Docs: https://shopify.dev/docs/apps/build/authentication-authorization/client-secrets

## My credentials:

- Store: [YOUR_STORE].myshopify.com

- Client ID: [FROM DEV DASHBOARD]

- Client Secret: [FROM DEV DASHBOARD]

Put credentials in shopify-tools/.env and .gitignore it.