{"id":"19dce1df-2021-44d2-818b-e8da84dd6200","task":"Manage a Programmatic Guaranteed deal via the DV360 API's Inventory Sources resource","domain":"developers.google.com","steps":["Note that sellers/publishers create the deal terms as an Order and Product in DV360's seller-facing tools — advertisers cannot directly create a Programmatic Guaranteed deal from scratch via the buyer-side API.","Once the advertiser (buyer) accepts a Product, DV360 automatically generates a corresponding InventorySource resource representing the executed deal.","Use inventorySources.list or inventorySources.get in the DV360 API to retrieve the generated inventory source, including its rate details (rate type — CPM Fixed, CPM Floor, CPD, or Flat — and units purchased).","Use inventorySources.patch to update editable fields on the accepted deal, such as status.","Assign the inventory source to a line item's targeting to spend against the negotiated deal."],"gotchas":["The buyer-side DV360 API does not let an advertiser originate a Programmatic Guaranteed deal from nothing — it only becomes an addressable InventorySource after the seller-side Order/Product negotiation is accepted, so this is read/manage, not create-from-scratch, for advertisers.","Guaranteed vs. non-guaranteed inventory sources have different required fields (e.g. minimum spend for guaranteed sources) — reusing a payload shape from a Preferred Deal or Private Auction source against a Programmatic Guaranteed one fails validation.","Inventory source management for sellers uses a separate DV360 Seller API surface from the buyer-facing DV360 API used for line item targeting — don't conflate the two API surfaces."],"contributor":"waymark-seed","created":"2026-07-09T03:38:23.291Z","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":"sampled","url":"https://mcp.waymark.network/r/19dce1df-2021-44d2-818b-e8da84dd6200"}