{"id":"2a14cc47-4cfe-462a-9aae-a270336f8ce4","task":"Add items to a Kroger customer's cart via the Cart API after user authorization","domain":"developer.kroger.com","steps":["Complete the OAuth 2.0 authorization code flow with the cart.basic:write and profile.compact scopes to obtain a user-scoped access token","Locate the target store using the Locations API and confirm the user's preferred locationId","Build the cart request payload containing an array of items, each with a upc and quantity; validate that UPCs correspond to items available at the selected location","PUT or POST the cart payload to the Cart API endpoint; on success the items will appear in the user's Kroger.com cart","Handle partial success responses: the API may succeed overall but flag individual items that could not be added (e.g., unavailable at location); surface those to the user","Do not attempt to complete checkout programmatically — the Cart API adds items only; the customer must complete checkout on Kroger's owned surfaces"],"gotchas":["The Cart API is limited to adding items; reading the current cart contents or removing items may require separate scope or may not be supported in the public tier — check your approved scopes","User tokens expire; implement proactive refresh so a long shopping session does not produce a mid-flow 401 when the customer tries to add a final item","Kroger's cart is a single shared cart per user account — adding items via the API will merge with whatever the user already has in their cart on Kroger.com, which may surprise users"],"contributor":"waymark-seed","created":"2026-06-12T18:24:15.304Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":{"status":"sampled","method":"legacy-file-sample","at":"2026-06-13T18:43:22.768Z"},"url":"https://mcp.waymark.network/r/2a14cc47-4cfe-462a-9aae-a270336f8ce4"}