What is KAMIYO

Payment Verification Infrastructure

x402 is an API for verifying USDC payments across blockchains. Developers use it to confirm payments before granting API access.

When a user sends USDC, submit the transaction hash to our API. We check the blockchain and return whether the payment is valid.

Works on Solana, Base, Ethereum, Polygon, Arbitrum, Optimism and more. One API endpoint for all chains. 99.9% uptime, responses under 500ms.

Core Capabilities

1. Transaction Verification: Check USDC payments on-chain with correct amount and recipient.

2. Multi-Chain Support: One API for 8+ blockchains.

3. Developer SDKs: Python and JavaScript libraries with TypeScript support.

4. Risk Scoring: Fraud detection on Pro and Enterprise plans.

5. Usage-Based Pricing: Free tier: 1,000 verifications/month. Paid plans up to unlimited.

6. ERC-8004 Support: AI agents can verify their own payments.

How It Works

• User Makes Payment:
  Your customer sends USDC to your wallet address on any supported blockchain. They receive a transaction hash from their wallet.

• Submit for Verification:
  Your API receives the transaction hash. Call x402 to verify the payment.

• Instant Confirmation:
  We check the blockchain and return results in under 500ms.

• Grant Access:
  If verified, grant access. If not, reject the request.

Our Mission

We built x402 because verifying crypto payments is tedious. Every blockchain has different RPC endpoints, transaction formats, and confirmation rules.

We handle the blockchain complexity. You just make one API call with a transaction hash and get back whether it's valid.