Automation library · AI assistants

Create universal OpenAI-compatible API endpoints

Started by someone opening a chat with it. It calls services over plain HTTP rather than through connectors. It puts OpenAI behind a retrieval step, so answers are drawn from documents you supply rather than from the model alone. 18 steps, 1 branch: a working afternoon to understand properly.

MediumCalls a model: OpenAIRetrieval

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18 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 3Logic 6Service 3

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

  1. 1GET modelsWebhookStarts it
  2. 2POST ChatCompletionsWebhookStarts it
  3. 3n8n WebhooksLm Chat Open AiModel
  4. 4When chat message receivedChat triggerStarts it
  5. 5Simple MemoryMemory Buffer WindowModel
  6. 6Get many workflowsN8nService
  7. 7Remap to Response API SchemaCodeLogic
  8. 8Powered By n8n Workflow ModelsAgentModel
  9. 9Edit FieldsSetLogic
  10. 10Is Stream?IfLogic
  11. 11AggregateAggregateLogic
  12. 12Call workflow webhookHttp RequestService
  13. 13Call workflow webhook1Http RequestService
  14. 14Models ResponseRespond To WebhookStarts it
  15. 15Format Stream ResponseCodeLogic
  16. 16Format Completion ResponseCodeLogic
  17. 17Text ResponseRespond To WebhookStarts it
  18. 18JSON ResponseRespond To WebhookStarts it

How it's built

Starts on
Someone opening a chat with it
Steps
18, with 1 branch
Size
Medium: a working afternoon
Connects to
Nothing by connector; it calls services over plain HTTP
Model
OpenAI
Retrieval
Answers are drawn from documents you supply, not from the model alone

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. Its answers draw on documents you give it, not on the model alone. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Plan an afternoon. 18 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 18 steps before you point it at anything that matters.