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mcp/harbor
Claude Code

Countersign for Claude Code

io.github.countersign-network/countersign

Kill switch + spend guard for AI agents that spend money, across every wallet vendor at once.

client:Claude Code transport:stdio runtime:npm

Install Countersign in Claude Code

run in your project directory

Held in this page only — never stored, logged, or sent anywhere but back to your screen. 

claude mcp add countersign -e COUNTERSIGN_URL=<COUNTERSIGN_URL> -e COUNTERSIGN_API_KEY=<COUNTERSIGN_API_KEY> -- npx -y @countersign/mcp

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs

Countersign in other clients

Countersign MCP server