chainlink-sentinel

Instructions

Implementation Reference

• src/mcp/server.ts:110-145 (handler)

  The handler implementation for the `sentinel_feed` tool, which uses `readFeed` to retrieve price data and formats it as Markdown.

  server.tool(
    "sentinel_feed",
    "Read a single Chainlink price feed (e.g., BTC/USD on ethereum)",
    {
      chain: z.enum(chains as [string, ...string[]]).describe("Chain name"),
      pair: z.string().describe("Price pair (e.g., BTC/USD, ETH/USD, LINK/USD)"),
    },
    async ({ chain, pair }) => {
      const feed = await readFeed(chain, pair);
      if (!feed) {
        const available = Object.keys(FEED_REGISTRY[chain] || {}).join(", ");
        return {
          content: [
            {
              type: "text",
              text: `Feed ${pair} not found on ${chain}. Available: ${available || "none"}`,
            },
          ],
        };
      }
      return {
        content: [
          {
            type: "text",
            text: [
              `**${feed.description}** (${feed.chain})`,
              `Price: $${feed.price.toFixed(4)}`,
              `Decimals: ${feed.decimals}`,
              `Round ID: ${feed.roundId}`,
              `Updated: ${feed.updatedAt.toISOString()} (${Math.floor(feed.staleness / 60)}m ago)`,
            ].join("\n"),
          },
        ],
      };
    }
  );