heade.rs: look up any domain or IP address

  curl heade.rs/example.com        the report, as text
  curl heade.rs/1.1.1.1            IPv4 and IPv6 work too
  curl heade.rs/api/example.com    the same report as JSON
  curl heade.rs/help               this text

The same report as Markdown, for agents:
  curl -H "Accept: text/markdown" heade.rs/example.com

For MCP clients, a lookup tool at https://heade.rs/mcp:
  claude mcp add --transport http heade-rs https://heade.rs/mcp

In a browser: https://heade.rs