# Friday Seller Tools – Break-Even What-If Pricing Calculator

> Friday Seller Tools – Break-Even What-If Pricing Calculator is a paid API for AI agents from friday-seller-tools-production.up.railway.app, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-15).

Calculates break-even pricing scenarios and what-if analyses for marketplace sellers on Amazon, Walmart, Shopify, and eBay.

## Facts

- Endpoint: POST https://friday-seller-tools-production.up.railway.app/v1/pricing/break-even-what-if
- Price: $0.25/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-break-even-what-if-pricing-calculator-e9472666
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SF4I3-NukrP7_-bCyd0oL

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-break-even-what-if-pricing-calculator-e9472666 -d '<json body>'
```

Example prompt: My product costs me $8.50 to source, I'm thinking of listing it at $24.99 on Amazon, and I expect to spend about $3 on PPC — can you run a break-even what-if analysis so I can see if that price actually works after fees?

## When to prefer this

Choose this endpoint when a seller needs to model profitability before committing to a listing price, test the impact of changing ad spend, or validate that a product's cost structure is viable on a specific marketplace. It is purpose-built for marketplace sellers (Amazon, Walmart, Shopify, eBay) and accounts for platform-specific fee structures, unlike generic margin calculators.

## Known failure modes

- Missing required cost or price inputs returns a 400 validation error
- Invalid marketplace identifier causes processing failure
- Negative or zero cost values may produce nonsensical results
- Job may remain queued if backend is under load, requiring polling
- Extreme input values (e.g. $0.01 cost, $10,000 price) may return edge-case results

## 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, with the eventual payload containing break-even price points, margin percentages, scenario comparisons, and what-if projections across different price, cost, or ad-spend inputs for the specified marketplace.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "unit_cost": {
   "type": "number",
   "title": "Unit Cost",
   "maximum": 100000,
   "minimum": 0
  },
  "marketplace": {
   "enum": [
    "amazon_us",
    "walmart_us",
    "shopify",
    "ebay_us"
   ],
   "type": "string",
   "title": "Marketplace",
   "default": "amazon_us"
  },
  "product_name": {
   "type": "string",
   "title": "Product Name",
   "maxLength": 200,
   "minLength": 1
  },
  "current_price": {
   "type": "number",
   "title": "Current Price",
   "maximum": 100000,
   "exclusiveMinimum": 0
  },
  "monthly_units": {
   "type": "integer",
   "title": "Monthly Units",
   "maximum": 1000000,
   "minimum": 1
  },
  "candidate_prices": {
   "type": "array",
   "items": {
    "type": "number",
    "maximum": 100000,
    "exclusiveMinimum": 0
   },
   "title": "Candidate Prices",
   "maxItems": 8,
   "minItems": 1
  },
  "fixed_fee_per_unit": {
   "type": "number",
   "title": "Fixed Fee Per Unit",
   "default": 0,
   "maximum": 10000,
   "minimum": 0
  },
  "referral_fee_percent": {
   "type": "number",
   "title": "Referral Fee Percent",
   "default": 15,
   "maximum": 50,
   "minimum": 0
  }
 }
}
```

## 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-break-even-what-if-pricing-calculator-e9472666/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)