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Hydrogen 2026-10 is now available

The new Hydrogen is now GA: A framework-agnostic JavaScript library to add Shopify commerce to your existing stack, plus skills for coding agents and starters for React Router and Next.js.
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Surfaces & APIs

Versions

Change type

Latest 2026-10Release candidate 2027-01

  1. October 2026

    Surface
    1. Checkout MCP and Cart MCP now support UCP buyer consent
      UCP

    2. Build with confidence: Shopify AI Toolkit's security check

      Check your app for security vulnerabilities with `shopify app security check`. Run it before you submit an app, and on every release, to catch problems in your own code and get remediation guidance.

      AI Toolkit
    3. Add shopping and Shop Pay checkout to any agent with Shop MCP
      Tools
    4. Cart updates that result in no changes to the cart no longer trigger carts/update webhooks
      Ajax API
    5. Detect when a POS extension screen finishes navigating
      POS Extensions
    6. Identify the published version running in a POS extension
      POS Extensions
    7. Global Catalog REST API stops serving traffic on November 2, 2026
      DeprecatedCatalog
    8. Catalog API now returns compare-at prices as list_price
      Catalog
    9. Hydrogen developer preview update: October 8, 2026
      Hydrogen
    10. New owner_type field for metafield declarations in Checkout and Customer Account UI extensions, required in 2027-01
      Action requiredCheckout UI
    11. Shopify Flow: Flow Trigger Lifecycle Callback extensions now support relative url paths
      Tools
    12. Cart mutations reject unconfirmed writes in POS UI extensions 2026-10
      Breaking changesPOS Extensions
    13. POS UI extensions now return percentage values for percentage discounts
      Breaking changesPOS Extensions
    14. Per-customer request limit for the Customer Account API
      Customer Account API
    15. Downgrade app access scopes from write to read
      GraphQL Admin API
    16. Hydrogen developer preview update: October 2, 2026
      Hydrogen
    17. What's new in Polaris 2.0.0-rc.1
      Polaris

    18. More control over commerce updates with Next Gen Events

      Fewer deliveries, richer payloads, no follow-up queries: Events is a declarative replacement for classic webhooks, now generally available across 18 topics.

      Events & webhooks
    19. New Shop Campaigns metrics and dimensions in ShopifyQL API version 2026-10
      ShopifyQL
    20. Rollouts queries and webhooks in the Admin GraphQL API
      GraphQL Admin API
    21. Discounts can now be included in Rollouts
      Action requiredGraphQL Admin API
    22. Orders webhooks now include selling_plan_id on line items
      Events & webhooks
    23. New fiscalDeviceIdentifier field on PointOfSaleDevice
      GraphQL Admin API
    24. metafieldInteger collection condition removed in API version 2027-01
      Breaking changesGraphQL Admin API
    25. Added parseWarnings to ShopifyqlQueryResponse
      GraphQL Admin API
    26. The orderCancel mutation now returns a structured jobResult
      GraphQL Admin API
    27. SMS marketing consent now available on the CustomerPhoneNumber object
      Action requiredGraphQL Admin API
    28. Tax webhook summary and calculation requests now use Global IDs
      Breaking changesGraphQL Admin API
    29. New SubscriptionContractCalculation API for subscription management
      Action requiredGraphQL Admin API
    30. Inventory shipment webhooks include inventory transfer IDs
      Events & webhooks
    31. Updated function syntax on the segment query language
      Breaking changesGraphQL Admin API
    32. Return policy profiles are now available in the GraphQL Admin API
      GraphQL Admin API
    33. New APIs for buyer-requested order edits
      GraphQL Admin API
    34. New tax fields for return shipping fees in the GraphQL Admin API
      GraphQL Admin API

    35. 2026-10: Release notes

      Covers order tax recalculation, metafield filter errors, and removed checkout fields.

  2. September 2026

    Surface
    1. Use app intents for your discount app
      Functions
    2. More resilient token exchanges when migrating tokens without a user session
      GraphQL Admin API
    3. Manage packed product dimensions with the GraphQL Admin API
      GraphQL Admin API
    4. Move existing subscriptions to Shopify App Pricing
      App store
    5. Sidekick can now invoke app intents without tools
      Platform
    6. WebMCP support for checkout
      Platform
    7. AI Toolkit skills have been consolidated to shopify
      Action requiredAI Toolkit

    8. The new Dev Dashboard: your command center for building

      One home for your apps and the stores you work in: Designed to make your everyday easier.

