feat: Add HTTP proxy for supported LLM nodes (#15449)

packages/@n8n/nodes-langchain/nodes/llms/LMChatAnthropic/LmChatAnthropic.node.ts

@@ -12,6 +12,7 @@ import {
 	type SupplyData,
 } from 'n8n-workflow';
 
+import { getHttpProxyAgent } from '@utils/httpProxyAgent';
 import { getConnectionHintNoticeField } from '@utils/sharedFields';
 
 import { searchModels } from './methods/searchModels';
@@ -329,6 +330,9 @@ export class LmChatAnthropic implements INodeType {
 			callbacks: [new N8nLlmTracing(this, { tokensUsageParser })],
 			onFailedAttempt: makeN8nLlmFailedAttemptHandler(this),
 			invocationKwargs,
+			clientOptions: {
+				httpAgent: getHttpProxyAgent(),
+			},
 		});
 
 		return {