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Independent commercial planeDeterministic API

Drop-in OpenAI replacement. Cheaper. Guaranteed valid JSON.

Keep your SDK. Change one base_url. Multi-model routing with schema and tool-call checks before every response leaves the API. $100 starter credits on signup.

Get API key Docs Adapt for your site

Refer a friend → you both get +$100 API credit

One-line swap

Same OpenAI request shape. Only the host and key change. Machine catalog at /catalog.json.

# Before
OPENAI_BASE_URL=https://api.openai.com/v1

# After
OPENAI_BASE_URL=https://nf-deterministic-api-v1-staging.sina-kazemnezhad-ca.workers.dev/v1
OPENAI_API_KEY=sk-nf-<your-key>

What you get

Not a model. Not an agent platform. A drop-in API that returns usable structured results.

Guaranteed JSON

Schema and tool-call validation before the response leaves. Auto-repair on failure.

Multi-model

Cheap-first routing under the hood. You keep one OpenAI-compatible surface.

$100 to start

Instant key. Metered credits. Refer a friend — both sides get +$100.

Sister sites learn here

Noetfield, Trustfield, SourceA, and SourceB implement against this catalog — they do not invent a parallel OpenAI-proxy SKU.

SourceB

Primary delivery UI. Link Get API key here or call signup with caller_site: sourceb.app.

Noetfield

Corporate narrative may mention cost control; sell this API plane, not Motor/Runways, as the buyer SKU.

Trustfield

Trust framing on the same product_id and flagship path — no forked promises.

SourceA

Study the contract for Operating Brain plans; do not duplicate this commercial drop-in SKU.

Open adapt playbook

Get API key

Instant key + $100 starter credits. Shown once — copy it now.