Shop with crypto

Goal

Browse Solana Pay-enabled Shopify stores, add items to a cart, and pay with crypto. The entire flow runs from the CLI — no browser needed.

Commands

List stores

mp commerce store list

Search products

mp commerce product search --store <store> --query <search-term>

Get product details

mp commerce product retrieve --store <store> --productId <product-id>

Add item to cart

mp commerce cart add \
  --store <store> \
  --variantId <variant-id> \
  --quantity <number> \
  --cartId <cart-id>  # omit to create a new cart

View cart

mp commerce cart retrieve --store <store> --cartId <cart-id>

Remove item from cart

mp commerce cart remove --store <store> --cartId <cart-id> --lineId <line-id>

Checkout and pay

mp commerce checkout \
  --wallet <wallet-name> \
  --store <store> \
  --cartId <cart-id> \
  --chain solana \
  --email <buyer-email> \
  --firstName <first> \
  --lastName <last> \
  --address <street-address> \
  --city <city> \
  --postalCode <zip> \
  --country <country-name>

Example flow

1. Browse stores: mp commerce store list
2. Search: mp commerce product search --store ryder.id --query "ryder"
3. Add to cart: mp commerce cart add --store ryder.id --variantId "gid://shopify/ProductVariant/51751218774319" --quantity 1
4. Check cart: mp commerce cart retrieve --store ryder.id --cartId <id-from-step-3>
5. Checkout: mp commerce checkout --wallet main --store ryder.id --cartId <id> --chain solana --email buyer@example.com --firstName John --lastName Doe --address "123 Main St" --city Amsterdam --postalCode 1011 --country Netherlands

How it works

1. Stores expose a Shopify MCP endpoint for browsing and cart management
2. cart add creates or updates a cart (no auth needed, cart ID is the handle)
3. checkout calls the API to start a Helio payment, signs the transaction locally, and submits
4. Helio pays gas — the buyer only pays the item price in USDC
5. Returns a transaction signature and order confirmation URL

Tips

• Run cart add multiple times to add different items — pass the --cartId from the first call
• Use product search to find variant IDs — each variant has a Shopify GID
• The --country flag takes full country names (e.g. "United States", "Netherlands")
• Checkout takes 30-90 seconds — the API automates the Shopify checkout flow
• Currently supports Solana chain only for payment

Related skills

• moonpay-auth — Set up a local wallet for signing
• moonpay-check-wallet — Check USDC balance before checkout
• moonpay-swap-tokens — Swap tokens to get USDC for payment