# Friday Seller Tools – Walmart Buy Box Margin Gap Plan

> Friday Seller Tools – Walmart Buy Box Margin Gap Plan is a paid API for AI agents from friday-seller-tools-production.up.railway.app, paid per call via x402, $0.5/call, status unknown (last checked 2026-09-15).

Generates an actionable plan to close the margin gap and win the Walmart Buy Box by analyzing pricing, cost, and competitive positioning.

## Facts

- Endpoint: POST https://friday-seller-tools-production.up.railway.app/v1/walmart/buy-box-margin-gap-plan
- Price: $0.5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/friday-seller-tools-walmart-buy-box-margin-gap-plan-e9d013e5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BKw5jOjHBXGENm6p8W3FA

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability friday-seller-tools-walmart-buy-box-margin-gap-plan-e9d013e5 -d '<json body>'
```

Example prompt: Generate a buy box margin gap plan for my Walmart listing — my current selling price is $24.99, my landed cost is $14.50, and the current buy box holder is priced at $21.95. I need to know exactly what pricing and margin adjustments will let me win the buy box profitably.

## When to prefer this

Choose this endpoint when you specifically need a Walmart buy box margin gap analysis — it combines competitive pricing data with your cost basis to produce an actionable repricing plan. Prefer it over generic repricing tools when you need margin-aware recommendations rather than just price matching, and over Amazon or eBay equivalents when your target marketplace is Walmart.

## Known failure modes

- Missing required pricing or cost inputs returns a validation error
- Invalid product identifier or unrecognized Walmart listing data returns a 400 error
- Insufficient margin headroom may return a plan indicating buy box is not achievable at profitable margins
- Payment not received or insufficient USDC balance returns a 402 Payment Required
- Service timeout may result in a queued job that needs status polling

## How this service works

Instant, low-cost Amazon, Walmart, Shopify, and eBay listing, upload-preparation, advertising, and image-brief deliverables.

## Output

Returns a job_id and queued status immediately; the completed deliverable includes a structured buy box margin gap plan with the current gap between your price and the buy box price, margin calculations at various price points, a recommended target price to win the buy box, and an action plan outlining pricing and cost adjustments needed to compete profitably on Walmart.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "records": {
   "type": "array",
   "items": {
    "type": "object",
    "title": "WalmartBuyBoxGapRecord",
    "required": [
     "record_reference",
     "sku",
     "buy_box_status",
     "seller_item_price",
     "product_cost_per_unit",
     "fulfillment_cost_per_unit",
     "percentage_fee_percent",
     "minimum_contribution_per_unit"
    ],
    "properties": {
     "sku": {
      "type": "string",
      "title": "Sku",
      "pattern": "^[A-Za-z0-9][A-Za-z0-9 ._/\\-]{0,119}$"
     },
     "item_id": {
      "anyOf": [
       {
        "type": "string",
        "maxLength": 120,
        "minLength": 1
       },
       {
        "type": "null"
       }
      ],
      "title": "Item Id",
      "default": null
     },
     "item_name": {
      "anyOf": [
       {
        "type": "string",
        "maxLength": 500,
        "minLength": 1
       },
       {
        "type": "null"
       }
      ],
      "title": "Item Name",
      "default": null
     },
     "buy_box_status": {
      "enum": [
       "won",
       "lost",
       "no_buy_box"
      ],
      "type": "string",
      "title": "Buy Box Status"
     },
     "units_sold_30d": {
      "type": "integer",
      "title": "Units Sold 30D",
      "default": 0,
      "maximum": 10000000,
      "minimum": 0
     },
     "record_reference": {
      "type": "string",
      "title": "Record Reference",
      "maxLength": 120,
      "minLength": 1
     },
     "seller_item_price": {
      "type": "number",
      "title": "Seller Item Price",
      "maximum": 1000000,
      "exclusiveMinimum": 0
     },
     "buy_box_item_price": {
      "anyOf": [
       {
        "type": "number",
        "maximum": 1000000,
        "exclusiveMinimum": 0
       },
       {
        "type": "null"
       }
      ],
      "title": "Buy Box Item Price",
      "default": null
     },
     "fixed_fee_per_unit": {
      "type": "number",
      "title": "Fixed Fee Per Unit",
      "default": 0,
      "maximum": 100000,
      "minimum": 0
     },
     "product_cost_per_unit": {
      "type": "number",
      "title": "Product Cost Per Unit",
      "maximum": 1000000,
      "minimum": 0
     },
     "seller_shipping_price": {
      "type": "number",
      "title": "Seller Shipping Price",
      "default": 0,
      "maximum": 1000000,
      "minimum": 0
     },
     "buy_box_shipping_price": {
      "anyOf": [
       {
        "type": "number",
        "maximum": 1000000,
        "minimum": 0

… (truncated)
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "job_id": "example",
  "status": "queued"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/friday-seller-tools-walmart-buy-box-margin-gap-plan-e9d013e5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from friday-seller-tools-production.up.railway.app](https://www.zero.xyz/host/friday-seller-tools-production.up.railway.app/llms.txt)