Shopify Storefront Headless

What it does

When your agent uses it

• Building custom frontends
• Setting up Hydrogen
• Querying products for customer-facing apps
• Managing cart operations programmatically

Example prompts

• “shopify headless”
• “shopify storefront api”
• “shopify hydrogen”
• “/shopify-storefront-headless”

Requirements

• Node.js
• A credential in INVALID_STOREFRONT_ACCESS_TOKEN
• Compatibility (from SKILL.md): Designed for Claude Code
• Pre-approved tools (allowed-tools): Read, Write, Edit, Bash(npm:*), Grep

Workflow steps

4 steps, taken from the step headings in SKILL.md.

1. 1Storefront API Client Setup
2. 2Cart Operations
3. 3Query Products (Storefront Schema)
4. 4Storefront vs Admin API Decision Guide

What it can do on your machine

Read from SKILL.md and the folder at commit cfae287. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves these tools, so the agent can use them without asking each time:

  • Read
  • Write
  • Edit
  • Bash(npm:*)
  • Grep

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  No scripts in the folder and no shell commands in SKILL.md (its code samples are typescript).

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  Links to these hosts (documentation or services it may open):

  • shopify.dev

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names these keys or tokens, usually read from environment variables:

  • INVALID_STOREFRONT_ACCESS_TOKEN

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

• Compatibility

  Designed for Claude Code

  From compatibility in the SKILL.md frontmatter.

Context cost

Shopify Storefront Headless loads about 1.3k tokens when it runs, and up to ~4.3k if it reads all its reference files. Until then it costs about 97 tokens; SKILL.md has 365 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~97

When it runs · the whole SKILL.md, loaded when a task matches

~1.3k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~4.3k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from jeremylongshore/tons-of-skills-marketplace at commit cfae287, republished under its MIT licence (© jeremylongshore). 365 words, ~1,284 tokens.

name

shopify-storefront-headless

description

Build headless storefronts with Shopify's Storefront API and Cart API. Use when building custom frontends, setting up Hydrogen, querying products for customer-facing apps, or managing cart operations programmatically. Trigger with phrases like "shopify headless", "shopify storefront api", "shopify hydrogen", "shopify cart api", "headless commerce shopify".

allowed-tools

Read, Write, Edit, Bash(npm:*), Grep

compatibility

Designed for Claude Code

version

2.7.0

license

MIT

author

Jeremy Longshore <jeremy@intentsolutions.io>

tags

saas, ecommerce, shopify

import { createStorefrontApiClient } from "@shopify/storefront-api-client";

const client = createStorefrontApiClient({
  storeDomain: "my-store.myshopify.com",
  apiVersion: LATEST_API_VERSION,
  publicAccessToken: "your-storefront-public-token", // Safe in browser
});

const { data } = await client.request(CART_CREATE, {
  variables: {
    input: {
      lines: [{ merchandiseId: "gid://shopify/ProductVariant/123", quantity: 2 }],
      buyerIdentity: { email: "customer@example.com", countryCode: "US" },
    },
  },
});
// Redirect to data.cartCreate.cart.checkoutUrl to complete purchase

// Storefront API schema differs from Admin API — field names are NOT the same
const { data } = await client.request(`
  query { products(first: 10) { edges { node {
    id title handle availableForSale
    priceRange { minVariantPrice { amount currencyCode } }
    variants(first: 5) { edges { node {
      id title availableForSale
      price { amount currencyCode }  // MoneyV2 object, not a string
      selectedOptions { name value }
    }}}
  }}}}
`);

© jeremylongshore, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 3 other files (references) in skills/.curated/shopify-storefront-headless of jeremylongshore/tons-of-skills-marketplace.

• SKILL.md
• references/cart-api.md
• references/hydrogen-patterns.md
• references/storefront-vs-admin.md

Open the folder on GitHubat commit cfae287