Amazon FBA fee & net payout API

Compute Amazon FBA fees (referralFee = max(salePrice × referralRate, minReferral) + flat FBA fulfillment fee) and net payout, with optional profit/margin and a rating; defaults to 15% referral / $0.30 minimum. Deterministic fee stacking. Answers 'what are my Amazon FBA fees','net payout after referral and fulfillment fees','am I profitable on Amazon'.

Price$0.01per request

MethodPOST

Route/v1/calc/ecom-amazon-fba-fee

StatusLive

MIME typeapplication/json

Rate limit120/minute

CacheNo cache

ecomamazonfbafeesreferralfulfillmentmarketplacecalc

API URLhttps://x402.hexl.dev/v1/calc/ecom-amazon-fba-fee

Integration docs

Example request

{
  "salePrice": 30,
  "referralRate": 0.15,
  "fulfillmentFee": 4.5,
  "unitCost": 10
}

Example response

{
  "formula": "referralFee = max(salePrice × referralRate, minReferral); totalFees = referralFee + fulfillmentFee; net = salePrice − totalFees",
  "salePrice": 30,
  "referralRate": 0.15,
  "minReferral": 0.3,
  "fulfillmentFee": 4.5,
  "referralFee": 4.5,
  "totalFees": 9,
  "feePercent": 30,
  "netPayout": 21,
  "unitCost": 10,
  "profitPerUnit": 11,
  "marginPercent": 36.67,
  "rating": "healthy"
}

Input schema

{
  "type": "object",
  "required": [
    "salePrice"
  ],
  "properties": {
    "salePrice": {
      "type": "number",
      "examples": [
        30
      ]
    },
    "referralRate": {
      "type": "number",
      "description": "Decimal 0-1, default 0.15",
      "examples": [
        0.15
      ]
    },
    "fulfillmentFee": {
      "type": "number",
      "description": "Flat FBA fee per unit",
      "examples": [
        4.5
      ]
    },
    "minReferral": {
      "type": "number",
      "description": "Default 0.30",
      "examples": [
        0.3
      ]
    },
    "unitCost": {
      "type": "number",
      "examples": [
        10
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}