The latest articles on DEV Community by 大G (@g_dd577b335a15bed2c483cf). https://dev.to/g_dd577b335a15bed2c483cf https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3914535%2F6d3501ca-7a50-47ab-b2a4-d9b2300f2bb8.jpg https://dev.to/g_dd577b335a15bed2c483cf en 大G Tue, 05 May 2026 18:15:52 +0000 https://dev.to/g_dd577b335a15bed2c483cf/i-built-an-ai-api-with-instant-usdc-payments-x402-protocol-3lf5 https://dev.to/g_dd577b335a15bed2c483cf/i-built-an-ai-api-with-instant-usdc-payments-x402-protocol-3lf5 <p>I Built an AI API with Instant USDC Payments</p> <p>I've been experimenting with the <strong>x402 protocol</strong> (HTTP 402 + EIP-3009) and built a pay-per-call AI API.</p> <p><strong>How it works</strong></p> <p>Unlike traditional AI APIs that require:</p> <ul> <li>Account registration</li> <li>Credit card on file </li> <li>Monthly minimums</li> </ul> <p>This API uses <strong>crypto-native payments</strong>:</p> <ol> <li>Make a request → Get 402 with payment info</li> <li>Sign USDC transfer (no ETH needed, thanks to Facilitator)</li> <li>Retry → Get instant response</li> <li>Funds settle on Base L2 in ~2 seconds</li> </ol> <p><strong>Tech Stack</strong></p> <ul> <li> <strong>Backend</strong>: FastAPI</li> <li> <strong>AI Model</strong>: DeepSeek-V3</li> <li> <strong>Payment</strong>: x402 Protocol (Coinbase)</li> <li> <strong>Settlement</strong>: Base L2 (USDC)</li> </ul> <p><strong>Pricing</strong></p> <ul> <li><strong>$0.01 per API call</strong></li> <li>No subscriptions</li> <li>No minimums</li> </ul> <p><strong>Try it free</strong><br> Free demo (no payment needed): <a href="https://is.gd/UdfAua" rel="noopener noreferrer">https://is.gd/UdfAua</a></p> <p><strong>Why this matters</strong></p> <p>The x402 protocol could enable a new wave of <strong>micropayment-native APIs</strong> where you truly pay per use without friction.</p> <p>Thoughts? Has anyone else experimented with x402 or similar crypto-native payment patterns?</p> <h1> webdev #ai #web3 #tutorial #python </h1> ai api showdev web3