      Dev Dashboard
    9. Shopify Payments Balance Transaction GraphQL type supports currency conversion type
      GraphQL Admin API
    10. Polaris 2.0 release candidate
      Polaris
    11. Events subscription query complexity limit is changing to 100 points
      Breaking changesEvents & webhooks
    12. Polaris CDN 1.1 is now stable
      Polaris
    13. Removing marketCurrencySettingsUpdate mutation
      Breaking changesGraphQL Admin API
    14. Unlimited private plans and target stores in Shopify App Pricing
      App store
    15. New translatable boolean field for Metafield GraphQL Object
      GraphQL Admin API
    16. The automaticDiscounts query is removed in API version 2027-01
      Breaking changesGraphQL Admin API
    17. Request a bundle size exception for existing UI extensions
      Admin Extensions
    18. Adding a canceled receive action to the inventory shipments API
      GraphQL Admin API
    19. Removed session.currentSession.staffMemberId from POS UI Extensions (2026-10)
      Breaking changesPOS Extensions
    20. Purchase Order Read API
      GraphQL Admin API
    21. Query market hierarchies with the GraphQL Admin API
      GraphQL Admin API
    22. New Pricing audit trail for contextual product variant prices
      GraphQL Admin API
    23. Updates to Events payloads and subscription configuration
      Action requiredEvents & webhooks
    24. Filter Catalog search results by media type
      Catalog
    25. Dynamic complexity cost for metafieldsSet mutation
      GraphQL Admin API
    26. Prepare your app for the Shopify admin's new look
      Polaris
    27. family_name is optional for B2B orders in Payments Apps API requests
      Payments Apps API
    28. Delivery options in Shopify Functions input now expose their metafields
      Functions
    29. Hydrogen developer preview update: September 11, 2026
      Hydrogen
    30. Discounts Allocator Function API developer preview has ended
      Action requiredGraphQL Admin API
    31. Create and delete dev stores in Shopify CLI
      Shopify CLI
    32. Variants now support multiple barcodes
      Action requiredGraphQL Admin API
    33. Customer Address APIs now support countryCode
      DeprecatedCheckout UI
    34. Shopify storefronts now support UCP 2026-08-25
      UCP
    35. Hydrogen developer preview update: September 2, 2026
      Hydrogen
    36. New paymentInstrumentSendAddEmail mutation emails customers a link to add a payment method for a subscription, order, or draft order
      GraphQL Admin API

  3. August 2026

    Surface
    1. Polaris CDN 1.1 release candidate
      Polaris
    2. The Polaris CDN is adopting semantic versioning
      Polaris
    3. More resilient refreshes for expiring offline access tokens
      GraphQL Admin API
    4. Password Protected Shop Dev flows on Shopify Theme CLI v3.83.x and older to be deprecated
      Action requiredThemes
    5. Four additional topics are now available for Events
      Events & webhooks
    6. Build Shopify apps in PHP and Python with new official packages
      Tools
    7. GitHub commits now name the last theme editor
      Themes
    8. Oxygen is now available on trial plan stores
      Hydrogen
    9. Script tags are deprecated and will stop running on March 1, 2027
      Action requiredGraphQL Admin API
    10. App intents on admin.app.intent.link now open as a full-page navigation
      Platform
    11. Hydrogen developer preview update: August 18, 2026
      Hydrogen
    12. Shop Campaigns performance data now available via ShopifyQL
      GraphQL Admin API
    13. Standard storefront events and actions now support cart attributes
      Platform
    14. Draft order and transfer/shipment inventory is moving from reserved to committed
      GraphQL Admin API
    15. WebMCP support for Liquid and Hydrogen storefronts
      Platform
    16. Oxygen is now available on development stores
      Hydrogen
    17. The orderCreate mutation now supports multiple tracking numbers for each fulfillment
      GraphQL Admin API
    18. Updated Built for Shopify requirements for Fulfillment services apps
      Built for Shopify

  4. July 2026

    Surface
    1. Hydrogen developer preview update: July 30, 2026
      Hydrogen
    2. New fields for cash management activities and drawers in POS
      GraphQL Admin API
    3. Merchants now see partner details on collaborator requests
      Dev Dashboard
    4. The shopify-account component for customer accounts is now a Theme Store requirement
      Themes
    5. createdAt is now available on the Customer object in Shopify Functions
      Functions
    6. Updating an order's shipping address recalculates taxes as of API version 2026-10
      Breaking changesGraphQL Admin API
    7. POS UI extensions can now print directly to hardware receipt printers
      POS Extensions
    8. SubscriptionContractCalculation API now available in early access
      GraphQL Admin API
    9. Invalid metafield queries now return errors in the GraphQL Admin API
      Breaking changesGraphQL Admin API

    10. Meet the 2026 Shopify Build Award winners

      Meet the 2026 Shopify Build Award winners across apps, storefronts, merchant impact, and community.

      Partners
    11. Metafield triggers and additional topics are now available for Events
      Events & webhooks