Method refreshMcp

src/main/lib/credential-manager.ts:710–754

* Refresh MCP OAuth token

(
    source: LoadedSource,
    cred: StoredCredential
  )

   * Refresh MCP OAuth token
   */
  private async refreshMcp(
    source: LoadedSource,
    cred: StoredCredential
  ): Promise<string | null> {
    if (!cred.clientId) {
      debug(`[SourceCredentialManager] No clientId for MCP token refresh`);
      this.markSourceNeedsReauth(source, 'Missing clientId for token refresh');
      return null;
    }

    try {
      // Only HTTP/SSE transport can refresh tokens - stdio doesn't use OAuth
      if (!source.config.mcp?.url) {
        // This is expected for stdio transport - not an error
        debug(`[SourceCredentialManager] No URL for MCP token refresh (stdio transport)`);
        return null;
      }

      const oauth = new CraftOAuth(
        { mcpBaseUrl: getMcpBaseUrl(source.config.mcp.url) },
        {
          onStatus: () => {},
          onError: () => {},
        }
      );

      const tokens = await oauth.refreshAccessToken(cred.refreshToken!, cred.clientId);

      // Update stored credentials
      await this.save(source, {
        ...cred,
        value: tokens.accessToken,
        refreshToken: tokens.refreshToken || cred.refreshToken,
        expiresAt: tokens.expiresAt,
      });

      debug(`[SourceCredentialManager] Refreshed MCP token for ${source.config.slug}`);
      return tokens.accessToken;
    } catch (error) {
      const errorMsg = error instanceof Error ? error.message : String(error);
      debug(`[SourceCredentialManager] MCP token refresh failed:`, error);
      this.markSourceNeedsReauth(source, `Token refresh failed: ${errorMsg}`);
      return null;
    }
  }
}

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