Live demo
Each article below is encrypted in the page. The key stays with the unlock service until a payment settles, then your browser decrypts the text. Readers can pay by card on the publisher's own Stripe account or in USDC on Base. AI agents pay with a signed x402 payment; see how agents pay.
These demos sell in USDC only, with no card option. On the Base demos you pay real USDC to Charthouse Ltd, the seller, and Charthouse never holds a publisher's money. Prefer not to spend anything? Use the test network article.
USDC on Base (real money)
A normal sealed article. Pay with a wallet, and the key is released once the payment settles.
USDC on Base (real money)
A one-cent sale, to show a price too small for a card.
Test USDC on Base Sepolia (free, no real money)
The same flow on a test network. Use this one if you only want to see how it works.
USDC on Base (real money)
A signed licence to train AI models on the $1.00 article. You get a readable summary and a JSON file you can download.
Seller: Charthouse Ltd, company number 12795844. Digital content, available immediately: by paying you agree to immediate access and acknowledge you lose the 14-day right of withdrawal. Questions: hello@crawlertoll.com.