Shopify API Skill Skill

Shopify API Skill

This skill allows you to effectively interact with Shopify's ecosystem through its various APIs.

API Selection Guide

Choose the right API for your task:

Admin GraphQL API (Preferred): Use for most backend operations. It's the primary API for Shopify, offering more features and efficiency than REST.
Admin REST API: Use for simple resource management if GraphQL is too complex for the specific task or if dealing with legacy systems.
Storefront API: Use for building custom shopping experiences (headless commerce). It is unauthenticated or uses public access tokens.

Authentication

Admin API (Custom Apps)

Most internal apps use a custom app access token.

Header: X-Shopify-Access-Token: <shpat_...>
URL: https://{shop}.myshopify.com/admin/api/{version}/{endpoint}

OAuth (Public Apps)

For apps distributed on the App Store.

Header: X-Shopify-Access-Token: <access_token>
Flow: Requires an OAuth exchange to get the offline/online token.

1. Admin GraphQL API

Endpoint

POST https://{shop}.myshopify.com/admin/api/{version}/graphql.json

Common Patterns

Querying Products

query getProducts($first: Int!) {
  products(first: $first) {
    edges {
      node {
        id
        title
        handle
      }
      cursor
    }
    pageInfo {
      hasNextPage
    }
  }
}

Mutation (Update Product)

mutation productUpdate($input: ProductInput!) {
  productUpdate(input: $input) {
    product {
      id
      title
    }
    userErrors {
      field
      message
    }
  }
}

Pagination

GraphQL uses cursor-based pagination. Always request pageInfo { hasNextPage } and the cursor of the last edge to fetch the next page using the after argument.

2. Admin REST API

Endpoint

https://{shop}.myshopify.com/admin/api/{version}/{resource}.json

Pagination

REST API uses link headers for pagination. Do not use page parameter for most resources; use page_info.

Example Request: GET /admin/api/2025-10/products.json?limit=50

Response Header: Link: <...page_info=...>; rel="next", <...>; rel="previous"

3. Storefront API

Endpoint

POST https://{shop}.myshopify.com/api/{version}/graphql.json

Authentication

Header: X-Shopify-Storefront-Access-Token: <public_token>

Example Query

query {
  shop {
    name
  }
  products(first: 5) {
    edges {
      node {
        title
        priceRange {
          minVariantPrice {
            amount
            currencyCode
          }
        }
      }
    }
  }
}

Rate Limits

Shopify APIs use a leaky bucket algorithm.

REST: 40 requests/bucket, refilled at 2/sec (Standard).
GraphQL: Cost-based. 1000 cost points/bucket, refill rate varies (50/sec standard).

Handling: Check X-Shopify-Shop-Api-Call-Limit header (REST) or extensions.cost (GraphQL). Implement exponential backoff for 429 Too Many Requests.

Agent Skills: Shopify API Skill

Install this agent skill to your local

Skill Files