SentryKit pricing — Amazon monitoring from $19/mo, based on your storefronts.

No limits — monitor 50 ASINs or 50,000, at any order volume, for the same price. Your plan is based only on the storefronts you connect, so your bill only changes if you add a storefront. A Q4 or flash-sale spike doesn't throttle your monitoring or change your bill.

A storefront is one Amazon Seller Central account. A single account can sell across many marketplaces (US, UK, Germany, etc.) — those are all included under one storefront at no extra cost. You only use more than one storefront if you run separate Seller Central logins for different regions, brands, or clients.

Almost certainly not. Amazon splits the world into regional accounts (North America, Europe, etc.), so a single global business typically runs 2–3 storefronts. Starter covers 2 and Pro covers 5 — enough for nearly every single-business seller, regardless of how many countries you sell in. You're never charged just for selling across regions.

Yes. If you sell in Europe, alerts can arrive in your own language, and every price in an alert shows in the marketplace's currency — GBP, EUR, CAD, MXN or USD.

No. We tune alerts to what you care about, so you hear about the changes that cost you sales — a lost Buy Box, a hijacker, a suppressed listing, a content or fee change — without being buried in noise.

Storefronts 6–15 are $19 each, and the per-storefront rate drops in volume bands as you grow (16–30: $14, 31–60: $10, 61+: $7) — so the more storefronts you add, the less each one costs. Your exact monthly total is always shown live before you commit. For example, 8 storefronts is $106/mo, 15 is $239/mo.

All 50+ real-time signals are on every plan, including Starter — Buy Box and pricing, fees and margin, account health and policy, listing health and suppression, product content and backend fields, reviews and feedback, rank and visibility, inventory and fulfilment, and competitors and hijackers. Nothing in the signal set is reserved for a higher tier. What Pro adds is competitor seller intelligence and margin control on top of the same signals, not more signal types.

You get 14 days free with full access to every feature and every signal — unlimited ASINs, all marketplaces, no card required. Pick a plan any time before the trial ends; nothing is charged until you do.

Yes — annual billing saves 20%. Starter drops from $19 to $15/mo and Pro's base from $49 to $39/mo, with the same discount applied to any additional storefronts. You can switch between monthly and annual any time in settings.

Included, on every plan. The full REST API and outbound webhooks come with Starter and Pro at no extra cost — there's no API tier, no add-on SKU, and no sales call. Most tools in this category put programmatic access behind an enterprise plan. We don't. Want to test before you pay? The 14-day trial includes full API access and needs no card.