# OpenAI Responses API proxy for n8n with LLM node and LangChain compatibility
This workflow bridges the gap between OpenAI´s new Responses API and existing LLM nodes in n8n, enabling seamless integration without rewriting agent logic. Ideal for developers and automation engineers who need to adopt advanced OpenAI features like multimodality while maintaining backward compatibility with LangChain-based flows.
## Who it´s for
- Developers using n8n for OpenAI integrations
- Automators needing to maintain legacy LLM nodes with new APIs
- Teams adopting multimodal models before official n8n support
## What the automation does
- Receives incoming requests via HTTP webhook in OpenAI chat completion format
- Transforms input into the OpenAI Responses API schema
- Forwards the request to OpenAI and retrieves the response
- Re-maps the response back to standard OpenAI-compatible format
- Supports both streamed and standard data transmission
- Enables transparent API replacement without altering existing workflows
## What´s included
- Ready-to-use workflow for n8n
- Trigger and handler logic based on webhook
- Integrations with OpenAI and n8n Webhook
- Basic textual instructions for launch and adaptation
## Requirements for setup
- n8n account (cloud or self-hosted)
- OpenAI API key
- Access to environment variables and HTTP nodes in n8n
## Benefits and outcomes
- Use new OpenAI capabilities (e.g., GPT-4o-mini) without reworking agents
- Maintain functionality of existing LLM nodes in n8n
- Simplified migration to new APIs
- Support for multimodal use cases before official n8n release
- Save time on manual adaptation of multiple workflows
- Safe testing of new models in production environments
## Important: template only
Important: you are purchasing a ready-made automation workflow template only. Rollout into your infrastructure, connecting specific accounts and services, 1:1 setup help, custom adjustments for non-standard stacks and any consulting support are provided as a separate paid service at an individual rate. To discuss custom work or 1:1 help, contact via chat
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