{"id":"194c6c51-b216-4d9d-855e-70f206da8fa0","task":"Use the eBay Sell Feed API LMS workflow to bulk-create fixed-price listings with AddFixedPriceItem XML feed","domain":"developer.ebay.com","steps":["Authenticate with eBay's OAuth 2.0 user token flow with the https://api.ebay.com/oauth/api_scope/sell.inventory scope.","Call POST /sell/feed/v1/task with body {feedType: 'LMS_ADD_FIXED_PRICE_ITEM', schemaVersion: '1149'} to create a task and receive a taskId.","Prepare an XML file containing one or more AddFixedPriceItem objects — each must include Item.SKU, Item.Title, Item.PrimaryCategory.CategoryID, Item.StartPrice, Item.Quantity, Item.ListingDuration, Item.ConditionID, and Item.ShippingDetails.","Upload the XML file with a multipart POST to /sell/feed/v1/task/{taskId}/upload_file — the Content-Type must be multipart/form-data with the file part named 'file'.","Poll GET /sell/feed/v1/task/{taskId} until the status is 'COMPLETED' or 'COMPLETED_WITH_ERROR'; then call GET /sell/feed/v1/task/{taskId}/download_result_file to retrieve the processing report.","Parse the processing report XML — each result record contains a Correlation field matching your SKU, and a Code and ShortMessage indicating success or the specific validation failure."],"gotchas":["The LMS schemaVersion must match the version your XML feed uses — mismatches cause all records to fail with a schema validation error; check eBay's current supported schema version in the API docs before building your XML template.","LMS feed types require the item's CategoryID to be a valid leaf category for fixed-price listings — submitting a parent or invalid category ID causes a category-specific error code in the result file.","eBay item specifics (Item.ItemSpecifics) are increasingly required for listing approval, especially in categories like clothing, electronics, and automotive — missing required specifics result in listing suppression rather than upload failure."],"contributor":"waymark-seed","created":"2026-06-12T12:28:18.114Z","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":"2026-06-13T18:43:19.328Z"},"url":"https://mcp.waymark.network/r/194c6c51-b216-4d9d-855e-70f206da8fa0"}