Gives AI agents a persistent identity token that survives across sessions and merchants. Wraps the Badge SDK's three-tier credential ladder (guest pass, badge token, authenticated identity) and exposes lifecycle tracking via MCP tools. Agents declare visits to merchant sites, report outcomes like "not_denied", and accumulate trust over time through a portable kyaScore (500–850 range). The MCP server is a convenience layer for Claude Desktop and similar clients. If you're building a framework or platform, use the SDK directly. It's zero-dependency, offline-resilient, and issues credentials on first run with no signup required. Integrates with UCP as an identity credential provider using ES256-signed JWTs.
claude mcp add --transport stdio io.github.payclaw-badge -- npx -y @payclaw/badge