[Add] agent-payment-mcp — x402 payment rail for AI agents (Claude Code MCP server)

[evidai]

agent-payment-mcp

What it does: An x402-native payment rail for AI agents. Your endpoint returns 402 + accepts[] when budget is missing; the agent presents a hard-capped Buyer Key (bk_…), mints a Pay Token JWT, and passes the gateway with a Bearer. No per-call API key. No human in the loop.

Why include:

• One of the few production x402 implementations with real money LIVE
• $1 off-session card charge verified end-to-end on 2026-06-02
• Custody-free (virtual balance, no pool) — FSA-cleared design
• 0% fee for first 3,000 calls, 3% after
• Supports both USD (Stripe off-session) and USDC (Base) through the same gateway

Links:

• Homepage: https://lemoncake.xyz
• Demo (no signup, 30s): https://lemoncake.xyz/demo
• npm: npx agent-payment-mcp — v0.9.3 (https://www.npmjs.com/package/agent-payment-mcp)
• GitHub: https://github.com/evidai/agent-payment-mcp
• Glama (score A, 92%): https://glama.ai/mcp/servers/evidai/lemon-cake

Author: evidai (contact@aievid.com) · MIT license · published 2026

Happy to adjust the category placement or description format to fit the list. Thanks for maintaining this directory!