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Telemetry & Monitoring Agent for the [guard ecosystem](https://github.com/rennf93) (TypeScript / Node.js). Companion agent to [guard-core-ts](https://github.com/Guard-Core/guard-core-ts) and its thin adapters.

Website · Docs · Playground · Dashboard · Discord

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Ecosystem

Guard Core is the Python engine. Framework adapters are thin wrappers that translate native request/response types into Guard Core's protocols. The telemetry agents ship security events and metrics to the monitoring backend. Parallel engine implementations exist for Go, PHP, TypeScript (on npm), and Rust (on crates.io) - all ports of the same reference semantics, conformance-tested against the shared adversarial corpus.

Python

Package	Role	PyPI
guard-core	Framework-agnostic security engine
guard-agent	Telemetry agent
fastapi-guard	FastAPI / Starlette adapter
flaskapi-guard	Flask adapter
djapi-guard	Django adapter
tornadoapi-guard	Tornado adapter

Go

Go modules published via GitHub releases. Production-ready.

Package	Role	Release
guard-core-go	Go engine
nethttp-guard	net/http adapter
gin-guard	Gin adapter
echo-guard	Echo (v4) adapter
fiber-guard	Fiber (v3) adapter
guard-agent-go	Telemetry agent

PHP

Published on Packagist under the rennf93 vendor. Production-ready.

Package	Role	Packagist
guard-core-php	PHP engine
laravel-guard	Laravel adapter
symfony-guard	Symfony adapter
psr15-guard	PSR-15 adapter
slim-guard	Slim 4 adapter
guard-agent-php	Telemetry agent

TypeScript / JavaScript

Published under the @guardcore npm scope; source in the guard-core-ts monorepo. Production-ready.

Package	Role	npm
	@guardcore/core	Core engine
@guardcore/express	Express adapter
@guardcore/nestjs	NestJS adapter
@guardcore/fastify	Fastify adapter
@guardcore/hono	Hono (edge) adapter
guardagent	Telemetry agent

Rust

Published on crates.io. Production-ready.

Package	Role	crates.io
guard-core-engine	Core engine crate
guard-core-rs	Facade crate (consumer entry point)
actix-guard-rs	Actix Web adapter
axum-guard-rs	Axum adapter
tower-guard-rs	Tower adapter
rocket-guard-rs	Rocket adapter
guard-agent-rs	Telemetry agent

AI Coding Agents

Package	Role	PyPI
guard-core-mcp	MCP server: config validation, docs search, detection sandbox

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Features

• At-least-once delivery with per-kind buffers, periodic and watermark-driven flushes, and configurable overflow policies
• Retry with exponential backoff, 413 batch split-or-drop, and Retry-After honoring
• Circuit breaker with degraded-state detection and permanent-rejection handling
• Optional Redis-backed queue persistence for crash recovery
• Dynamic rules polled from the ingestion API on a TTL cache
• Persisted install id and HMAC payload signing

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Documentation

📚 Documentation - full technical documentation for this package.

🛡️ Guard Core - the engine's reference documentation.

🤖 Monitoring Agent Integration - monitor your Guard instance with a monitoring agent.

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Install

pnpm add guardagent
pnpm add ioredis   # optional: crash-recovery persistence

Usage

import { GuardAgent, AgentConfig } from "guardagent";

const agent = new GuardAgent(AgentConfig.create({
  endpoint: "https://api.guard-core.com",
  apiKey: process.env.GUARD_API_KEY!,
  projectId: "my-project",
}));
await agent.start();

agent.sendEvent({ kind: "security_event", payload: { /* ... */ } });

await agent.stop(); // final flush + confirm

At-least-once delivery, 413 split-or-drop, Retry-After backoff, permanent-rejection handling, degraded-state detection, TTL-cached dynamic rules polled from GET /api/v1/rules on dynamicRuleInterval (agent.getDynamicRules()), and optional Redis crash recovery. See AGENTS.md for the full reliability semantics.

About

The guard ecosystem provides application-layer API security middleware across multiple languages and frameworks:

• Python: fastapi-guard, flaskapi-guard, djapi-guard, tornadoapi-guard, with guard-agent for telemetry
• TypeScript: guard-core-ts with adapters for Express, Fastify, Hono, NestJS
• Rust: guard-core-rs with adapters for tower, axum, actix-web, rocket, plus guard-agent-rs for telemetry

License

MIT