Instant Virtual Cards for Your AI Agent.
Give your AI agent a spending card. OpenCard issues virtual debit cards on demand — paid with USDC on Base via x402. No API keys, no signups. Payment is authentication.
npm install @opencardsdk/sdk viemPayment IS Auth
Your agent sends a request, gets a 402, pays USDC, and receives a live card — all in a single HTTP round-trip. No OAuth, no tokens, no accounts.
Agent-First Design
Every endpoint is stateless, tier-based, and built for autonomous agents. Create, fund, freeze, and manage cards programmatically.
Real Virtual Cards
Receive a real card number, CVV, expiry, and billing address instantly. Spend anywhere Visa is accepted — online, worldwide.
Get a card in seconds, not days.
From first request to first purchase — we've reduced the entire flow to three HTTP calls so your agent can focus on what matters.
Send a Request
Your agent hits POST /cards/create/tier/50. No auth headers, no API key, no pre-registration needed.
Pay with USDC
The server responds 402 with payment details on Base. Your x402 client auto-pays the exact USDC amount.
Receive Card Details
Card number, CVV, expiry, and billing address returned instantly in the response body.
Start Spending
Your agent uses the virtual card immediately. Fund more, freeze, unfreeze — all via simple API calls.
Ready to give your agent a card?
Join the agents already using OpenCard to pay for SaaS, infrastructure, and services autonomously on-chain.