feat(Perplexity Node): New node (#13604)

packages/nodes-base/credentials/PerplexityApi.credentials.ts

@@ -0,0 +1,52 @@
+import type {
+	IAuthenticateGeneric,
+	ICredentialTestRequest,
+	ICredentialType,
+	INodeProperties,
+} from 'n8n-workflow';
+
+export class PerplexityApi implements ICredentialType {
+	name = 'perplexityApi';
+
+	displayName = 'Perplexity API';
+
+	documentationUrl = 'https://docs.perplexity.ai';
+
+	properties: INodeProperties[] = [
+		{
+			displayName: 'API Key',
+			name: 'apiKey',
+			type: 'string',
+			typeOptions: { password: true },
+			required: true,
+			default: '',
+			description: 'Your Perplexity API key. Get it from your Perplexity account.',
+		},
+	];
+
+	authenticate: IAuthenticateGeneric = {
+		type: 'generic',
+		properties: {
+			headers: {
+				Authorization: '=Bearer {{$credentials.apiKey}}',
+			},
+		},
+	};
+
+	test: ICredentialTestRequest = {
+		request: {
+			baseURL: 'https://api.perplexity.ai',
+			url: '/chat/completions',
+			method: 'POST',
+			body: {
+				model: 'r1-1776',
+				messages: [{ role: 'user', content: 'test' }],
+			},
+			headers: {
+				Authorization: '=Bearer {{$credentials.apiKey}}',
+				'Content-Type': 'application/json',
+			},
+			json: true,
+		},
+	};
+}