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Portkey AI integration

Portkey is an AI observability suite that includes prompt management capabilities.

To reference prompts in Portkey:

  1. Set the PORTKEY_API_KEY environment variable.

  2. Use the portkey:// prefix for your prompts, followed by the Portkey prompt ID. For example:

    prompts:
      - 'portkey://pp-test-promp-669f48'

    providers:
      - openai:gpt-5

    tests:
      - vars:
          topic: ...

Variables from your promptfoo test cases will be automatically plugged into the Portkey prompt as variables. The resulting prompt will be rendered and returned to promptfoo, and used as the prompt for the test case.

Note that promptfoo does not follow the temperature, model, and other parameters set in Portkey. You must set them in the providers configuration yourself.

Using Portkey gateway​

The Portkey AI gateway is directly supported by promptfoo. See also:

Example:

providers:
  id: portkey:gpt-5
  config:
    portkeyProvider: openai

More complex portkey configurations are also supported.

providers:
  id: portkey:gpt-5
  config:
    # Can alternatively set environment variable, e.g. PORTKEY_API_KEY
    portkeyApiKey: xxx

    # Other configuration options
    portkeyVirtualKey: xxx
    portkeyMetadata:
      team: xxx
    portkeyConfig: xxx
    portkeyProvider: xxx
    portkeyApiBaseUrl: xxx