Automation library · AI assistants

OpenAI responses API adapter for LLM and AI agent workflows

Started by someone opening a chat with it. It calls services over plain HTTP rather than through connectors. It hands the judgement calls to OpenAI. 14 steps, 1 branch: a working afternoon to understand properly.

MediumCalls a model: OpenAI

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14 stepsMedium: a working afternoon
1Branch: places the flow splits
0Loops or waits
0Services by connector: it calls them over plain HTTP

The flow

Starts it 6Model 2Logic 4Service 2

The steps in the order they run, from what starts it.

  1. 1When chat message receivedChat triggerStarts it
  2. 2WebhookWebhookStarts it
  3. 3POST ChatCompletionsWebhookStarts it
  4. 4n8n WebhookLm Chat Open AiModel
  5. 5AI AgentAgentModel
  6. 6OpenAI ModelsHttp RequestService
  7. 7Remap to Response API SchemaCodeLogic
  8. 8Models ResponseRespond To WebhookStarts it
  9. 9OpenAI Responses APIHttp RequestService
  10. 10Is Agent?IfLogic
  11. 11Format Stream ResponseCodeLogic
  12. 12Format Completion ResponseCodeLogic
  13. 13Text ResponseRespond To WebhookStarts it
  14. 14JSON ResponseRespond To WebhookStarts it

How it's built

Starts on
Someone opening a chat with it
Steps
14, with 1 branch
Size
Medium: a working afternoon
Connects to
Nothing by connector; it calls services over plain HTTP
Model
OpenAI

Questions

What does it need to run?

An n8n account, and a key for OpenAI. You connect your own accounts after importing it; none are included.

What starts it?

It starts on someone opening a chat with it.

Does it use AI?

Yes. It calls OpenAI. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Plan an afternoon. 14 steps is enough that you should read each one before running it.

How do I import it?

Copy the workflow, open a new workflow in n8n and paste. The steps appear on the canvas, ready for your own accounts.

Before you run it

Nothing here has been tested by us. It is somebody's working automation, read and described from its own steps. Treat the connections it wants as a list of accounts it will touch, and read the 14 steps before you point it at anything that matters.