first commit

packages/@n8n/nodes-langchain/nodes/mcp/McpClientTool/loadOptions.ts

@@ -0,0 +1,45 @@
+import { type ILoadOptionsFunctions, type INodePropertyOptions } from 'n8n-workflow';
+
+import type { McpAuthenticationOption, McpServerTransport } from '../shared/types';
+import {
+	connectMcpClient,
+	getAllTools,
+	getAuthHeaders,
+	mapToNodeOperationError,
+	tryRefreshOAuth2Token,
+} from '../shared/utils';
+
+export async function getTools(this: ILoadOptionsFunctions): Promise<INodePropertyOptions[]> {
+	const authentication = this.getNodeParameter('authentication') as McpAuthenticationOption;
+	const node = this.getNode();
+	let serverTransport: McpServerTransport;
+	let endpointUrl: string;
+	if (node.typeVersion === 1) {
+		serverTransport = 'sse';
+		endpointUrl = this.getNodeParameter('sseEndpoint') as string;
+	} else {
+		serverTransport = this.getNodeParameter('serverTransport') as McpServerTransport;
+		endpointUrl = this.getNodeParameter('endpointUrl') as string;
+	}
+	const { headers } = await getAuthHeaders(this, authentication);
+	const client = await connectMcpClient({
+		serverTransport,
+		endpointUrl,
+		headers,
+		name: node.type,
+		version: node.typeVersion,
+		onUnauthorized: async (headers) => await tryRefreshOAuth2Token(this, authentication, headers),
+	});
+
+	if (!client.ok) {
+		throw mapToNodeOperationError(node, client.error);
+	}
+
+	const tools = await getAllTools(client.result);
+	return tools.map((tool) => ({
+		name: tool.name,
+		value: tool.name,
+		description: tool.description,
+		inputSchema: tool.inputSchema,
+	}));
+}