{"id":"9a8b5548-5552-4f4e-9c22-716529f3ed36","task":"Authenticate with the Kroger API using OAuth 2.0 client credentials flow and obtain a scoped access token for product and cart operations","domain":"developer.kroger.com","steps":["Register an application on developer.kroger.com and obtain a client_id and client_secret; note the scopes granted to your app (e.g., product.compact:read, cart.basic:write)","Request a client-credentials token by POSTing to the Kroger authorization server's token endpoint with your encoded client credentials and the desired scope in the request body","Store the returned access_token and its expiry; cache the token and refresh it before expiry rather than requesting a new one on each call","For cart operations that require user context, redirect the user through the OAuth 2.0 authorization code flow; include profile.compact and cart.basic:write in the scope parameter","Exchange the authorization code for a user-scoped token, then include it as a Bearer token in the Authorization header on all subsequent cart API requests","Implement token refresh logic: when a request returns a 401, re-execute the appropriate flow (client credentials or authorization code refresh) and retry once"],"gotchas":["Kroger assigns scopes per registered application during onboarding — you cannot request scopes not pre-approved for your app; verify your granted scopes in the developer portal before building","Cart operations require a user-authorized token (authorization code flow), not a client credentials token — using a client credentials token for cart writes will return an authorization error","The authorization and token endpoints differ between the public sandbox (developer-ce.kroger.com) and production (developer.kroger.com) — ensure you switch base URLs before going live"],"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":"2026-06-13T18:44:19.984Z"},"url":"https://mcp.waymark.network/r/9a8b5548-5552-4f4e-9c22-716529f3ed36"}