A small on-device instrument that watches every public source a serious buyer cares about — designer storefronts, sample sales, archive auctions, restocks of sold-out grails — and pushes a notification the moment a piece matches your taste. Tap once. The retailer's app, already signed in. The piece, before the world finds out.
— Free, non-binding · founders'-run pricing held for waitlist
FastBox is a fanless aluminium instrument that lives next to your router. Eight cores, eight gigabytes, an SSD, and a single dedicated job: watch every public surface a serious buyer reads, and tell you the moment a piece you'd want is live.
Five watts at idle. Silent. Always on. Designed to do one thing well — for the next decade — without ever asking for your attention.
The median sellout for a hyped Sacai capsule on SSENSE — the kind of figure once reserved for streetwear drops, now governing serious designer collaborations. The IG announcement reaches you four minutes after the size you wanted is gone. The brand newsletter the next morning. FastBox watches the storefront itself, in seconds.
Source · internal sellout study, 24 collaborative capsules across SSENSE / END. / Slam Jam, 2024–2025
The brand newsletter is twelve hours late. The IG following is a firehose of seven hundred posts a day. The sneaker bot will get your account banned. The buyer is left to refresh, alone.
Aimé Leon Dore, Stüssy, Carhartt WIP — the brands you actually wear send a Tuesday morning email about Tuesday morning's drop. The size you wanted was gone by Tuesday morning. The newsletter is documentation, not access.
You follow seven hundred accounts to keep up. The feed reorders by engagement, not chronology. The ALD restock you waited for ran past you while you double-tapped a Junya runway look. The algorithm is not on your side.
Paid sneaker bots cost $60 to $1,800 a year, run residential proxies, and exist to defeat the per-customer limits brands enforce on collabs. They get accounts banned and ruin restocks for everyone. That is not the buyer you are.
FastBox is a small, fanless aluminium box that lives next to your router. It watches hundreds of public surfaces — designer storefronts, multi-brand retailers, sample-sale calendars, JP and EU archive marketplaces, brand IG announcements, and the small newsletters that the right people still read — at the cadence each one actually changes.
When a piece matches what you've described, your phone vibrates. The notification names the piece, names the size, names the price, and deep-links into the retailer's official app, where you are already signed in. You decide in seconds. You complete the purchase as a normal logged-in human. The piece is yours before the queue forms.
Under two seconds from the storefront's first byte to your lock screen — earlier than the brand's own Instagram post. Tap once. Open the retailer's app. The size you wanted, still in stock.
The poll fires, the storefront diff catches the change, the model scores the match against your taste, and the push lands. Median end-to-end latency: 1.8 seconds on hot storefronts — earlier than the brand's own IG announcement.
The notification names the piece, names the size, names the retailer, and tells you what's in stock right now. Tap once and the official app opens, already signed in. No second screen, no checkout-bot rituals. You buy as yourself.
Standard alerts honour your "do not disturb" window. Critical alerts — items you flag urgent (sample sales, archive listings about to close) — bypass quiet hours via iOS Time Sensitive notifications. You set the line.
SSENSE, Mr Porter, MATCHES, END., Slam Jam, Edit LDN, Dover Street Market, HBX. Brand sites: Sacai, ALD, Stüssy, JJJJound, Acne, Lemaire, Auralee. JP archive: Yahoo Auctions, Mercari JP. Public pages only. Robots.txt respected.
Three product commitments that make FastBox the right tool for buyers and the wrong tool for resellers. None of these are upsells we declined; all of them are defining product attributes.
FastBox watches public storefronts and pushes you a notification. It never auto-checks-out, never bypasses per-customer limits, never runs residential proxies.
Paid sneaker bots circumvent retailer ToS to flip 40 pairs a week, get household accounts banned, and ruin restocks for everyone else. The arms race against Cloudflare and Arkose Labs is not winnable, and the legal exposure is real.
You polling at human-reasonable rates from your home IP. You complete the purchase yourself in the official app, as a normal logged-in customer. Your retailer accounts stay yours. Your conscience stays yours.
Local-first by design. Your taste profile, watchlist, and alert history live on the box you own. Nothing replicates to our servers; nothing becomes someone else's data product.
Every shopping app builds a profile on you. SSENSE, MATCHES, Mr Porter — and the third parties they share with — know what you searched, what you abandoned, what you nearly bought. Your wishlist becomes their inventory.
Watchlists stay on the local SSD. Telemetry tied to your identity is not collected. The agent core is open source under MIT. If we shut down tomorrow, the box keeps working.
The deep link goes to the retailer page in your existing session. We never inject affiliate cookies, swap creator codes, or take a cut of your purchase.
