list_assets

Instructions

Implementation Reference

• src/index.ts:291-305 (registration)

  Registration of the 'list_assets' tool on the MCP server, with schema definition (useToonFormat, crossMarketOnly) and handler that calls /assets API endpoint.

  if (shouldRegister("list_assets")) server.registerTool(
    "list_assets",
    {
      description: "Directory of every canonical asset that trades on Hyperliquid or any builder dex, grouped by economic exposure (not by venue ticker). Each asset entry lists its synonyms (e.g. PAXG is a synonym of GOLD), which venues it trades on, aggregated open interest, and a cross-market flag (listed on 2+ venues). Prefer this over list_markets when the user asks 'what assets are available?', 'which venues is GOLD on?', or 'show me cross-market assets'.",
      inputSchema: {
        useToonFormat: useToonFormatSchema,
        crossMarketOnly: z.boolean().optional().describe("If true, return only assets listed on 2+ venues. Default: false (return all)."),
      },
    },
    async ({ useToonFormat, crossMarketOnly }) => {
      const params: Record<string, string> = {};
      if (crossMarketOnly) params.crossMarketOnly = 'true';
      return toolResult(await callAPI(useToonFormat, "/assets", params));
    }
  );

• src/index.ts:300-304 (handler)

  Handler function for list_assets: accepts useToonFormat and crossMarketOnly, builds params, and calls the /assets API endpoint via callAPI helper.

  async ({ useToonFormat, crossMarketOnly }) => {
    const params: Record<string, string> = {};
    if (crossMarketOnly) params.crossMarketOnly = 'true';
    return toolResult(await callAPI(useToonFormat, "/assets", params));
  }

• src/index.ts:295-298 (schema)

  Input schema for list_assets: accepts optional useToonFormat (default true) and optional crossMarketOnly boolean.

  inputSchema: {
    useToonFormat: useToonFormatSchema,
    crossMarketOnly: z.boolean().optional().describe("If true, return only assets listed on 2+ venues. Default: false (return all)."),
  },

• src/index.ts:94-166 (helper)

  The callAPI helper used by list_assets handler to make HTTP requests with timeout, retries, and error handling.

  async function callAPI(useToon: boolean, path: string, params?: Record<string, string>): Promise<any> {
    const url = new URL(`${BASE}${path}`);
    if (params) {
      Object.entries(params).forEach(([key, value]) => {
        if (value !== undefined && value !== "") {
          url.searchParams.set(key, value);
        }
      });
    }
  
    let lastError: Error | null = null;
  
    for (let attempt = 0; attempt <= MAX_RETRIES; attempt++) {
      try {
        const controller = new AbortController();
        const timeout = setTimeout(() => controller.abort(), REQUEST_TIMEOUT_MS);
  
        const headers: Record<string, string> = {};
        if (API_KEY) headers["X-API-Key"] = API_KEY;
  
        const response = await fetch(url.toString(), {
          headers,
          signal: controller.signal,
        });
  
        clearTimeout(timeout);
  
        if (response.status === 429) {
          // Rate limited — retry after delay
          if (attempt < MAX_RETRIES) {
            await new Promise((r) => setTimeout(r, RETRY_DELAY_MS * (attempt + 1)));
            continue;
          }
          throw new Error("Rate limit exceeded. Please wait a moment and try again.");
        }
  
        if (response.status === 404) {
          throw new Error("Not found. The requested resource does not exist — check the address or symbol.");
        }
  
        if (response.status === 401) {
          throw new Error("Invalid API key. Check your COINVERSAA_API_KEY environment variable.");
        }
  
        if (!response.ok) {
          const body = await response.json().catch(() => null);
          const msg = body?.error || response.statusText;
          throw new Error(`Request failed (${response.status}): ${msg}`);
        }
  
        const data = await response.json();
        return useToon ? toonEncode(data) : data;
      } catch (err: any) {
        if (err.name === "AbortError") {
          lastError = new Error("Request timed out after 30 seconds. The server may be under heavy load — try again.");
        } else if (err.cause?.code === "ECONNREFUSED" || err.cause?.code === "ENOTFOUND") {
          lastError = new Error("Cannot connect to the Coinversa API. Check your COINVERSAA_API_URL setting and network connection.");
        } else {
          lastError = err;
        }
  
        // Retry on transient network errors
        if (attempt < MAX_RETRIES && (err.name === "AbortError" || err.cause?.code === "ECONNRESET")) {
          await new Promise((r) => setTimeout(r, RETRY_DELAY_MS * (attempt + 1)));
          continue;
        }
  
        throw lastError;
      }
    }
  
    throw lastError || new Error("Request failed after retries");
  }

• src/index.ts:172-174 (helper)

  The toolResult helper used by list_assets to format the API response into MCP content.

  function toolResult(data: any) {
    return { content: [{ type: "text" as const, text: formatJSON(data) }] };
  }