HTTP API reference
TypeSafe's official reference for the POST /v1/systemone request and response contract used by Jev.
This summary is based on how curated lists describe the project; its README was not available to review.
Overview
This is TypeSafe's HTTP API reference page for Jev. It documents the request and response contract for POST /v1/systemone, the single endpoint where a client sends unstructured state together with typed questions and receives a probability for each allowed answer.
It is the primary reference for anyone writing a client, SDK or integration rather than using an existing one. The listing only summarises it as the request and response contract, so specifics such as field names, limits, error codes and versioning should be read directly on docs.typesafe.ai.
What the decision model decides
| Type | Question | Answers |
|---|---|---|
| Other | Documents how Choice, Score and Noul questions are encoded and answered over HTTP(inferred) | — |
How it works
- Read the request schema for state and questions
- Send POST /v1/systemone with an API key
- Parse per-answer probabilities from the response
Strengths
- Authoritative contract for building clients in any language
- Single endpoint keeps integrations simple
Caveats
- Documentation only; details must be read on the site
- Using the endpoint requires a TypeSafe account and key
At a glance
- Type
- Article
- Status
- production
- Runtime
- HTTP API
- Has code
- no
Use cases and integrations
How curated lists describe it
Request and response contract for POST /v1/systemone.
hellogumbo/awesome-jev
Frequently asked questions
What does this page cover?
The request and response format for POST /v1/systemone, Jev's decision endpoint.
Who should read it?
Anyone writing their own client, SDK or integration for Jev.
Do I need a key to call the endpoint?
Yes, calls require a TypeSafe API key.
Related projects
Server behind api.typesafe.pro, a free anonymous System One-compatible endpoint that forwards to TypeSafe on the operator's key.
ServiceproductionBrowser form for building Jev requests from pasted text without hand-writing JSON, then rerunning to see how steady the answers are.
ProjectbetaJavaScriptTerminal REPL for shaping System One requests before writing code, with lessons, a sketch editor, conversation turns and offline simulation.
ServicebetaTypeScriptNushell module for TypeSafe's System One API: pipe content in, ask noul, choice and score questions, and filter on the numbers.
ServicebetaNushellOne-page playground and test bench for Jev with TypeSafe, OpenRouter, LLM-baseline and mock backends behind one /v1/systemone contract.
ServiceprototypeTypeScriptStatic browser interface for making structured Jev decisions through the Pollinations API, with multilingual READMEs.
ServiceprototypeJavaScript