heade.rs's MCP server (Streamable HTTP, no sign-in).

Add it to an MCP client with the URL https://heade.rs/mcp, for example:

  claude mcp add --transport http heade-rs https://heade.rs/mcp

It has one tool, lookup, which returns the same report as
curl -H "Accept: text/markdown" https://heade.rs/<domain | IP | AS number>.
Its server card is https://heade.rs/mcp/server-card.