# Friday Seller Tools – Deal ROI Calculator

> Friday Seller Tools – Deal ROI 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 return on investment for a product deal or pricing scenario across Amazon, Walmart, Shopify, or eBay marketplaces.

## Facts

- Endpoint: POST https://friday-seller-tools-production.up.railway.app/v1/pricing/deal-roi
- 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-deal-roi-calculator-4768e383
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_lcwlZRQ03aS4hENJwNEHx

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-deal-roi-calculator-4768e383 -d '<json body>'
```

Example prompt: I found a product I can buy for $12 and sell on Amazon for $29.99 — can you calculate the deal ROI for me, factoring in typical Amazon fees, so I know if it's worth buying inventory?

## When to prefer this

Use this endpoint when you need a quick, low-cost ROI and profitability calculation specifically for marketplace resale scenarios on Amazon, Walmart, Shopify, or eBay. Prefer this over generic financial calculators when marketplace-specific fee structures matter for accuracy.

## Known failure modes

- Missing required pricing fields (cost, sell price) returns validation error
- Invalid or unsupported marketplace name causes rejection
- Negative or zero cost/price inputs may return error or nonsensical output
- Service unavailability on Railway hosting may cause timeouts
- Async job queue delays may require polling for results via job_id

## 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, indicating the ROI computation has been accepted. The completed result (once polled or returned) includes calculated ROI percentage, estimated net profit, fee breakdown, and deal viability metrics for the specified marketplace and pricing inputs.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "unit_cost": {
   "type": "number",
   "title": "Unit Cost",
   "maximum": 100000,
   "minimum": 0
  },
  "list_price": {
   "type": "number",
   "title": "List Price",
   "maximum": 100000,
   "exclusiveMinimum": 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
  },
  "baseline_units": {
   "type": "integer",
   "title": "Baseline Units",
   "maximum": 1000000,
   "minimum": 1
  },
  "campaign_spend": {
   "type": "number",
   "title": "Campaign Spend",
   "default": 0,
   "maximum": 1000000,
   "minimum": 0
  },
  "fixed_deal_fee": {
   "type": "number",
   "title": "Fixed Deal Fee",
   "default": 0,
   "maximum": 1000000,
   "minimum": 0
  },
  "discount_percent": {
   "type": "number",
   "title": "Discount Percent",
   "maximum": 90,
   "exclusiveMinimum": 0
  },
  "discounted_units": {
   "type": "integer",
   "title": "Discounted Units",
   "maximum": 1000000,
   "minimum": 1
  },
  "referral_fee_percent": {
   "type": "number",
   "title": "Referral Fee Percent",
   "default": 15,
   "maximum": 50,
   "minimum": 0
  },
  "comparable_period_label": {
   "type": "string",
   "title": "Comparable Period Label",
   "maxLength": 80,
   "minLength": 2
  },
  "fee_per_discounted_unit": {
   "type": "number",
   "title": "Fee Per Discounted Unit",
   "default": 0,
   "maximum": 10000,
   "minimum": 0
  },
  "fulfillment_cost_per_unit": {
   "type": "number",
   "title": "Fulfillment Cost Per Unit",
   "default": 0,
   "maximum": 10000,
   "minimum": 0
  },
  "other_variable_cost_per_unit": {
   "type": "number",
   "title": "Other Variable Cost Per Unit",
   "default": 0,
   "maximum": 10000,
   "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-deal-roi-calculator-4768e383/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)