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Settings

Model providers

The key or endpoint a run's model calls go to.

Provider Setting Endpoint
TypeSafe AI TYPESAFE_API_KEY System One judgement only
OpenAI OPENAI_API_KEY api.openai.com
OpenRouter OPENROUTER_API_KEY https://openrouter.ai/api/v1, fixed
Anthropic ANTHROPIC_API_KEY Standard runs only, through the relay
Local or self-hosted MODEL_API_URL, optional MODEL_API_KEY An OpenAI-compatible endpoint, API path included

Configure a provider

  1. Settings → Model providers → + Add: choose a company from the searchable catalogue, then enter its key or endpoint. Fields save automatically.
  2. Configured providers appear in a compact list. Edit opens their connection fields; Done returns to the list.
  3. In the builder's Model step, choose the provider, then search its model list or enter an exact model ID. See model selection.

A local endpoint

Use the Settings page to save these values, or merge the shown properties into your existing settings.json (location and precedence).

settings.json · local endpoint
{
  "MODEL_API_URL": "http://127.0.0.1:8000/v1",
  "MODEL_API_KEY": ""
}
Rule
No key Leave it empty; Nullius sends the placeholder local
Reachable from The calling machine; loopback on a run host is that host's

Where credentials go
A run Its provider's key and endpoint, as environment, never written
A recipe, a log Nothing; logs are redacted
A standard run on Anthropic The relay alone