DexPaprika (CoinPaprika)

Instructions

Implementation Reference

• src/index.js:228-235 (handler)

  The handler function that constructs the DexPaprika API endpoint for retrieving transactions of a specific pool and fetches/formats the response.

  async ({ network, poolAddress, page, limit, cursor }) => {
    let endpoint = `/networks/${network}/pools/${poolAddress}/transactions?page=${page}&limit=${limit}`;
    if (cursor) {
      endpoint += `&cursor=${encodeURIComponent(cursor)}`;
    }
    const data = await fetchFromAPI(endpoint);
    return formatMcpResponse(data);
  }

• src/index.js:221-227 (schema)

  Zod input schema defining parameters for the getPoolTransactions tool: network, poolAddress, page, limit, cursor.

  {
    network: z.string().describe('Network ID from getNetworks (e.g., "ethereum", "solana")'),
    poolAddress: z.string().describe('Pool address or identifier'),
    page: z.number().optional().default(0).describe('Page number for pagination (up to 100 pages)'),
    limit: z.number().optional().default(10).describe('Number of items per page (max 100)'),
    cursor: z.string().optional().describe('Transaction ID used for cursor-based pagination')
  },

• src/index.js:218-236 (registration)

  Registration of the getPoolTransactions tool via server.tool(), including name, description, schema, and handler function.

  server.tool(
    'getPoolTransactions',
    'Get recent transactions for a specific pool. Shows swaps, adds, removes. Requires network and pool address.',
    {
      network: z.string().describe('Network ID from getNetworks (e.g., "ethereum", "solana")'),
      poolAddress: z.string().describe('Pool address or identifier'),
      page: z.number().optional().default(0).describe('Page number for pagination (up to 100 pages)'),
      limit: z.number().optional().default(10).describe('Number of items per page (max 100)'),
      cursor: z.string().optional().describe('Transaction ID used for cursor-based pagination')
    },
    async ({ network, poolAddress, page, limit, cursor }) => {
      let endpoint = `/networks/${network}/pools/${poolAddress}/transactions?page=${page}&limit=${limit}`;
      if (cursor) {
        endpoint += `&cursor=${encodeURIComponent(cursor)}`;
      }
      const data = await fetchFromAPI(endpoint);
      return formatMcpResponse(data);
    }
  );

• src/index.js:10-34 (helper)

  Shared helper function to fetch data from the DexPaprika API, handling errors like rate limits and deprecated endpoints.

  async function fetchFromAPI(endpoint) {
    try {
      const response = await fetch(`${API_BASE_URL}${endpoint}`);
      if (!response.ok) {
        if (response.status === 410) {
          throw new Error(
            'This endpoint has been permanently removed. Please use network-specific endpoints instead. ' +
            'For example, use /networks/{network}/pools instead of /pools. ' +
            'Get available networks first using the getNetworks function.'
          );
        }
        if (response.status === 429) {
          throw new Error(
            'Rate limit exceeded. You have reached the maximum number of requests allowed for the free tier. ' +
            'To increase your rate limits and access additional features, please consider upgrading to a paid plan at https://docs.dexpaprika.com/'
          );
        }
        throw new Error(`API request failed with status ${response.status}`);
      }
      return await response.json();
    } catch (error) {
      console.error(`Error fetching from API: ${error.message}`);
      throw error;
    }
  }

• src/index.js:37-46 (helper)

  Shared helper to format the API response into MCP-compatible content structure.

  function formatMcpResponse(data) {
    return {
      content: [
        {
          type: "text",
          text: JSON.stringify(data)
        }
      ]
    };
  }