continuedev/continue · error · Error

No MCP authorization code found for ${serverUrl}

Error message

No MCP authorization code found for ${serverUrl}

What it means

Non-2xx from the Codestral FIM rawPredict endpoint on Vertex. Unlike the chat paths, only status/statusText are included — no response body — which makes diagnosis harder since Google's detailed error JSON is dropped.

Source

Thrown at core/context/mcp/MCPOauth.ts:306

    const contexts = Array.from(authenticatingContexts.entries());
    if (contexts.length === 1) {
      [serverUrl, context] = contexts[0];
    }
  }

  if (!context || !serverUrl) {
    console.error("No matching authenticating context found for state:", state);
    return;
  }

  const { ide, serverId } = context;

  try {
    if (!serverUrl) {
      throw new Error("No MCP server url found for authentication");
    }
    if (!authorizationCode) {
      throw new Error(`No MCP authorization code found for ${serverUrl}`);
    }

    // Close the server before processing auth
    if (serverInstance) {
      await new Promise<void>((resolve) => {
        serverInstance!.close(() => {
          console.debug("Server for MCP Oauth process was closed");
          serverInstance = null;
          resolve();
        });
      });
    }

    const authProvider = new MCPConnectionOauthProvider(serverUrl, ide);
    await authProvider.ensureRedirectUrl();
    const authStatus = await auth(authProvider, {
      serverUrl,
      authorizationCode,

View on GitHub (pinned to 5522c6f44c)

Solutions

1. Reproduce the same body with curl using a fresh token to capture the response body Google returns
2. Check quota and model enablement for codestral in the project/region
3. Wrap fimStream calls in retry with backoff for 429/5xx
4. Consider patching the adapter to include await response.text() in the message for better diagnostics

try { for await (const c of api.fimStream(body, signal)) {} } catch (e) { const m = (e as Error).message; if (/429|5\d\d/.test(m)) await retryWithBackoff(); else throw e; }

When it happens

Trigger: Auth/quota/project issues on the FIM request: expired token, missing aiplatform.user role, model not deployed/enabled, 429 rate limit.

Common situations: FIM works then starts failing after token expiry; Codestral not enabled in Model Garden for the project; sustained IDE autocomplete traffic hitting quota.

Related errors

• No MCP server url found for authentication
• Unsupported transport type: ${this.options.type}
• Error getting prompt: MCP Connection ${serverName} not found
• Failed to fetch messages: ${response.statusText}
• URL is not defined in params

AI-assisted analysis of continuedev/continue@5522c6f44c (2026-08-27). Data as JSON: /api/errors/3cd9543c65e2dfad. Report an issue: GitHub.