Amazon FBA Unit Economics & Breakeven ACOS Calculator
Deterministic Amazon FBA unit economics calculator. Pass ?price_usd=29.99&cogs_usd=6.50&weight_oz=12&referral_pct=15. Returns size tier, referral fee, estimated FBA fulfillment + storage fee, net pre-ad contribution ($ and %), breakeven ACOS %, breakeven ROAS, and target ACOS for a 15% net margin.
Offering
- Provider
- x402-niche-briefs.fly.dev
- Method
- GET
- Offering type
- Api Endpoint
- Transport type
- http
- Category
- Other
- Delivery
- Not provided
- Pricing model
- Not provided
- x402 version
- 2
Endpoint context
- URL
https://x402-niche-briefs.fly.dev/v1/fba-fee-margin-calc- MIME type
- application/json
- First seen
- 2026-11-01T15:23:28.507Z
- Last seen
- Tags
- amazon-fba, unit-economics, margin, acos, roas, calculator, ecommerce
Payment pricing
x402 payment terms are the authoritative price for calling this endpoint.
- Payment option 1
- 0.01 USDC
Atomic price: 10000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Raw x402 terms
[
{
"scheme": "exact",
"network": "eip155:8453",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "10000",
"payTo": "0x847f54ae8dDFD71ed7bC930C1f7a73576FAb03A9"
}
]Observed health
- Status
- Healthy
- Latest latency
- 101 ms
- Average latency
- 93 ms
- HTTP status
- 402
- Last checked
- Reachability
- 100% over 2 checks
Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.
Input schema
{
"type": "object",
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"type": "string",
"enum": [
"GET"
]
},
"queryParams": {
"type": "object",
"properties": {
"price_usd": {
"type": "string",
"description": "Retail sale price in USD"
},
"cogs_usd": {
"type": "string",
"description": "Landed cost of goods sold per unit in USD"
},
"weight_oz": {
"type": "string",
"description": "Packaged unit shipping weight in ounces"
},
"referral_pct": {
"type": "string",
"description": "Amazon category referral fee percentage (default 15)"
}
},
"required": [
"price_usd",
"cogs_usd",
"weight_oz"
]
}
},
"required": [
"type",
"method"
],
"additionalProperties": false
}Output schema
{
"type": "object",
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"as_of": {
"type": "string"
},
"inputs": {
"type": "object",
"properties": {
"price_usd": {
"type": "number"
},
"cogs_usd": {
"type": "number"
},
"weight_oz": {
"type": "number"
},
"referral_pct": {
"type": "number"
}
},
"required": [
"price_usd",
"cogs_usd",
"weight_oz",
"referral_pct"
]
},
"estimated_size_tier": {
"type": "string"
},
"fee_breakdown_usd": {
"type": "object",
"properties": {
"referral_fee_usd": {
"type": "number"
},
"fba_fulfillment_fee_usd": {
"type": "number"
},
"est_storage_and_inbound_placement_usd": {
"type": "number"
},
"total_amazon_fees_usd": {
"type": "number"
}
},
"required": [
"referral_fee_usd",
"fba_fulfillment_fee_usd",
"est_storage_and_inbound_placement_usd",
"total_amazon_fees_usd"
]
},
"unit_economics": {
"type": "object",
"properties": {
"net_pre_ad_contribution_usd": {
"type": "number"
},
"net_pre_ad_margin_pct": {
"type": "number"
},
"breakeven_acos_pct": {
"type": "number"
},
"breakeven_roas": {
"type": "number"
},
"target_acos_for_15pct_net_profit": {
"type": "number"
},
"health_verdict": {
"type": "string"
}
},
"required": [
"net_pre_ad_contribution_usd",
"net_pre_ad_margin_pct",
"breakeven_acos_pct",
"breakeven_roas",
"target_acos_for_15pct_net_profit",
"health_verdict"
]
},
"disclaimer": {
"type": "string"
}
},
"required": [
"as_of",
"inputs",
"estimated_size_tier",
"fee_breakdown_usd",
"unit_economics",
"disclaimer"
]
}
},
"required": [
"type"
]
}