Product
Everything a store needs, plus the person who runs it.
CartKit is a full commerce platform — catalog, checkout, orders, fulfilment — with an operating layer on top that does the repetitive decisions for you.
Northbound Supply
3 agents active · last run 09:12Platform
The commerce half.
Unremarkable on purpose. It should do what you expect, and get out of the way.
Themes that are just files
Server-rendered templates you can edit directly. No proprietary templating dialect, no app store required to change a heading.
Hosted, PCI-scoped, yours
Stripe-backed checkout with your domain and branding. Card, wallet and local methods without a plugin marketplace.
Cost travels with the product
Every variant carries its supplier cost, lead time and facility. That's what makes margin reporting possible downstream.
Cover, not counts
Stock is measured in days of cover at current velocity, so reorder points move with demand instead of sitting at a fixed number.
One record, every cost
Fulfilment, fees, refunds and adjustments attach to the order. The order is the ledger.
Several, ranked
Connect more than one print or dropship partner and route by cost, lead time or region — automatically when one backs up.
The operating half
Rules in sentences, not flowcharts.
An agent in CartKit is a standing instruction plus the authority to act on it. You write what you want held true; it checks continuously and acts when the condition breaks. The log is the interface — you read what happened, not what might.
- Pricing. Hold a margin floor. Reprice on supplier cost moves. Never below cost.
- Inventory. Reorder at a cover threshold, inside a budget, from a preferred supplier.
- Fulfilment. Route by region; switch facility when a backlog passes your limit.
- Spend. Pause ad sets over a CAC target; ask before increasing a budget.
Standing instructions
plain language · versionedHold contribution above $2.00 a unit. Reprice within 24h of a supplier cost change. Never cut below cost. on
Reorder at 14 days of cover. Prefer the supplier with the shorter lead time when cost is within 8%. on
Route EU orders to an EU facility. Switch supplier if the backlog passes 48 hours. on
Pause any ad set whose CAC exceeds target for two days running. Ask before raising a budget. on
Every action is logged, attributed and reversible.
Accountability
Nothing happens off the record.
The failure mode of automation is not a wrong decision — it's a decision nobody can explain a month later. Every action carries the rule that fired it, the figure that triggered it, the timestamp and a one-click reversal.
- Attributed. Which instruction, which version, which input.
- Reversible. Undo restores prior state, including prices and routing.
- Exportable. The whole log leaves as CSV or over the API.
Agent log
16 actions todayMargin engine
Contribution, per variant, continuously.
Revenue minus product cost, shipping, processing fees and refunds — snapshotted at the moment of sale so a later price-list change can't quietly rewrite last month. Costs that settle late restate their original order instead of landing in the current period.
- Multi-currency. Converted at the rate on the day of the order, with the rate recorded.
- Reconciled. Processor fees and refunds pulled back automatically and matched.
- Queryable. By variant, collection, store, channel, supplier or period.
Contribution by variant
Sep 2026 · USD| Variant | Units | Revenue | Cost | Ship | Fees | Contribution |
|---|---|---|---|---|---|---|
| Ridgeline Hoodie — Ash / L RDG-HOD-ASH-L |
148 | $8,732 | $3,552 | $1,184 | $262 | $3,734 |
| Tidewater Mug — 15oz TDW-MUG-15 |
412 | $7,004 | $2,884 | $1,648 | $210 | $2,262 |
| Foldaway Tote — Natural FLD-TOT-NAT |
96 | $2,304 | $1,152 | $480 | $69 | $603 |
| Harbor Cap — Navy HRB-CAP-NVY |
63 | $1,449 | $756 | $315 | $43 | $335 |
| Solstice Poster — 18×24 SOL-PST-1824 |
37 | $703 | $444 | $296 | $21 | −$58 |
| Total | 756 | $20,192 | $8,788 | $3,923 | $605 | $6,876 |
Scale
Four stores shouldn't mean four logins.
Stores share a catalog, a supplier set and a cost history, but keep their own domain, currency, pricing and rules. Margin rolls up across all of them, or drills into one.
Stores
one account · shared catalog| Store | Revenue 30d | Margin | Agents |
|---|---|---|---|
| Northbound Supply northbound.co |
$20,192 | 34.1% | 3 on |
| Tidewater Goods tidewater.store |
$11,460 | 29.7% | 2 on |
| Solstice Print Co solsticeprint.com |
$4,038 | 21.2% | review |
| Harbor & Co harborandco.eu |
$7,915 | 31.5% | 3 on |
Private beta
See it against your own catalog.
Import a CSV and we'll show you the contribution report for products you already sell.