Marginal ingests your true costs — COGS, FBA fees, returns — then runs your bids and your prices against one number that actually matters: net margin per ASIN. Wasted spend gets cut. Profitable keywords get fed. Automatically.
Connects via official Amazon Ads API & Selling Partner API · 5-minute setup
Amazon's own automation — and most bid tools — only see revenue. They will happily scale a keyword that loses you money on every sale, because they have no idea what your product costs.
A keyword at 3.5× ROAS looks great — until you subtract COGS and FBA fees and realize you net −$1.12 per order. No ROAS-based tool can catch this. Marginal flags it on day one.
Hundreds of search terms accumulate clicks for months with zero or near-zero conversions. Nobody has time to audit them weekly. Marginal negates them automatically, with a paper trail.
Your repricer drops the price to win the buy box. Your bid tool, unaware, keeps spending like margins didn't just shrink. Marginal runs both levers off one shared profit model.
You approve every change until you trust it. Then you let it fly.
Link your Seller Central and Ads accounts via official Amazon APIs. Upload COGS once (CSV or inline). Marginal pulls fees, returns and orders, and computes true net margin and break-even ACoS for every ASIN — refreshed daily.
Within 48 hours you get a wasted-spend audit: zombie search terms, targets running past break-even, duplicate targets cannibalizing each other, and "profitable" keywords that actually lose money per unit.
Bids move toward per-ASIN profit targets, prices flex within your margin floors — never below them. Daily change limits, full audit log, one-click rollback. Suggest-only → approve → full auto, at your pace.
Every plan starts with a free wasted-spend audit of your account. 14-day free trial, cancel anytime.
▸ The Marginal guarantee: if the audit doesn't find more monthly waste than your plan costs, your first month is free.
Amazon's rule-based bidding optimizes against a ROAS guardrail — it has no idea what your product costs. It can't know a sale is unprofitable. Marginal optimizes against your true net margin, using COGS and fee data Amazon's tools never see.
Those are strong bid platforms — but their engines target ACoS/ROAS goals you set by hand, and none of them manage your prices off the same model. Marginal computes the right target per ASIN from your actual costs, and moves bids and prices together so they never work against each other.
No. Guardrails include daily change limits, minimum-spend floors to protect organic rank, and attribution-lag awareness so it never panics over yesterday's incomplete data. Everything is logged and reversible in one click.
No — most sellers start in suggest-only mode, then graduate to an approve queue, then full auto. You set the pace.
We connect read/write through Amazon's official Ads API and Selling Partner API under their partner policies. Your COGS data is encrypted, never shared, and never used for anything except your own optimization.