Helicone

Helicone is an AI gateway that routes requests to models from OpenAI, Anthropic, Google, Meta, Mistral, and other providers through a single OpenAI-compatible endpoint, with built-in request logging and usage analytics.

Get an API key

Create an account at helicone.ai and generate a key from Settings → API Keys. Add it to your .env file:

HELICONE_KEY=your-api-key

Make sure your account has credits, otherwise model requests will fail.

Configuration

Add the endpoint to the custom list under endpoints in your librechat.yaml. If your file already has an endpoints.custom list, paste only the - name: entry into it, keeping the same indentation:

endpoints:
  custom:
    - name: "Helicone"
      apiKey: "${HELICONE_KEY}"
      baseURL: "https://ai-gateway.helicone.ai"
      headers:
        x-librechat-body-parentmessageid: "{{LIBRECHAT_BODY_PARENTMESSAGEID}}"
      models:
        default: ["gpt-4o-mini", "claude-4.5-sonnet", "llama-3.1-8b-instruct", "gemini-2.5-flash-lite"]
        fetch: true
      titleConvo: true
      titleModel: "gpt-4o-mini"
      modelDisplayLabel: "Helicone"
      iconURL: "https://marketing-assets-helicone.s3.us-west-2.amazonaws.com/helicone.png"

Notes

• With fetch: true, LibreChat loads the full model list from Helicone, so the default array is only the initial selection. Browse everything available in the Helicone model library.
• The x-librechat-body-parentmessageid header passes each request's parent message ID to Helicone so logs can be grouped by conversation.
• Set rate limits, caching policies, and review usage from the Helicone dashboard.