System One
About System One
A universal System One layer for Agents, with an open-source TypeScript SDK and a hosted Jev decision API.
An API service and SDK project
System One gives application developers a shared interface for bounded decisions: classify a request, choose a workflow step, score against a rubric, or estimate whether a condition holds. Applications define the choices and decide what to do with the result.
Hosted Jev today
The hosted API currently provides Jev-compatible choice, score, and noul evaluations. Availability depends on the configured provider and model. The SDK also has separate provider adapters; those adapters do not mean every provider or model is hosted by this service.
API referenceDeveloped in the open
The TypeScript SDK is maintained in a public GitHub repository. Its 0.6 packages separate the decision client, Fetch transport, and provider adapters. Use the System One adapter and your platform API key to connect to this service.
SDK source on GitHubKeep application control
Model output informs a decision; it does not execute a tool or grant permission. Evaluate accuracy with your own data and use review or a reasoning model when uncertainty matters. No response-time, uptime, or individual prediction guarantee is published here.
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