MCP servers for Codex CLI

Real-time US and Canadian sales and use tax rates by address or geo coordinates.

Zonnon MCP: 20 real tools to read, check, lint, scaffold, build and run Zonnon code.

MCP server for AI agents to discover campaigns by humans and donate USDC directly on Base.

Read-only access to a Zoopit account: orders, routes, fleet and live vehicle positions.

Swiss income tax by municipality, cheaper-town ranking, apartment listings and commute times.