One picker, every way to take money
Cards via Stripe, crypto via NOWPayments, pay-by-mail for cash, checks, or Goldbacks. Same picker, same dashboard, same plan. Turn rails on and off whenever.
Observatory · I
Sell anything from any page you made.
Paste the buy button on the page you want to sell from. Pick the ways you accept payment — card, crypto, or mail. We handle everything that has to happen on a server, so you don't need one.
How it works
Three steps from "I made a page" to "I just got paid."
I
Paste the buy button
A few lines of HTML on whatever page sells your thing. Paste it as many times as you have things to sell.
II
Your buyer picks how to pay
Card, crypto, or pay-by-mail. The picker shows only the rails you turned on. They never leave the flow.
III
We confirm and log it
We do the part that needs a server: verify the payment, log the transaction, send the buyer to your success page. You see it in the dashboard.
Why this is different
Six things we do because the alternatives don't.
Buyers can't fake the price
Prices live in your dashboard, not in your HTML. Editing the page in a browser changes what's shown but not what gets charged.
Tip jars and pay-what-you-want, too
Flip on ad-hoc mode and the buyer picks the amount. Same button, no extra wiring. Built for donations, tips, and pay-what-you-feel.
You can leave whenever
The whole thing runs on an open-source SDK. If we go away, or you just want out, you point it at your own server and your site keeps working. We can't lock you in.
We never touch your money
Payments flow through your own Stripe and crypto accounts. We're a router and a logbook — not a bank. An upstream freeze hits you the way it would have anyway, and our copy of the data is minimal by design.
The less we store, the less we lose
No buyer emails, addresses, or raw payment data. Just the amount, the status, and the provider's event id. IPs are hashed before storage.
Works on the page you already have
If your site lets you paste a few lines of HTML on a page, the buy button works there. No plugin, no platform extension, no framework rewrite.
- Astro
- Hugo
- Eleventy
- Jekyll
- plain HTML
- Webflow
- Carrd
- Framer
- Squarespace
- WordPress
- Ghost
- Notion sites
Anywhere else that takes an HTML embed works too. The dashboard shows you the exact lines to paste, with your project's id already filled in.
For developers, the SDK is the whole product
The buy button is the easy way. The hard way is also fine.
SDK
The open-source SDK ships every provider, every signature check, every status code. Build your own checkout UI on top of our hosted webhook and /status endpoint, or run the whole thing on your own server and skip us entirely.
The Cloud is the convenience layer. The SDK is the product. We maintain both — and we use the SDK ourselves to bill for the Cloud, so an outage in our own integration breaks our own checkout first.
Try it on the page you're working on right now
Free tier covers most sites and doesn't ask for a card. Pro is $10/month when one of your products takes off.