MCP server · source category: Security
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…
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.
Record
- Type
- MCP server
- Category
- Security & Identity
- Authentication
- API key
- Pricing
- Free
- Documentation
- https://github.com/zekebuilds-lab/captcha-mcp
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