Captcha MCP Server
by zekebuilds-labio.github.zekebuilds-lab/captcha-mcpv0.1.1
Middleware that gates MCP tool calls behind a Hashcash proof-of-work challenge or an L402 Lightning payment via self-hosted LNbits.
context tax
queued
security
queued
cold start
queued
freshness
Maintained2mo ago
Install Captcha MCP server
Install in Claude Code
claude mcp add captcha -- npx -y @powforge/captcha-mcpInstall in Cursor
{
"mcpServers": {
"captcha": {
"command": "npx",
"args": [
"-y",
"@powforge/captcha-mcp"
]
}
}
}Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).
Install in Claude Desktop
{
"mcpServers": {
"captcha": {
"command": "npx",
"args": [
"-y",
"@powforge/captcha-mcp"
]
}
}
}Settings → Developer → Edit Config (claude_desktop_config.json), then restart.
Install in VS Code
{
"servers": {
"captcha": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@powforge/captcha-mcp"
]
}
}
}Add to .vscode/mcp.json in your workspace.
Install in Windsurf
{
"mcpServers": {
"captcha": {
"command": "npx",
"args": [
"-y",
"@powforge/captcha-mcp"
]
}
}
}Add to ~/.codeium/windsurf/mcp_config.json.
Configuration
| Variable | Required | Secret | Description |
|---|---|---|---|
| CAPTCHA_URL | — | — | PowForge captcha backend URL. Defaults to public production endpoint when running via npx; override for self-hosted or local dev. |
Freshness
Maintained — last maintenance signal 2mo ago. The newest of the signals below sets the band.
Last commit (default branch)
2026-08-09 · 2mo ago · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
2026-05-10 · 5mo ago · official registry · v0.1.1
FAQ
›How do I install the Captcha MCP server in Claude Code?
Run: claude mcp add captcha -- npx -y @powforge/captcha-mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.
›Does Captcha require an API key?
No required environment variables are declared in its published metadata.
›Can I use Captcha as a remote (hosted) MCP server?
No hosted endpoint is published; it runs locally over stdio.
›Is Captcha in the official MCP registry?
Yes, as io.github.zekebuilds-lab/captcha-mcp.
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