← All Friday Seller Tools

Pay once · No Friday subscription

Walmart SEM Post-Ad Contribution Auditor

Find Walmart ad rows where healthy ROAS still hides weak margin.

Walmart US

Included in the $9.00 Shelf Kit

Agent/API — $0.50
Review-first
Every output stays a draft. No credentials
No seller-account login required. Private delivery
Inputs expire after 24 hours. Clear recourse
Digital-service refund policy.

What you receive

  • Post-ad contribution and contribution margin from supplied item economics
  • Calculated ROAS, supplied-reported ROAS variance, conversion, and cost per click
  • Break-even ad spend, break-even ROAS, and remaining spend headroom
  • Campaign, item, and day summaries built only from the submitted batch
  • A stable review queue separating zero-sale spend, losses, thin headroom, and positive rows

Who it is for

Walmart Marketplace sellers, agencies, finance teams, and ad operators auditing a seller-supplied SEM Performance report before a human changes any campaign, budget, bid, ad, item, or listing.

Delivery: usually a structured result, workbook, or ZIP depending on the tool.

How it stays safe

Friday calculates only from the Walmart SEM performance and unit-economics fields you supply. It reads no Walmart account, API, report, campaign, order, customer, or item record and verifies no field. Attributed sales and ROAS do not prove incrementality; post-ad contribution is not net income, a bid recommendation, or a forecast. Friday does not publish listings and never creates, changes, pauses, or publishes a campaign, budget, bid, ad, item, or listing. A human must verify attribution windows, returns, taxes, omitted costs, and the live report.

Synthetic sample

See the deliverable structure before buying

{
  "total_attributed_sales": 520.0,
  "total_spend": 159.0,
  "total_contribution_before_ads": 76.0,
  "total_post_ad_contribution": -83.0,
  "aggregate_roas": 3.27,
  "aggregate_break_even_roas": 6.84,
  "aggregate_post_ad_contribution_margin_percent": -15.96,
  "zero_sales_spend_count": 1,
  "loss_making_count": 1,
  "low_headroom_count": 1,
  "audit_queue_preview": [
    {
      "priority_rank": 1,
      "record_reference": "SEM-ZERO",
      "sku": "NW-TOTE-01",
      "attributed_sales": 0.0,
      "spend": 25.0,
      "post_ad_contribution": -25.0,
      "calculated_roas": null,
      "contribution_status": "zero_sales_spend_review"
    },
    {
      "priority_rank": 2,
      "record_reference": "SEM-LOSS",
      "sku": "NW-MUG-12",
      "attributed_sales": 100.0,
      "spend": 50.0,
      "post_ad_contribution": -65.0,
      "calculated_roas": 2.0,
      "break_even_roas": null,
      "contribution_status": "loss_making_review"
    },
    {
      "priority_rank": 3,
      "record_reference": "SEM-THIN",
      "sku": "NW-BOTTLE-24",
      "attributed_sales": 420.0,
      "spend": 84.0,
      "post_ad_contribution": 7.0,
      "calculated_roas": 5.0,
      "break_even_roas": 4.62,
      "contribution_status": "low_headroom_review"
    }
  ],
  "group_summary_dimensions": [
    "campaign",
    "item",
    "day"
  ],
  "publish_status": "draft_needs_review",
  "safety": "Arithmetic on seller-supplied attribution and costs only. Attributed sales do not prove incrementality; no campaign, budget, bid, ad, item, or listing is changed."
}

This sample uses synthetic facts. Your output is generated only from the facts you submit.

Agent API and x402 details

POST /v1/walmart/sem/post-ad-contribution-audit

Exact x402 price: $0.50. Use the public OpenAPI schema and Base USDC payment flow. The response returns a private job URL and temporary token.

Open the API documentation →

Related seller tools