Halowerk MCP Server

by halowerkio.github.halowerk/halowerk-mcpv0.1.1

HALOWERK services as MCP tools, paid per call with x402 on Base. No account, no login, no subscription — a throwaway wallet with a few dollars is enough.

0Node.jsstdioofficial registry

context tax

queued

security

queued

cold start

queued

freshness

Maintained58d ago

Install Halowerk MCP server

claude mcp add halowerk -e HALOWERK_PRIVATE_KEY='<halowerk-private-key>' -- npx -y halowerk-mcp

{
  "mcpServers": {
    "halowerk": {
      "command": "npx",
      "args": [
        "-y",
        "halowerk-mcp"
      ],
      "env": {
        "HALOWERK_PRIVATE_KEY": "<halowerk-private-key>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "halowerk": {
      "command": "npx",
      "args": [
        "-y",
        "halowerk-mcp"
      ],
      "env": {
        "HALOWERK_PRIVATE_KEY": "<halowerk-private-key>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "halowerk": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "halowerk-mcp"
      ],
      "env": {
        "HALOWERK_PRIVATE_KEY": "<halowerk-private-key>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "halowerk": {
      "command": "npx",
      "args": [
        "-y",
        "halowerk-mcp"
      ],
      "env": {
        "HALOWERK_PRIVATE_KEY": "<halowerk-private-key>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
HALOWERK_PRIVATE_KEY	—	yes	Private key of the paying wallet, hex with or without 0x. Use a throwaway wallet holding only a few dollars of USDC on Base. Without it, only the free catalogue and price tools work.
HALOWERK_MAX_PREIS_USDC	—	—	Ceiling per call in USDC. A more expensive service is refused, not bought. Default 0.05.
HALOWERK_BUDGET_USDC	—	—	Ceiling per session in USDC. Once reached the server refuses further paid calls. Default 1.00.
HALOWERK_MODUS	—	—	hero (12 curated services, default), gateway (3 meta-tools, smallest context) or all (70 services).
HALOWERK_TROCKEN	—	—	Set to 1 for a dry run: returns price and call plan, pays nothing.

Freshness

Maintained — last maintenance signal 58d ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-08-12 · 58d ago · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
2026-08-12 · 58d ago · official registry · v0.1.1

FAQ

›How do I install the Halowerk MCP server in Claude Code?

Run: claude mcp add halowerk -e HALOWERK_PRIVATE_KEY='<halowerk-private-key>' -- npx -y halowerk-mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Halowerk require an API key?

Yes. It expects HALOWERK_PRIVATE_KEY, of which 1 is a secret.

›Can I use Halowerk as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is Halowerk in the official MCP registry?

Yes, as io.github.halowerk/halowerk-mcp.