1823aae891Co-authored-by: Matt <77928207+mattzcarey@users.noreply.github.com> Co-authored-by: Konstantin Konstantinov <KKonstantinov@users.noreply.github.com> Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
55 lines
2 KiB
JavaScript
55 lines
2 KiB
JavaScript
#!/usr/bin/env node
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/**
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* Example demonstrating the minimal AuthProvider for bearer token authentication.
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*
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* AuthProvider is the base interface for all client auth. For simple cases where
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* tokens are managed externally — pre-configured API tokens, gateway/proxy patterns,
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* or tokens obtained through a separate auth flow — implement only `token()`.
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*
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* For OAuth flows (client_credentials, private_key_jwt, etc.), use the built-in
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* providers which implement both `token()` and `onUnauthorized()`.
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*
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* Environment variables:
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* MCP_SERVER_URL - Server URL (default: http://127.0.0.1:3000/mcp)
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* MCP_TOKEN - Bearer token to use for authentication (required)
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*/
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import type { AuthProvider } from '@modelcontextprotocol/client';
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import { Client, StreamableHTTPClientTransport } from '@modelcontextprotocol/client';
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const DEFAULT_SERVER_URL = process.env.MCP_SERVER_URL || 'http://127.0.0.1:3000/mcp';
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async function main() {
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const token = process.env.MCP_TOKEN;
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if (!token) {
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console.error('MCP_TOKEN environment variable is required');
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process.exit(1);
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}
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// AuthProvider with just token() — the simplest possible auth.
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// token() is called before every request, so it can handle refresh internally.
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// With no onUnauthorized(), a 401 throws UnauthorizedError immediately.
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const authProvider: AuthProvider = {
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token: async () => token
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};
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const client = new Client({ name: 'auth-provider-example', version: '1.0.0' }, { capabilities: {} });
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const transport = new StreamableHTTPClientTransport(new URL(DEFAULT_SERVER_URL), { authProvider });
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await client.connect(transport);
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console.log('Connected successfully.');
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const tools = await client.listTools();
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console.log('Available tools:', tools.tools.map(t => t.name).join(', ') || '(none)');
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await transport.close();
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}
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try {
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await main();
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} catch (error) {
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console.error('Error running client:', error);
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process.exitCode = 1;
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}
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