# ASIN402 FBA Profit Calculator

> ASIN402 FBA Profit Calculator is a paid API for AI agents from asin402.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-31).

Calculates Amazon FBA profitability for a given ASIN and unit cost, returning referral fee, FBA fulfillment fee, net profit, margin, ROI, break-even cost, and max landed cost for 30% ROI using the live buy box price.

## Facts

- Endpoint: GET https://asin402.com/api/fba-profit?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/asin402-fba-profit-calculator-64d38fbf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0_iQPqC4HiAjMcyhPAshr

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 asin402-fba-profit-calculator-64d38fbf
```

Example prompt: I'm thinking about selling Atomic Habits (ASIN B01N5AX61W) on Amazon FBA — I can get it for $5.30 a unit. What's the net profit, ROI, and the maximum I should pay a supplier to still hit 30% ROI on the US marketplace?

## When to prefer this

Use this endpoint when you need fast, per-unit FBA economics for a specific ASIN — especially for online arbitrage, retail arbitrage, or wholesale sourcing decisions. It is ideal when you need the live buy box price automatically, want a supplier negotiation target (max landed cost for 30% ROI), or need break-even analysis. Prefer this over generic Amazon product data APIs when profit and FBA fee calculation is the primary goal.

## Known failure modes

- Invalid or non-existent ASIN returns an error
- ASIN not listed in the specified marketplace returns no data
- No active buy box (no current seller) may result in missing sell price
- Rate limiting or payment failure for the $0.05 per call fee
- Marketplace code not recognized returns validation error

## How this service works

Amazon FBA profit calculator by ASIN. Should I sell this on Amazon FBA? Give an ASIN and your unit cost: returns referral fee, FBA fulfillment fee, net profit, margin, ROI, break-even cost and the maximum landed cost for a 30% ROI (the number to negotiate with suppliers). Uses the live buy box price. For Amazon sellers, wholesale and online arbitrage. Free sample: /api/sample/fba-profit

## Output

A JSON object with the ASIN, product title, marketplace, currency, sell price (live buy box), referral fee and referral fee percentage, FBA fulfillment fee, net profit, margin percentage, ROI percentage, break-even landed cost, maximum landed cost for 30% ROI, whether Amazon itself is the seller, the FBA fee data source, and a timestamp of when the data was fetched. Excludes storage fees, inbound placement fees, returns, and taxes.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "asin"
     ],
     "properties": {
      "asin": {
       "type": "string",
       "description": "Amazon ASIN, 10 characters (books: ISBN-10)"
      },
      "cost": {
       "type": "number",
       "description": "Your unit cost of goods"
      },
      "price": {
       "type": "number",
       "description": "Override the sell price (defaults to current buy box)"
      },
      "domain": {
       "type": "string",
       "description": "Marketplace: us, uk, de, fr, jp, ca, it, es, in, mx, br. Default us"
      },
      "shipping": {
       "type": "number",
       "description": "Inbound shipping per unit"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asin": {
       "type": "string"
      },
      "note": {
       "type": "string"
      },
      "title": {
       "type": "string"
      },
      "roi_pct": {
       "type": "number"
      },
      "currency": {
       "type": "string"
      },
      "data_as_of": {
       "type": "string"
      },
      "margin_pct": {
       "type": "number"
      },
      "net_profit": {
       "type": "number"
      },
      "sell_price": {
       "type": "number"
      },
      "landed_cost": {
       "type": "number"
      },
      "marketplace": {
       "type": "string"
      },
      "referral_fee": {
       "type": "number"
      },
      "fba_fee_source": {
       "type": "string"
      },
      "amazon_is_seller": {
       "type": "boolean"
      },
      "referral_fee_pct": {
       "type": "integer"
      },
      "fba_fulfillment_fee": {
       "type": "number"
      },
      "break_even_landed_cost": {
       "type": "number"
      },
      "max_landed_cost_for_30pct_roi": {
       "type": "number"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "asin": "0735211299",
  "note": "Excludes storage fees, inbound placement fees, returns and taxes.",
  "title": "Atomic Habits: An Easy & Proven Way to Build Good Habits & Break Bad Ones",
  "roi_pct": 204.2,
  "currency": "USD",
  "data_as_of": "2026-10-26T18:40:00.000Z",
  "margin_pct": 43.3,
  "net_profit": 10.82,
  "sell_price": 24.99,
  "landed_cost": 5.3,
  "marketplace": "us",
  "referral_fee": 3.75,
  "fba_fee_source": "marketplace_data",
  "amazon_is_seller": false,
  "referral_fee_pct": 15,
  "fba_fulfillment_fee": 5.12,
  "break_even_landed_cost": 16.12,
  "max_landed_cost_for_30pct_roi": 12.4
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/asin402-fba-profit-calculator-64d38fbf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from asin402.com](https://www.zero.xyz/host/asin402.com/llms.txt)