Add Agent Cards MCP server

[keyserfaty]

Summary

• Adds Agent Cards to the community servers list
• Agent Cards gives AI agents prepaid virtual Visa cards with fixed budgets
• Tools: list_cards, create_card, get_card_details, check_balance, close_card, x402_fetch, support chat
• Transport: HTTP (Streamable HTTP) + stdio

Details

Agent Cards is an MCP server that lets AI agents create and spend prepaid virtual Visa cards. Each card has a fixed USD budget, real card credentials, and full MCP integration. Agents can create cards, make payments, check balances, and handle 402 Payment Required responses automatically via the x402 protocol.

Install: npx agent-cards setup-mcp

[olaservo]

Thanks for contributing to the MCP servers repo!

We've retired the third-party server list from the README in favor of the MCP Registry — see #3950 for context. The Official Integrations and Community Servers sections no longer exist in the README, so this PR no longer has a target.

Going forward, please publish your server to the MCP Registry using the quickstart guide:
https://github.com/modelcontextprotocol/registry/blob/main/docs/modelcontextprotocol-io/quickstart.mdx

That's where server discovery now happens. Thanks for building on MCP!

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Note: I'm working through the backlog with help from Claude Code to give everyone a prompt response.