Honey was caught in 2024 silently rewriting affiliate attribution at checkout — paying creators less and quietly building a behavioural dataset of every cart you opened. "Free" extensions have a price; you are paying it.
The deep link drops you straight into the retailer, with your existing cashback portal cookie, your creator code, your Rakuten attribution all intact. The hardware is paid for. We have no reason to skim.
One ethernet cable, one USB-C power cable. Boots in under a minute. Pair via the local web UI at fastbox.local. No account, no router changes, no app store.
One screen of plain English. "Sacai, CDG Homme Plus, Junya. Size M shirts, 32 trousers. Archive 2002–2008 only." Paste an Anthropic, OpenAI, or Gemini key — or point at a self-hosted Ollama model for free.
Push alerts in under two seconds when a match lands. The notification names the piece, the size, the price. Tap, deep-link to the retailer's app, and the piece is yours.
We are committing to a small first run so we can build it carefully, ship slowly, and listen closely. Joining the waitlist is free and non-binding.
If you reserve a spot, you skip the public waitlist. The founders'-run price is held for waitlist members first, locked at $379 unless our final BOM lands lower. After that, the next batch will be priced at general availability.
Because phones aggressively kill background polling — iOS in particular limits a backgrounded app to a few minutes of execution per hour. The notification you wanted at 11:14 arrives at 11:48, after the size you wanted is gone. SSENSE's own notifications are batched and arrive after the algorithm decides; IG follows reorder by engagement, not chronology.
FastBox is a dedicated 5-watt instrument that lives next to your router and watches public storefronts at the cadence they actually change. The piece you wanted, the moment it lands — not the moment the algorithm feels like telling you.
A sneaker bot's defining feature is automated checkout — placing the order through stealth browsers and rotating residential proxies designed to defeat retailer anti-bot systems and bypass per-household purchase limits. FastBox does not do that. It pushes a notification. You complete the purchase yourself in the official app, as a normal logged-in customer.
If you are flipping forty pairs of Sacai LDWaffles for resale, this is not the product. This is the product for the buyer who wants one of a thing, in their size, on time.
Out of the box: SSENSE, Mr Porter, MATCHES, END., Slam Jam, Edit LDN, Dover Street Market, HBX, and the brand storefronts of Sacai, Aimé Leon Dore, Stüssy, JJJJound, Carhartt WIP, Acne Studios, Our Legacy, Lemaire, Auralee, Bode, Kapital, Visvim, Engineered Garments, and roughly forty more. JP / EU archive: Yahoo Auctions JP, Mercari JP, Grailed, Vestiaire Collective.
The agent core is open source. New community-contributed source recipes appear in the catalogue as they are added — and you can write your own to point at any RSS feed, Shopify storefront, or marketplace search.
You write a short taste prompt in plain English — see the third step above for the format that works best. Optionally, drop in a few photos of pieces you already own or paste a list of your IG saves to give the model concrete reference. Your BYOK model uses this to score each new item that lands; only matches above your threshold push to your phone.
As you confirm or dismiss alerts, the box keeps a small local feedback log to refine future scoring — none of which leaves your device.
On the object. On your premises. Watchlists, taste profile, alert history, and source recipes all stay on the local SSD. The only outbound traffic is the calls your BYOK AI provider receives directly (paid by you, not us) and Apple Push / Firebase Cloud Messaging for delivering the notifications themselves.
If you ever stop using the box, you keep everything on it. We don't have copies to delete.
Modelled on a typical user — fifty enabled sources, change-diff prefilter active, twenty to thirty new items a day actually scored — we estimate $2 to $6 per month with Claude Haiku 4.5 ($1/M input, $5/M output, verified November 2025). Smaller GPT and Gemini Flash models come in cheaper. Heavy users with two hundred sources land $15 to $30.
You can also point at a self-hosted Ollama model for $0 ongoing AI cost. You pay your provider directly; FastBox never sees your bill.
Target is Q4 2026 for the founders' run (500 units). Joining the waitlist is free; we'll write when reservations open in Q3 2026. We would rather ship a smaller run later than rush hardware that isn't right.
The founders' run ships to the United States and Canada only. Mexico, EU, UK, JP, KR follow in general availability (Q1–Q2 2027) once we have RMA partners and FCC / CE / PSE certifications complete in each region.
The box keeps working. The agent core is open source under MIT, runs locally, and has no required cloud dependency. Your AI key keeps working because you pay the provider directly. The companion app talks to the box on your local network, not through us. Push notifications are delivered via Apple Push and Firebase Cloud Messaging directly from the box's own credentials, which we will hand off to a community fork in the event of a wind-down.
We have seen too many smart-home startups brick their users' hardware. We are designing not to.
Add your email below. We will write with timing as the founders' run opens, and the founders'-run price will be held for waitlist members first.
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