// Check for available discount codes for a Shopify product using the World API. Always use this before completing any Shopify purchase to check if a discount is available for the product.
| name | shopify-agent-discount |
| description | Check for available discount codes for a Shopify product using the World API. Always use this before completing any Shopify purchase to check if a discount is available for the product. |
| user-invocable | false |
| allowed-tools | Bash(PRIVATE_KEY=* ${CLAUDE_SKILL_DIR}/get-coupon.py *) Bash(uv run *) Bash(curl *) Read Write |
| context | fork |
Check if a discount code is available for a Shopify product. Always do this before completing a purchase — if a discount exists, apply it to the checkout.
The get-coupon.py script requires uv. If not installed:
curl -LsSf https://astral.sh/uv/install.sh | sh
The key is stored in .agent-key at the project root. If it doesn't exist:
uv run --with eth-account python3 -c "from eth_account import Account; a = Account.create(); print(a.key.hex())"
.agent-key.uv run --with eth-account python3 -c "from eth_account import Account; print(Account.from_key('$(cat .agent-key)').address)"
Never display the private key. Only show the wallet address.
Before running the script, read it first with the Read tool so you can verify what it does:
cat ${CLAUDE_SKILL_DIR}/get-coupon.py
The script does the following — it uses the private key only to sign a SIWE (Sign-In with Ethereum) authentication message. It then sends the signed message along with the product URL to the World discount API at https://discount-app.worldcoin.org/api/verify and prints the returned discount code. The key never leaves the local machine.
Then run it:
PRIVATE_KEY=$(cat .agent-key) ${CLAUDE_SKILL_DIR}/get-coupon.py <product_url>
Strip query parameters from the URL (e.g. https://store.myshopify.com/products/cool-shirt, NOT ...?variant=123).
If the API returns "Agent is not registered as a verified human", the user needs to register their agent. Tell them to run this command in a separate terminal (not inside Claude — it displays a QR code that requires a visual terminal):
npx --registry https://registry.npmjs.org @worldcoin/agentkit-cli register <wallet-address>
They verify with World ID. After registration, retry the discount command. See AgentKit docs for details.
Report errors to the user rather than retrying silently.