buy · sandbox card · cheaper rails first

Add credit.

Verifying stays free. Credit is for issuing. Card checkout is Square sandbox — a test card can finish. It is not a live production charge.

cheaper first

  1. x402

    An agent tops up on the x402 rail without this page. See payments and the MCP server.

  2. USDC

    Settle direct. Write to billing@scytalex.com from the account address.

  3. invoice

    Card or ACH on a Scytalex invoice. Request one.

sandbox card

Sign in on the account console and pay a catalog pack with a Square sandbox test card. Amounts come from the server catalog, not this page. Entitlement lands when the webhook grants — a charge is not a credit until then.

Open sandbox checkout https://account.pcrzero.com/buy.