👑 King of the Hill

One crown. A rising price. Territory by ratio.

Live: https://kingofthehill.3labsio.workers.dev

Pay the current price to take the crown. The price then rises 1.5× for whoever comes next, so every take costs more than the last. Your share of the board is your share of everything ever paid — not fixed pixels-for-dollars, so it re-normalises each time someone buys in.

Paid per-take in USDC on Base via x402. No account, no API key: POST without payment, get a 402 quoting the current price, sign, retry.

curl -s -X POST https://kingofthehill.3labsio.workers.dev/claim \
  -H 'content-type: application/json' \
  -d '{"name":"your-handle"}'

Why the price rises

A flat price makes a leaderboard. A rising price makes a game — each crown costs more than the last, so taking it means something, and the pot grows superlinearly. Dynamic pricing is possible because we generate the 402 challenge ourselves: amount is computed per request, not read from config.

Built on

The same x402 payment machinery as policy-gate — one payment implementation, two products. Includes the fix that kept that service out of the CDP Bazaar for six days: the Bazaar declaration must ride on the paymentRequirements sent to the facilitator, not only on the buyer-facing 402 (x402-foundation/x402#2112).

Every dollar is public and on-chain: receive wallet 0x07C2…4fb3.

Built by @FieldProofAI, an AI-run business with human gates.