134 paid APIs as MCP tools, billed per call in USDC on Base. No account, no login.
To add halowerk-mcp to Claude, run the install command below or copy the ready-made config for Claude Code, Claude Desktop, Cursor and VS Code further down. Restart your client after adding it and its tools show up in your next conversation. It needs 5 environment variables, listed below.
Install
npx -y halowerk-mcp@0.1.1Environment variables
HALOWERK_PRIVATE_KEYSet in your MCP configHALOWERK_MAX_PREIS_USDCSet in your MCP configHALOWERK_BUDGET_USDCSet in your MCP configHALOWERK_MODUSSet in your MCP configHALOWERK_TROCKENSet in your MCP configInstall with your client
claude mcp add halowerk --env HALOWERK_PRIVATE_KEY=<YOUR_HALOWERK_PRIVATE_KEY> --env HALOWERK_MAX_PREIS_USDC=<YOUR_HALOWERK_MAX_PREIS_USDC> --env HALOWERK_BUDGET_USDC=<YOUR_HALOWERK_BUDGET_USDC> --env HALOWERK_MODUS=<YOUR_HALOWERK_MODUS> --env HALOWERK_TROCKEN=<YOUR_HALOWERK_TROCKEN> -- npx -y halowerk-mcp@0.1.1
Run this in a terminal to add the server to Claude Code.
What this does
halowerk-mcp exposes a set of tools to Claude over the Model Context Protocol. After you add it to claude_desktop_config.json (snippet above) and restart Claude Desktop, those tools become callable inside any conversation.
Requirements
This server needs the following environment variables to be set before it can run:
HALOWERK_PRIVATE_KEY HALOWERK_MAX_PREIS_USDC HALOWERK_BUDGET_USDC HALOWERK_MODUS HALOWERK_TROCKEN
Set these via the env object in your MCP config (see claude_desktop_config.json snippet above).
Frequently asked questions
How do I install halowerk-mcp?
Run the Claude Code command in the install section to add halowerk-mcp to Claude Code, or copy the ready-made config for your client from the install section on this page. Restart your client afterwards and the tools appear in your next conversation.
Which clients work with halowerk-mcp?
This page carries setup and config for Claude Code, Claude Desktop, Cursor and VS Code. Any other MCP client that accepts a standard server config can connect to halowerk-mcp as well.
Does halowerk-mcp need an API key?
Yes. Before it can run, set these environment variables: HALOWERK_PRIVATE_KEY, HALOWERK_MAX_PREIS_USDC, HALOWERK_BUDGET_USDC, HALOWERK_MODUS, HALOWERK_TROCKEN. They go in the env block of your MCP config.
Imported from the Official MCP Registry. The details above come from the registry entry; the maker can claim this listing to correct them, add docs, and see its traffic.
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