feat(Vercel AI Gateway Node): Add Vercel AI Gateway model Node (#17524)

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

@@ -0,0 +1,63 @@
+import type {
+	IAuthenticateGeneric,
+	ICredentialTestRequest,
+	ICredentialType,
+	INodeProperties,
+} from 'n8n-workflow';
+
+export class VercelAiGatewayApi implements ICredentialType {
+	name = 'vercelAiGatewayApi';
+
+	displayName = 'Vercel AI Gateway';
+
+	documentationUrl = 'vercelaigateway';
+
+	properties: INodeProperties[] = [
+		{
+			displayName: 'API Key or OIDC Token',
+			name: 'apiKey',
+			type: 'string',
+			typeOptions: { password: true },
+			required: true,
+			default: '',
+			description: 'Your credentials for the Vercel AI Gateway',
+		},
+		{
+			displayName: 'Base URL',
+			name: 'url',
+			type: 'string',
+			required: true,
+			default: 'https://ai-gateway.vercel.sh/v1',
+			description: 'The base URL for your Vercel AI Gateway instance',
+			placeholder: 'https://ai-gateway.vercel.sh/v1',
+		},
+	];
+
+	authenticate: IAuthenticateGeneric = {
+		type: 'generic',
+		properties: {
+			headers: {
+				Authorization: '=Bearer {{$credentials.apiKey}}',
+				'http-referer': 'https://n8n.io/',
+				'x-title': 'n8n',
+			},
+		},
+	};
+
+	test: ICredentialTestRequest = {
+		request: {
+			baseURL: '={{ $credentials.url }}',
+			url: '/chat/completions',
+			method: 'POST',
+			headers: {
+				'http-referer': 'https://n8n.io/',
+				'x-title': 'n8n',
+			},
+			body: {
+				model: 'openai/gpt-4.1-nano',
+				messages: [{ role: 'user', content: 'test' }],
+				max_tokens: 1,
+			},
+		},
+	};
+}