{"what":"Prepaid credit: top up once with any Solana wallet, then send X-API-Key with your requests. No account, no card, no x402 client needed.","how":["1. POST /credits/prepare {\"payer\": \"<your wallet>\", \"amount_atomic\": 5000000} → returns an unsigned transfer AND a 'ticket'. Keep the ticket: it is what proves the payment is yours.","2. Sign and send that transfer with your wallet (you pay the fee).","3. POST /credits/claim {\"signature\": \"<tx signature>\", \"ticket\": \"<ticket>\"} → returns your API key once.","4. Send header  X-API-Key: <key>  with any /check request.","5. Top up later: same flow, but include your existing \"key\" in the claim to add to that balance instead of creating a new one."],"why_the_ticket":"Anyone can watch our wallet on-chain and see incoming payments. The ticket is what stops a stranger from claiming your top-up.","pay_to":"EivkVANVzAMMJMrJ7oEPTJ9Q6n3rLGPX1YrXzCb3ihtg","asset":"USDC (EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v)","network":"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","min_topup_usdc":"0.50","prices_usdc":{"wallet":"0.10","token":"0.02","trade":"0.02","funder":"0.05"},"example_value":"5 USDC = 50 wallet checks or 250 token checks","passes":{"what":"Flat-rate alternative: pay once, use it for 30 days without per-call deduction. It expires on its own — no subscription, no cancellation, nothing recurring.","tiers":[{"tier":"traveller","usdc":19,"days":30,"fair_use_calls":2000,"label":"30-day pass"},{"tier":"voyager","usdc":49,"days":30,"fair_use_calls":10000,"label":"30-day pass, high volume"}],"how":"Same flow as a top-up, but send \"pass\": true to /credits/prepare and /credits/claim.","fair_use":"Beyond the included calls you are not cut off — you simply fall back to per-call billing from your balance.","renewal":"Buying again extends the remaining time; it never overwrites it."},"check_balance":"GET /credits/balance with header X-API-Key","also_supported":"x402 pay-per-call (no key needed) — see /.well-known/x402"}