rundida-mcp

Instructions

Implementation Reference

• index.js:312-336 (handler)

  The handler function and registration for the 'marathon_countdown' tool. It fetches marathon data from an API and calculates the time remaining until the race date.

  // Tool: marathon_countdown
  server.tool(
    'marathon_countdown',
    'Get a countdown to a specific marathon event',
    { id: z.string().describe('Marathon ID, e.g. "tokyo2026", "boston2026"') },
    async ({ id }) => {
      const data = await fetchJSON(`${BASE_URL}/api/marathons/${id}.json`);
      const m = data.marathon;
      const raceDate = new Date(m.date + 'T00:00:00');
      const now = new Date();
      const diff = raceDate - now;
  
      if (diff <= 0) {
        return { content: [{ type: 'text', text: `${m.name.en} has already taken place on ${m.date}.` }] };
      }
  
      const days = Math.floor(diff / (1000 * 60 * 60 * 24));
      const hours = Math.floor((diff % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
  
      let text = `${m.name.en} Countdown\n\n`;
      text += `${days} days, ${hours} hours until race day\n`;
      text += `Date: ${m.date}\nCity: ${m.city}\n`;
      text += `\nLive countdown: ${m.links.countdown}`;
      return { content: [{ type: 'text', text }] };
    }