Pay $15 once for 1,500 credits and your so_live_ key appears right after checkout. No signup form: an account is created for the email you pay with, and you can sign in later to manage keys and credits.
1,500 credits for $15. 1 credit = $0.01; an outlier search costs 1 credit. Billing is prepaid with a hard stop at zero: no subscription, no surprise bills.
Pay $15 and get a keySecure checkout by Stripe. The key is shown once on the page after payment and a link to that page is emailed to you.
Any billable call to the API without a key returns HTTP 402 payment_required whose body carries this same payment link under error.payment.checkoutUrl. An agent shows it to its user, the user pays, and the agent continues with the key. The MCP server and the CLI surface the same link.
Prefer the classic route? Create a free account and a key at Settings, API Keys, or follow the step-by-step guide.