Types & Errors

import type {
  McpConnectionState,
  McpConnectionEvent,
} from '@mcp-ts/sdk/shared';

type McpConnectionState =
  | 'DISCONNECTED'
  | 'CONNECTING'
  | 'AUTHENTICATING'
  | 'AUTHENTICATED'
  | 'DISCOVERING'
  | 'CONNECTED'
  | 'VALIDATING'
  | 'RECONNECTING'
  | 'FAILED';

type McpConnectionEvent =
  | { type: 'state_changed'; sessionId: string; state: McpConnectionState; /* ... */ }
  | { type: 'tools_discovered'; sessionId: string; tools: Tool[]; /* ... */ }
  | { type: 'auth_required'; sessionId: string; authUrl: string; /* ... */ }
  | { type: 'error'; sessionId: string; error: string; /* ... */ }
  | { type: 'disconnected'; sessionId: string; reason?: string; /* ... */ }
  | { type: 'progress'; sessionId: string; message: string; /* ... */ };

import type { ToolInfo } from '@mcp-ts/sdk/shared';

interface ToolInfo {
  name: string;
  description?: string;
  inputSchema: {
    type: 'object';
    properties?: Record<string, any>;
    required?: string[];
  };
}

interface SessionData {
  sessionId: string;
  identity?: string;
  serverId?: string;
  serverName?: string;
  serverUrl: string;
  callbackUrl: string;
  transportType: 'sse' | 'streamable_http';
  active: boolean;
  createdAt: number;
  headers?: Record<string, string>;
  // OAuth data
  tokens?: OAuthTokens;
  clientInformation?: OAuthClientInformation;
  codeVerifier?: string;
  clientId?: string;
}

import { UnauthorizedError } from '@mcp-ts/sdk/server';

try {
  await client.connect();
} catch (error) {
  if (error instanceof UnauthorizedError) {
    console.log('Redirect to:', error.authUrl);
  }
}