Storefront MCP and UCP Cart MCP
Agentic storefront integrations using Storefront MCP cart tools
- Action
- Move get_cart and update_cart to the UCP endpoint; add required meta fields; use full-state PUT semantics for update_cart
- Effective
- Aug 31, 2026
Shopify API deprecation tracker.
Find the Shopify deprecations that can affect apps, checkout extensions, Admin GraphQL integrations, Storefront APIs, webhooks, Functions, and developer tools. Every entry stays tied to an official source.
01 / OPEN DEPRECATIONS
Verified deprecation records
3 current records are classified as deprecations. Unknown deadlines remain unknown rather than being estimated as fact.
Checkout UI and Polaris
Checkout UI extensions using useBuyerJourneyIntercept
- Action
- Migrate enforceable rules to cart and checkout validation Functions; move discount rejection logic to the Discount Function API
- Effective
- Not published
Admin GraphQL API
Apps using cumulative marketing engagement metrics
- Action
- Stop depending on isCumulative=true and plan non-cumulative engagement reporting
- Effective
- Not published
How to respond to a Shopify API deprecation
- Confirm applicability.
Search the app's API surfaces, extension types, webhooks, and current API version for the deprecated capability.
- Separate announcement date from removal date.
A deprecation can be published without a fixed shutdown date. Do not invent a deadline when Shopify has not stated one.
- Identify the replacement path.
Record the new field, endpoint, Function, extension API, or version before estimating implementation work.
- Test the migration boundary.
Cover request and response changes, webhook payloads, permissions, concurrency, and merchant-visible behavior relevant to the app.
- Keep the evidence attached.
Link the official Shopify source from the backlog item and client report so later corrections remain auditable.