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Friday Seller Tools – Multi-Channel Margin Parity Calculator
x402
Friday Seller Tools – Multi-Channel Margin Parity Calculator 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).
Computes and reconciles product pricing across Amazon, Walmart, Shopify, and eBay to ensure consistent profit margins and competitive parity.
Price / call$0.5
Success—
StatusUnknown
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 result containing per-channel margin percentages, net profit figures after marketplace fees, and pricing recommendations to achieve parity across Amazon, Walmart, Shopify, and eBay.
Example use cases
Cross-marketplace margin audit for existing SKU
“I have a product I sell on Amazon, Walmart, and eBay — it costs me $8 to source and I price it at $24.99 everywhere. Can you run a margin parity check so I can see which platform actually puts more money in my pocket after their fees?”
New product launch pricing strategy
“I'm about to launch a new item on Amazon and Shopify. My landed cost is $15 and I'm thinking $39.99 on Amazon and $42 on Shopify — can you calculate if my margins are balanced across both channels or if I need to adjust?”
Repricing decision after fee change
“Walmart just changed their referral fee structure and I need to know if my current price of $34.99 still gives me a similar margin to what I'm making on eBay at $33.50 — my product cost is $11, can you run a multi-channel margin parity check?”
Technical details
Endpoint
POSThttps://friday-seller-tools-production.up.railway.app/v1/pricing/multi-channel-margin-parityWhen to prefer
Choose this endpoint when a seller needs to simultaneously compare net margins across multiple e-commerce marketplaces (Amazon, Walmart, Shopify, eBay) accounting for their distinct fee structures. It is especially valuable when repricing after a fee change, launching on a new channel, or auditing existing listings for profitability inconsistencies. Prefer it over manual spreadsheet approaches or single-platform margin tools when cross-channel parity is the primary concern.
Side effects
- Missing required pricing or cost inputs returns a validation error
- Invalid or unsupported marketplace channel names may cause processing failures
- Incomplete fee-structure data may result in inaccurate margin calculations
- Async job may time out if the backend queue is overloaded — poll job_id for status
- Network or payment failure at the x402 layer prevents job submission
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| sku | string | |
| channels | array | |
| product_name | string | |
| baseline_channel | string | |
| seller_price_floor | — | |
| product_cost_per_unit | number | |
| minimum_advertised_price | — | |
| price_parity_tolerance_percent | number |
Output
Schema · Response
{
"type": "json",
"example": {
"job_id": "example",
"status": "queued"
}
}Tags
x402
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