Solana Pay on Carrd: sell for USDC or SOL from a one-page site

Carrd is great for one-page product sites. It works with Solana Pay through its Embed element (Pro plans allow embeds with custom code).

1. Add an Embed element

Add an Embed, set Type to Code and Style to Inline, and paste a buy button that calls your verifier worker. That's the same snippet as the Webflow guide, with a smaller QR (180px) so it fits on mobile.

2. Build the payment URL

solana:YOUR_ADDRESS?amount=12&spl-token=EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v&reference=REF&label=My%20Shop

Leave out spl-token to charge SOL instead. The reference is what lets you find the payment on-chain without a database.

3. Confirm and deliver

Poll your worker every 4 seconds. On paid:true, show the download link or redirect to a hidden Carrd section (use a server-checked link for anything valuable).

4. Checklist

Test with a 0.01 USDC product first.
Show the order reference so buyers can contact you.
Put a contact email on the page for support.

Skip the wiring: the Drop-In Kit (7 USDC) has the checkout and verifier; the Pro Kit (29 USDC) adds a cart, receipts and a dashboard; or have it installed.

Payments are on-chain and final; if delivery fails, email smallbizaicourses@gmail.com with your order reference. Software provided as is. Not financial advice.