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PromptGuard scans every LLM request and response for security threats — prompt injection, jailbreaks, PII, data exfiltration, toxicity, and more — with sub-200ms latency. Add one line of code to protect your entire application.

Quickstart

Get protected in 5 minutes

Why PromptGuard?

What it protects and why — no code

API Reference

REST API with interactive playground

MCP Server

Connect to Cursor, Claude, VS Code

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Two products, one platform

Both run on the same detection engine and policies, and both can be fully self-hosted — including air-gapped for regulated environments.

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How it works

Three ways to integrate:

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What we detect

Prompt Injection and Jailbreaks

ML ensemble plus LLM-powered analysis across 7 attack categories, including multi-turn escalation.

PII and Secrets

39+ entity types with checksum validation. API keys, tokens, and credentials with entropy analysis.

Content Safety

Toxicity, multi-turn intent drift, streaming output guardrails, and MCP tool security.

AI Agent Traps

21 attack vectors from DeepMind’s framework: steganography, RAG poisoning, sub-agent spawning, and more.