chainlink-feeds-mcp

Instructions

Implementation Reference

• index.js:235-258 (handler)

  The handler function for the listSupportedFeeds tool. It generates a Markdown-formatted list of all supported chains and their available price feed names by iterating over the feedsData object.

  async () => {
    try {
      // Prepare Markdown list
      const markdownList = Object.keys(feedsData).map((chain) => {
        const feedNames = feedsData[chain].feeds.map((feed) => feed.name).join(',');
        return `- ${chain}: ${feedNames}`;
      }).join('\n');
  
      return {
        content: [{
          type: 'text',
          text: markdownList
        }]
      };
    } catch (error) {
      return {
        content: [{
          type: 'text',
          text: `Error: ${error.message}`
        }],
        isError: true
      };
    }
  }

• index.js:228-228 (schema)

  Zod schema definition for the listSupportedFeeds tool, which requires no input parameters.

  const listSupportedFeedsSchema = z.object({}).describe('No parameters required');

• index.js:231-259 (registration)

  Registration of the listSupportedFeeds tool via server.tool(), specifying the tool name, description, input schema, and handler function.

  server.tool(
    'listSupportedFeeds',
    'Returns a Markdown list of all supported chains and their price feed names',
    listSupportedFeedsSchema,
    async () => {
      try {
        // Prepare Markdown list
        const markdownList = Object.keys(feedsData).map((chain) => {
          const feedNames = feedsData[chain].feeds.map((feed) => feed.name).join(',');
          return `- ${chain}: ${feedNames}`;
        }).join('\n');
  
        return {
          content: [{
            type: 'text',
            text: markdownList
          }]
        };
      } catch (error) {
        return {
          content: [{
            type: 'text',
            text: `Error: ${error.message}`
          }],
          isError: true
        };
      }
    }
  );