How to get a Jev API key
Getting a Jev API key takes two minutes. You can get it from TypeSafe directly, or start instantly with our hosted Jev API key that works the moment you sign in.
Two ways to get a Jev API key
There are two routes to a working Jev API key. The official route runs through TypeSafe AI, the team that built Jev. The independent route runs through this site, which offers an instant, hosted, metered Jev API key. Both give you the same typed decisions; they differ only in how fast you can start and how you are billed.
The official TypeSafe route
To get an official Jev API key, sign in at console.typesafe.ai and create your key to call the model directly.
- Sign in at console.typesafe.ai and create a key.
- Generate your key in console.typesafe.ai.
- Send requests to POST https://api.typesafe.ai/v1/systemone.
- Authenticate with the header Authorization: Bearer <key>.
- Official SDKs read the key from the TYPESAFE_API_KEY environment variable.
The instant hosted route
If you do not want to wait, this site issues a hosted Jev API key instantly. Sign in, add a small prepaid balance on the pricing page, and you receive a jv_live_ key you can use right away. Your hosted Jev API key works against our metered Decision API, so you get the same choice, score, and noul decisions without any approval step.
How to authenticate and store your key
Whichever Jev API key you use, keep it secret. Never commit a key to git or paste it publicly. Store your Jev API key in an environment variable and read it at runtime.
With the hosted key, send requests to POST https://jevtypesafeai.com/api/v1/decide and set the header Authorization: Bearer jv_live_ followed by your key.
What a Jev API key costs
Jev is priced per input token, and output is free. On the hosted route you prepay a small balance and are billed at $0.42 per million input tokens — about $0.001 per decision — with output free, so a single Jev API key can cover thousands of calibrated decisions for a few cents.
Jev sign up — the fastest path to a key
If you searched "Jev sign up", the hosted route is what you want: sign in with an email, add a small prepaid balance, and a jv_live_ key is issued instantly — no waitlist, no approval, no sales call. You don't even need to sign up to try it first: the browser playground runs real calibrated decisions for free, so you can confirm Jev fits before you create a key. Sign up when you want a key of your own for code.
Ready to start? Grab a hosted Jev API key on the pricing page and make your first call today.
See also: Pricing · Get Jev · Jev on OpenRouter · How to use the API
Related: Jev access · System One model · Diogo Almeida
Get your Jev API key now
Instant access. Sign in, prepay a small balance, and get a hosted jv_live_ key in minutes.