zekebuilds-lab/captcha-mcp
by Various
MCP server for PoW + Lightning agent auth — charge AI agents per-call without accounts. npm: @powforge/captcha-mcp
MCP
zekebuilds-lab/captcha-mcp
Added 7 June 2026
Overview
A Model Context Protocol (MCP) server that authenticates AI agents using Proof of Work and Lightning Network payments. It charges agents per API call without requiring traditional accounts. Implemented in JavaScript as an npm package.
Best for
Best for
Developers building monetized agent APIs or wanting accountless authentication
Use cases
- Authenticate AI agents in MCP-compatible applications
- Implement pay-per-call billing for agent APIs
- Add abuse protection via PoW challenges
Notes
A Model Context Protocol (MCP) server that authenticates AI agents using Proof of Work and Lightning Network payments. It charges agents per API call without requiring traditional accounts. Implemented in JavaScript as an npm package.
0 stars on GitHub. Last updated 2026-05-14. Licensed MIT.
Use cases
- Authenticate AI agents in MCP-compatible applications
- Implement pay-per-call billing for agent APIs
- Add abuse protection via PoW challenges
Pros
- No account registration needed
- Built-in microtransactions via Lightning Network
- Open-source and easy to integrate
Cons
- Early stage with no community adoption
- Requires Lightning Network infrastructure
- PoW increases response latency
Indexed from awesome-mcp-servers-punkpeye and enriched against its public facts.
Pros
- No account registration needed
- Built-in microtransactions via Lightning Network
- Open-source and easy to integrate
Cons
- Early stage with no community adoption
- Requires Lightning Network infrastructure
- PoW increases response latency
Pairs with
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