Business plan or higher
Code Injection and script-bearing Code Blocks run on Business and Commerce plans. Personal plans strip the code on save.
Sell from the Squarespace page you already keep, without moving your life into Squarespace Commerce. The button is one Code Block on the page.
In Settings, open Advanced, then Code Injection, and paste the script tag into the Header field. It loads on every page of the site.
<script src="https://sdk.coinmoebius.com/latest/sdk.global.js"
crossorigin="anonymous"
defer></script>Open your project, switch to the Products tab, and add the product: a reference you choose, a name, a price, a currency. From here the dashboard writes both blocks on this page with your real project ID. What you see below is the shape.
On the page where you sell, add a Code Block where the button belongs and paste the button into it. Save and the page is a store.
<coin-moebius-buy
project-id="proj_YOUR_ID_HERE"
product-id="t-shirt-medium"
label="Buy a t-shirt">
</coin-moebius-buy>Publish. The button renders with the page, and the payment picker loads the first time a buyer clicks it. Each additional product is the same block with a different reference and label.
Code Injection and script-bearing Code Blocks run on Business and Commerce plans. Personal plans strip the code on save.
The button is its own checkout with its own dashboard. Products in Squarespace's store are untouched; the two sell side by side.
Squarespace Code Blocks are one of the surfaces the docs list as confirmed working.
Free covers 150 transactions a month. No card to sign up.