chainlink-sentinel

Instructions

Implementation Reference

• src/mcp/server.ts:148-187 (handler)

  The tool 'sentinel_stablecoins' is registered and implemented within `src/mcp/server.ts` using `server.tool`. It fetches cross-chain feed data, filters for specific stablecoins, calculates deviations from a $1.0 peg, and returns a summary report.

  server.tool(
    "sentinel_stablecoins",
    "Monitor stablecoin pegs (USDC, USDT, DAI) across all chains. Detects depegs and deviations.",
    {},
    async () => {
      const feeds = await crossChainScan();
      const stables = feeds.filter(
        (f) => f.pair.includes("USDC") || f.pair.includes("USDT") || f.pair.includes("DAI")
      );
  
      if (stables.length === 0) {
        return { content: [{ type: "text", text: "No stablecoin feeds found." }] };
      }
  
      const lines = stables.map((f) => {
        const dev = Math.abs(f.price - 1.0) * 100;
        const status = dev > 5 ? "DEPEG" : dev > 1 ? "WARNING" : "OK";
        return `${f.pair.padEnd(10)} ${f.chain.padEnd(10)} $${f.price.toFixed(6)} dev: ${dev.toFixed(3)}% [${status}]`;
      });
  
      const maxDev = Math.max(...stables.map((f) => Math.abs(f.price - 1.0) * 100));
      const overallStatus = maxDev > 5 ? "DEPEG ALERT" : maxDev > 1 ? "WARNING" : "ALL STABLE";
  
      return {
        content: [
          {
            type: "text",
            text: [
              `**Stablecoin Monitor — ${overallStatus}**`,
              `Feeds: ${stables.length} stablecoin feeds across ${[...new Set(stables.map((s) => s.chain))].length} chains`,
              "",
              "```",
              ...lines,
              "```",
            ].join("\n"),
          },
        ],
      };
    }
  );