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Overview

Prompt flow’s OpenAI connection supports a custom base_url. Set it to TokenLab’s /v1 endpoint and use TokenLab model IDs in your flow.
Type: Flow builder and evaluation platformPrimary Path: OpenAI-compatible Chat CompletionsSupport Confidence: Supported OpenAI-compatible path

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Create A Connection

pf connection create \
  --file ./my_chatbot/openai.yaml \
  --set api_key=sk-your-tokenlab-key base_url=https://api.tokenlab.sh/v1 \
  --name open_ai_connection

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Flow Notes

In your flow.dag.yaml, keep the connection name aligned with the command above: 
connection: open_ai_connection
deployment_name: claude-sonnet-5
Some Prompt flow templates call this value deployment_name because the same templates also support Azure OpenAI deployments. With TokenLab, use the TokenLab model ID.

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Endpoint Notes

This integration uses Prompt flow’s OpenAI-compatible connection. Native TokenLab Responses, Anthropic Messages, and Gemini routes require Prompt flow tools or custom Python nodes that call those endpoints directly.