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venice-x402

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Manage Venice x402 wallet credits. Covers POST /x402/top-up (payment discovery + signed USDC settlement, $5 min / $10,000 max), GET /x402/balance/{walletAddress}, GET /x402/transactions/{walletAddress}, USDC on Base (eip155:8453) and Solana mainnet, the PAYMENT-SIGNATURE / SIGN-IN-WITH-X header names, transaction types TOP_UP/CHARGE/REFUND (multi-component charges, request-level refunds, clamped charges), and the 402 PAYMENT-REQUIRED responses returned by x402-enabled endpoints.

skills/venice-x402/SKILL.md

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# Venice x402 (wallet credits)

x402 is Venice's **wallet-based payment** flow. Prepay USDC on Base or Solana mainnet into a wallet credit balance, then authenticate each request with a signed Sign-In-With-X (SIWX) proof — no Venice account or API key required. Three wallet endpoints plus the protocol-level `402` responses.

| Endpoint | Auth | Purpose |
|---|---|---|
| `POST /x402/top-up` | None (discovery) / `PAYMENT-SIGNATURE` (settlement) | Discover payment requirements, then settle a signed USDC transfer. |
| `GET /x402/balance/{walletAddress}` | SIWX (`SIGN-IN-WITH-X`) | Current USD credit balance for a wallet. |
| `GET /x402/transactions/{walletAddress}` | SIWX | Paginated ledger: `TOP_UP`, `CHARGE`, `REFUND`. |

For the SIWX header format itself, see [`venice-auth`](../venice-auth/SKILL.md).

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