[](https://glama.ai/mcp/servers/zekebuilds-lab/captcha-mcp) 📇 🏠 🍎 🪟 🐧 - L402 Lightning paywall + Hashcash proof-of-work gate for MCP tool calls. Free tier solves a PoW challenge; paid tier pays a Lightning invoice via self-hosted LNBits. No accounts, no API keys, no third-party SaaS. Drop-in middleware for any MCP server. `npx @powforge/captcha-mcp`.
Cross-referenced across 55 tracked directories
#52205
Popularity Rank
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6/6/2026
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n1474335
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