ChatGPTNextWeb/NextChat · warning · Error

Failed to load preset servers

Error message

Failed to load preset servers

What it means

Thrown at app/components/mcp-market.tsx:99 inside the loadPresetServers useEffect when fetch('https://nextchat.club/mcp/list') resolves with response.ok === false. The preset (marketplace) server list is fetched from a remote host on first mount when MCP is enabled; any non-2xx from nextchat.club triggers this throw (which is then caught and shown as a toast).

Source

Thrown at app/components/mcp-market.tsx:99

    };

    // 立即执行一次
    updateStatuses();
    // 每 1000ms 轮询一次
    const timer = setInterval(updateStatuses, 1000);

    return () => clearInterval(timer);
  }, [mcpEnabled, config]);

  // 加载预设服务器
  useEffect(() => {
    const loadPresetServers = async () => {
      if (!mcpEnabled) return;
      try {
        setLoadingPresets(true);
        const response = await fetch("https://nextchat.club/mcp/list");
        if (!response.ok) {
          throw new Error("Failed to load preset servers");
        }
        const data = await response.json();
        setPresetServers(data?.data ?? []);
      } catch (error) {
        console.error("Failed to load preset servers:", error);
        showToast("Failed to load preset servers");
      } finally {
        setLoadingPresets(false);
      }
    };
    loadPresetServers();
  }, [mcpEnabled]);

  // 加载初始状态
  useEffect(() => {
    const loadInitialState = async () => {
      if (!mcpEnabled) return;
      try {

View on GitHub (pinned to defdcdb55d)

Solutions

1. Confirm outbound HTTPS to https://nextchat.club/mcp/list works from the host (curl it).
2. Treat preset load failure as non-fatal (already caught): the component already shows a toast and keeps presetServers empty, so just ensure the marketplace UI degrades to 'unavailable' gracefully.
3. If deploying offline, host the preset list locally and make the URL configurable instead of hard-coded.
4. Add retry/backoff for transient failures and cache the last good list in localStorage.

Example fix

// before
const response = await fetch("https://nextchat.club/mcp/list");
if (!response.ok) {
  throw new Error("Failed to load preset servers");
}

// after
const PRESET_URL = process.env.NEXTCHAT_PRESET_URL ?? "https://nextchat.club/mcp/list";
let response: Response;
try {
  response = await fetch(PRESET_URL);
} catch (e) {
  setPresetServers([]);
  showToast("Marketplace unreachable");
  return;
}
if (!response.ok) {
  setPresetServers([]);
  showToast(`Marketplace returned ${response.status}`);
  return;
}

async function presetListReachable(): Promise<boolean> {
  try {
    const res = await fetch("https://nextchat.club/mcp/list", { method: "HEAD" });
    return res.ok;
  } catch {
    return false;
  }
}

if (!(await presetListReachable())) {
  setPresetServers([]); // degrade gracefully
}

function isPresetListResponse(
  data: unknown,
): data is { data: unknown[] } {
  return typeof data === "object" && data !== null && Array.isArray((data as any).data);
}

// already handled in-component; ensure the catch keeps the UI usable:
try {
  const response = await fetch("https://nextchat.club/mcp/list");
  if (!response.ok) throw new Error("Failed to load preset servers");
  setPresetServers((await response.json())?.data ?? []);
} catch {
  setPresetServers([]);
  showToast("Marketplace unavailable");
} finally {
  setLoadingPresets(false);
}

When it happens

Trigger: The nextchat.club service is down or returns 5xx; the endpoint path changed (404); a non-2xx is returned due to maintenance, auth, or rate limiting; the client is behind a proxy/firewall that intercepts the request with a non-2xx; an offline/air-gapped deployment that cannot reach nextchat.club.

Common situations: Self-hosted NextChat in an air-gapped or corporate network with no outbound access to nextchat.club; the marketplace service is temporarily unavailable; CDN/WAF in front of nextchat.club blocks the request; user has DNS that resolves but the TLS/network layer returns a non-2xx error page.

Related errors

• Failed to load tools
• Failed to query usage from openai
• Server ${clientId} not found
• Client ${clientId} not found
• Network response was not ok

AI-assisted analysis of ChatGPTNextWeb/NextChat@defdcdb55d (2026-08-12). Data as JSON: /api/errors/15a63896f0cb6d4f. Report an issue: GitHub.