json-rules

The ultimate JSON-based rule engine that turns complex business logic into declarative configurations. Built for developers who believe code should be expressive, not repetitive.

Generic Rules engine in golang

📐 A fast, general-purpose JSON Rules Engine.

Flexible JavaScript rule engine for dynamic business logic, validation, and decision-making with JSON-based rules and built-in security.

✨Extensible, declarative linter for golang!

A Kotlin library for evaluating JSON-defined conditions against arbitrary context objects, with a threshold-based alert engine

A tiny (≈ 1 KB gzipped), zero-dependency TypeScript library for evaluating rule trees expressed as JSON-serializable data.

⏸ Paused — not actively maintained, not recommended for use (may be revived). Dynamic form generation with conditional field logic; pairs with json-rules.

Work with JsonLogic business rules — the JSON-based conditional-logic format at jsonlogic.com. Use whenever the user wants to turn a business requirement into a JsonLogic rule, needs an existing JsonLogic expression explained or debugged, asks whether a rule is valid, wants to execute JsonLogic in a specific language (JavaScript, TypeScript, Python

AI-friendly TypeScript rules engine for serializable JSON business rules and deterministic workflow decisions — LLM guardrails, agent-readable docs (llms.txt), MCP-ready.

Sample Endpoint to Play With

Tokenlay Rules Engine

Headless visual rule builder for json-rules: a React hook that offers exactly the operators and fields the engine can actually run.