Install

Deno

deno add jsr:@mastrojs/feed

Node.js

pnpm add jsr:@mastrojs/feed

Usage

Put this e.g. in routes/feed.xml.server.ts:

import { atomResponse } from "@mastrojs/feed";
import { html } from "@mastrojs/mastro";
const baseUrl = "https://mywebsite.org/";
export const GET = () => {
  // read feed entries here from db or markdown files
  const entries = [{
    title: "Test",
    id: new URL("blog/test/", baseUrl),
    updated: new Date("2025-01-01"),
    content: html`Less: <em> &lt; </em>`,
  }];
  return atomResponse({
    title: "My Blog",
    id: new URL(baseUrl),
    linkSelf: new URL("feed.xml", baseUrl),
    updated: new Date("2025-01-01"),
    author: { name: "me" },
    entries,
  };
}

And don't forget to advertise your feed from your HTML page. For example:

<link rel="alternate" type="application/atom+xml" href="/feed.xml">

To learn more, see the @mastrojs/feed API docs.