Try Jev. Use it in TypeScript.
A tiny library for Jev, TypeSafe’s evaluation model.
Change the text. Ask a question. Get a decision.
No account or API key needed.
Runs on TypeSafe’s Jev via Vercel. Your text is sent to the model.
Use this in TypeScript
Install the library, then set AI_GATEWAY_API_KEY on your server.
npm install sysone-helpimport { createSysone } from "sysone-help";
import { vercel } from "sysone-help/providers/vercel";
// Set AI_GATEWAY_API_KEY in your server environment.
const sys = createSysone({
provider: vercel(),
model: "typesafe-ai/jev",
});
const input = "Could you send me the updated proposal before our meeting tomorrow?";
const result = await sys.check(input, "Does this message need a reply?", {
minProbability: 0.80,
});
console.log(result.decision); // "yes", "no" or "uncertain"
console.log(result.probability);Zero dependencies · 3.9 kB gzipMIT · Open source
Playground data & limits
The public playground runs Jev through Vercel AI Gateway using a server-side key. Text is sent to Vercel and TypeSafe. The app does not persist input or results; infrastructure and provider retention policies apply. Requests are limited to 6,000 input characters, one question, and 20 requests/minute/IP. This is an independent project.