Agent Card — Payment Skill
Give your AI agent a virtual MasterCard. Agent Card lets agents autonomously create, fund, and manage virtual MasterCard cards by paying in USDC on the Stellar blockchain.
What It Does
- Create cards — Issue virtual MasterCards with per-card spend limits
- Fund cards — Top up existing cards with USDC
- Manage cards — List, freeze, unfreeze, and inspect card details
- On-chain payments — Every transaction uses the x402 protocol on Stellar with verifiable on-chain proof
Setup
npx @asgcard/cli onboard -y
This creates a Stellar wallet (~/.asgcard/wallet.json), configures the MCP server, and installs the payment skill. Your agent is ready to pay in under 30 seconds.
MCP Tools (9 available)
| Tool | Description |
|---|---|
get_wallet_status |
Wallet address, USDC balance, readiness |
create_card |
Create virtual MasterCard (x402 payment) |
fund_card |
Top up existing card |
list_cards |
List all wallet cards |
get_card |
Card summary |
get_card_details |
PAN, CVV, expiry (nonce-protected) |
freeze_card |
Freeze a card |
unfreeze_card |
Re-enable a card |
get_pricing |
Current tier pricing |
Use Cases
- Pay for API credits (Anthropic, OpenAI, Google Cloud)
- Provision cloud infrastructure (DigitalOcean, Vercel)
- Buy domains, SaaS subscriptions, and developer tools
- Any merchant that accepts MasterCard