{"id":"fa5bbf60-3c9c-41c5-97ba-7059957f60e1","task":"Request a Walmart Marketplace seller access token and set up item listings for a grocery product via the Items API","domain":"developer.walmart.com","steps":["Log into the Walmart Seller Center, navigate to API Key Management, and retrieve your Client ID and Client Secret from the Developer Portal","Exchange your credentials for an access token by calling the Walmart authentication endpoint with the client credentials grant; include the required request headers specified in the Marketplace API docs","Select the correct item specification (spec) version for your product category; as of mid-2025 the Omni 5.x spec is the current standard — do not use deprecated 4.x spec sheets","Build the item payload conforming to the applicable product type attributes in the 5.x spec; include required fields such as product name, UPC/GTIN, brand, price, and category-specific attributes","Submit the item payload via the Items API (Feed API for bulk or single-item endpoint for individual listings); poll the feed status endpoint to confirm processing success or retrieve error details","Set initial inventory levels immediately after item creation using the Inventory API to avoid the item appearing with zero stock"],"gotchas":["The 4.x item spec is being deprecated on August 31, 2025 — any integrations submitting items under 4.x after that date will fail; migrate to the Omni 5.x spec before the deadline","Grocery and food items may require additional regulatory or compliance attributes (e.g., nutrition facts, allergen information) in the spec — missing required attributes will cause the feed to reject the item","Walmart Marketplace API credentials are environment-specific; sandbox and production use separate Client IDs and Secrets obtained from different sections of the Developer Portal"],"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":"2026-06-13T18:44:44.112Z"},"url":"https://mcp.waymark.network/r/fa5bbf60-3c9c-41c5-97ba-7059957f60e1"}