Generate HTTP API requests from natural language with GPT-4.1 Mini
Ready for 3.0Ready for 3.0. This template uses no nodes that n8n 3.0 removes. No removed nodes, versions or helpers found. Static check, last run 2026-10-19.
What this workflow does
This AI workflow has 6 nodes and runs manually, when you click “Execute workflow”. Along the way it connects OpenAI Chat Model and HTTP Request.
How it runs
Trigger: Manually, when you click “Execute workflow”.
- Set User Request Field (Edit Fields (Set)): sets 1 field: user_request
- AI Request Planning Agent (AI Agent): runs an AI agent, with model: OpenAI GPT-4.1 Mini; 1 tool (Execute HTTP Request)
Services it uses
Before you upgrade to n8n 3.0
Nothing in this workflow is removed in n8n 3.0, so it should import and run after the upgrade.
Nodes used (6)
- Manual Trigger
n8n-nodes-base.manualTrigger - AI Agent
@n8n/n8n-nodes-langchain.agent - OpenAI Chat Model
@n8n/n8n-nodes-langchain.lmChatOpenAi - Http Request Tool
n8n-nodes-base.httpRequestTool - No Operation, do nothing
n8n-nodes-base.noOp - Edit Fields (Set)
n8n-nodes-base.set
From the author
Quick overview This n8n workflow turns plain-English requests into live HTTP API calls. An AI agent (GPT-4.1 Mini) reads your request, decides the method, URL, headers, query parameters, and body, then executes it via the HTTP request tool and returns the…