Prompt Injection Shield — Sanitize Text for LLMs
Paste untrusted text and get an LLM-safe version with detected injection patterns neutralized and flagged.
A free first line of defense for AI pipelines. Paste untrusted text — emails, reviews, web content — and the shield neutralizes common prompt-injection patterns (like "ignore previous instructions") and returns a sanitized, LLM-safe version plus the list of patterns detected. Free 5 sanitizations per day per IP, no signup.
Daily free limit reached
You've used your 5 free uses today. Continue pay-per-use via the DeFi Intel Agent Gateway API, or add a prepaid API key above for unlimited use.
Use this at scale or in your own tools
The same engine powers the DeFi Intel Agent Gateway: 40+ paid microservices on USDC (Base), no API keys required for pay-per-call, MCP transport for AI agents. Free samples daily.
Frequently asked questions
Is the prompt injection shield free?
Yes — 5 free sanitizations per day per IP, no signup. Beyond that, use the DeFi Intel Agent Gateway API (pay-per-use) or a prepaid API key.
What does it protect against?
Common prompt-injection and jailbreak patterns, such as "ignore previous instructions", "reveal your system prompt", and role-override attempts. Detected patterns are neutralized and reported.
What output do I get?
A sanitized version safe to pass to an LLM, the list of detected injection patterns, and the number of removed characters.
Is it a complete security solution?
No — it is a pattern-based first layer. Use it alongside system-prompt hardening, input allow-listing, and output filtering for defense in depth.
Powered by the DeFi Intel Agent Gateway (x402/MPP, USDC on Base). Free tier: 5 calls/day/IP. Prices from $0.001/call. For education — not financial advice.