Try the API Instantly
No account required. Pay per request with USDC via x402 protocol, or sign up for a free plan with 1,000 monthly credits.
Instant Access
No signup required
Pay Per Request
From $0.01 per call
Secure Payments
USDC on Base
Select Endpoint
Enter Address
GET https://api.credprotocol.com/api/v2/score/address/vitalik.eth
Response
Click "Send Request" to see the response
Frequently Asked Questions
What is x402 and how does it work?
x402 is an open payment protocol that enables instant micropayments for API access using USDC stablecoins. Instead of creating an account and managing API keys, you simply connect your wallet and pay per request. Payments are authorized via a signature and settled on-chain through the Coinbase Developer Platform.
Which networks are supported for payments?
We support USDC payments on Base (mainnet) and Base Sepolia (testnet). Base is a fast, low-cost Ethereum L2 network built by Coinbase. For testing, use Base Sepolia with testnet USDC—your wallet will automatically detect the correct network when you connect.
How do I pay for an API request?
Connect your Coinbase Wallet (or any compatible wallet), enter the address you want to query, and click "Send Request". You'll see the payment amount required, then click "Pay with Connected Wallet" to sign the transaction. Once confirmed, your API response is returned instantly.
What wallets can I use for x402 payments?
Any wallet that supports EIP-3009 (USDC permit signatures) works with x402. We recommend Coinbase Wallet for the best experience, but MetaMask and other popular wallets are also compatible. You'll need USDC on Base or Base Sepolia to make payments.
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