API key authentication, rate limiting, and abuse prevention as a drop-in Express.js library.

Decision API for AI abuse prevention.

Device fingerprinting for BirrJS trial abuse prevention

Production-grade TypeScript backend framework. Native PostgreSQL wire driver, JWT, WebSockets, clustering, runtime input validation, field-level encryption, abuse prevention, moderation & privacy controls. No Express. No pg. No Prisma. Minimal, carefully

A React hook that makes it easy to use the [Cap.js](https://capjs.js.org) proof-of-work abuse prevention library in React projects.

CAPTCHA-free API bot protection and abuse prevention middleware for Node.js, Express, Next.js, and serverless APIs.

Minimal Secure Evidence Gateway for Pi Coding Agent — search, web_search, web_fetch, research_search. Intent-based provider routing, quota fallback, dual-LLM research, 4-layer abuse prevention.

A lightweight cache for file metadata, ideal for processes that work on a specific set of files and only need to reprocess files that have changed since the last run

Rate limiting middleware for SnapAgent SDK - Per-user rate limiting and abuse prevention.

Comprehensive list of free email provider domains for signup validation and disposable filtering.

Abuse signals, risk scoring, rate-limit contracts, and analytics primitives for OpenDJ.

Basic IP rate-limiting middleware for Express that slows down responses rather than blocking the user.

GitLab OAuth authentication plugin for OpenCode

[](https://www.npmjs.com/package/ts-proto) [](https://github.com/stephenh/ts-proto/actions)

A modular, policy-driven, in-process rate limiter for abuse prevention in sensitive auth flows

A JavaScript library for interfacing with BotGuard.

A shim for the setImmediate efficient script yielding API

Elegant Console Wrapper

Simple, type-safe, "singleton" implementation.

Job scheduling for Node.js with overlap prevention, distributed coordination, and background tasks. Zero dependencies, written in TypeScript.