Content Fetcher MCP

Instructions

Implementation Reference

• src/server.ts:102-104 (handler)

  The handler function for the fetchGooseBlog tool. It fetches the Goose blog RSS feed using the generic fetchRss helper with the hardcoded URL.
  async function fetchGooseBlog(): Promise<ContentItem[]> { return await fetchRss(GOOSE_BLOG_RSS); }
• src/server.ts:151-156 (registration)

  Registration of the fetchGooseBlog tool in the FastMCP server. No input parameters required; executes the handler and stringifies the JSON output.
  server.addTool({ name: "fetchGooseBlog", description: "Fetch ALL Goose blog posts.", parameters: z.object({}), execute: async () => JSON.stringify(await fetchGooseBlog()), });
• src/server.ts:30-36 (schema)

  Type definition for ContentItem, which structures the output returned by the fetchGooseBlog handler.
  interface ContentItem { id: string; title: string; url: string; published_at: string; type: "video" | "blog" | "release"; }
• src/server.ts:87-97 (helper)

  Generic RSS fetching helper used by fetchGooseBlog to parse the RSS feed and map items to ContentItem objects.
  async function fetchRss(url: string): Promise<ContentItem[]> { const feed = await rssParser.parseURL(url); return feed.items.map((item) => ({ id: item.guid || item.link || "", title: item.title || "", url: item.link || "", published_at: item.pubDate || "", type: "blog" as const, })); }
• src/server.ts:23-23 (helper)

  Hardcoded RSS URL for the Goose blog, used exclusively by the fetchGooseBlog handler.
  const GOOSE_BLOG_RSS = "https://block.github.io/goose/blog/rss.xml";