first commit

packages/@n8n/nodes-langchain/credentials/LemonadeApi.credentials.ts

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+import type {
+	ICredentialTestRequest,
+	ICredentialType,
+	INodeProperties,
+	IHttpRequestOptions,
+	ICredentialDataDecryptedObject,
+} from 'n8n-workflow';
+
+export type LemonadeApiCredentialsType = {
+	baseUrl: string;
+	apiKey?: string;
+};
+
+export class LemonadeApi implements ICredentialType {
+	name = 'lemonadeApi';
+
+	displayName = 'Lemonade';
+
+	documentationUrl = 'lemonade';
+
+	properties: INodeProperties[] = [
+		{
+			displayName: 'Base URL',
+			name: 'baseUrl',
+			required: true,
+			type: 'string',
+			default: 'http://localhost:8000/api/v1',
+		},
+		{
+			displayName: 'API Key',
+			hint: 'Optional API key for Lemonade server authentication. Not required for default Lemonade installation',
+			name: 'apiKey',
+			type: 'string',
+			typeOptions: { password: true },
+			default: '',
+			required: false,
+		},
+	];
+
+	async authenticate(
+		credentials: ICredentialDataDecryptedObject,
+		requestOptions: IHttpRequestOptions,
+	): Promise<IHttpRequestOptions> {
+		// Only add Authorization header if API key is provided and not empty
+		const apiKey = credentials.apiKey as string | undefined;
+		if (apiKey && apiKey.trim() !== '') {
+			requestOptions.headers = {
+				...requestOptions.headers,
+				Authorization: `Bearer ${apiKey}`,
+			};
+		}
+		return requestOptions;
+	}
+
+	test: ICredentialTestRequest = {
+		request: {
+			baseURL: '={{ $credentials.baseUrl }}',
+			url: '/models',
+			method: 'GET',
+		},
+	};
+}