# System One API

> Hosted decision layer for AI agents — Choice, Score, and Noul for tool routing, ranking, and gated checks.

- Website: https://system-one.dev/en/api
- AZN8 listing: https://azn8.com/listing/system-one-api
- Pricing: OSS SDK + hosted API · Freemium
- Categories: [AI](https://azn8.com/category/ai), [Developer tools](https://azn8.com/category/developer-tools), [SaaS](https://azn8.com/category/saas)
- Listed: 2026-10-23
- Updated: 2026-10-23
- JSON: https://azn8.com/api/v1/listings/system-one-api

## About

Hosted decision layer for AI agents. Choice, Score, and Noul for tool routing, ranking, and gated checks. OSS TypeScript SDK @system-one-ai/core (~2 GitHub stars). GitHub: https://github.com/ziyu/system-one-sdk

## Features

- Choice routing for tools
- Score ranking
- Noul gated checks
- TypeScript SDK

[Try API](https://system-one.dev/en/api)