zekebuilds-lab/captcha-mcp

Item: zekebuilds-lab/captcha-mcp
Rating: 39
Author: M8ven

MCP server that gates API calls to AI agents using proof-of-work (free) or Lightning payment (3 sats), providing challenge, verify, and status tools for per-call authentication without accounts.

→ zekebuilds-lab/captcha-mcp · listed on glama

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// key findings

✅

No credential exfiltration, no sensitive file access, no obfuscation

Static analysis found nothing flowing your secrets to unexpected places.

✅

Open source with a license and README

Anyone can audit the code, the license is declared, and the publisher documents what it does.

// required environment variables

This server reads these from process.env. You'll be asked to provide them before it can run.

configCAPTCHA_URL— Set to point at a different captcha backend. Default is http://localhost:3077 so you can run the full stack locally for development. Production deployments point it at https://captcha.powforge.dev.

configHTTP_MODE— Hosted MCP clients (Smithery, browser-based hosts) need HTTP, not stdio. Pass --http or set =1:

configMCP_TRANSPORT

configPORT— HTTP_MODE=1 =3200 npx @powforge/captcha-mcp

configPOWFORGE_RUNE_ID

// full audit trail

The full breakdown of what we checked, the deductions that landed, the network hosts, the dependency advisories, and concrete fix guidance is available to verified publishers.

// improvement guidance — verified publishers only

We have 1 concrete improvement we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.

// embed badge in your README

[![M8ven Score](https://m8ven.ai/badge/mcp/zekebuilds-lab-captcha-mcp-03zgem)](https://m8ven.ai/mcp/zekebuilds-lab-captcha-mcp-03zgem)

commit: b83ec3fcee2399f8f7577b3486bfe8d67da18c41

code hash: 40ae7663155cc74c9ce26c8d9b9e640c90ca9afafd01ef4c1e198d2ffae5649b

verified: 6/11/2026, 11:07:45 AM

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