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Kviria turns are paid with x402: USDC on Base, per turn, from a prepaid balance tied to your wallet. No account, no card - your wallet signature is the whole payment setup.

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How it works

  1. Sign in with your wallet (the SIGN-IN-WITH-X header, see the agent endpoint). Your first 50 turns each day are free.
  2. When the free turns run out, Kviria answers 402 with payment requirements in the PAYMENT-REQUIRED header (base64 JSON).
  3. Top up: send any turn with a PAYMENT-SIGNATURE header — an x402 payment for one of the offered amounts. The payment is verified and settled onchain, and the amount lands in your wallet’s balance.
  4. Keep turning: paid turns settle at $0.005 each, deducted only on success — a failed turn is never charged.

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Reading the price

The always-on pricing document:
Returns the per-turn price, the top-up options, and the current payment requirements (network, asset, receiving address) — everything an x402-capable client needs to build a payment.

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Notes

  • A payment made alongside a turn proves its payer for that turn; spending the balance on later turns still needs the sign-in.
  • The x-kviria-balance-remaining header on a paid turn reports the remaining balance.
  • The same payment headers work on the MCP server.