AI Security Infrastructure

Stop prompt injection
before it hits your AI

One API call screens every user message for injection attacks, jailbreaks, and data exploits. Your AI only sees clean prompts.

prompt-firewall · live demo
70+
Attack patterns blocked
<150ms
Avg response time
99.9%
Target uptime
3
Security checkpoints
How it works

Three checkpoints.
Zero compromises.

Every message passes through a strict pipeline before it reaches your AI model.

STEP 01
Normalize
All text is lowercased and decoded. Hackers cannot bypass rules with weird capitalization or encoding tricks like Base64 or hex.
STEP 02
Length Check
Messages over 500 characters are flagged as data-flood attempts, a common technique to confuse AI context windows.
STEP 03
Blacklist Scan
70+ attack patterns scanned, including prompt injection, SQL injection, XSS, Log4Shell, command injection, and system prompt spoofing.
STEP 04
Verdict and Log
Every request returns PASSED or BLOCKED instantly. All events are written to your persistent security log for audit and review.
# Add the firewall to your app in 5 lines import requests def is_safe(user_message): r = requests.post( "https://prompt-firewall-api.onrender.com/analyze", headers={"X-API-Key": "your-key"}, json={"message": user_message} ) return r.json()["status"] == "PASSED" # In your handler: if is_safe(user_input): reply = ask_your_ai(user_input) else: reply = "I cannot process that request."
01
Works with any language
Python, JavaScript, C#, PHP, or any language that can make an HTTP request. No SDK to install.
02
Works with any AI model
GPT-4, Claude, Gemini, Llama, or any LLM. Prompt Firewall sits in front of your model, not inside it.
03
Deploy in under 5 minutes
Get your API key, add 5 lines of code, and your app is protected. No configuration files, no complex setup.
Live Demo

Try it right now.

Test real attack prompts against your firewall. No signup required.

Reason:
Latency:
Testing with a public demo key, 20 requests per IP. Sign up for full access.
Pricing

Our Plans.

Simple monthly pricing. Get your API key instantly. Cancel anytime, no contracts.

7-DAY FREE TRIAL
Starter
$9
per month, no charge for 7 days
  • 10,000 requests per month
  • 1 API key
  • Security event log
  • Sandbox testing tool
  • False positive reporting
  • Overage pricing available
  • Email support
  • PII masking pipeline
  • Shadow mode
  • Multiple API keys
Business
$199
per month
  • Unlimited requests
  • Unlimited API keys with labels
  • Full security log with latency
  • PII masking pipeline
  • Shadow mode with false positive
  • Sandbox testing tool
  • False positive reporting
  • User ID and model tracking
  • Organization ID for teams
  • Priority support
FAQ

Common questions.

How do I get my API key after paying?
After completing payment via Paddle, your API key is emailed to you within minutes. You can start making requests right away.
Does it work with any AI model?
Yes, Prompt Firewall is model-agnostic. It sits in front of GPT-4, Claude, Gemini, or any other model. You simply check every user message before forwarding it.
What happens if I go over my request limit?
Requests over your monthly limit are paused and return a 429 response. We email you before you hit the limit so you can upgrade or enable overage billing at $0.50 per 1,000 extra requests.
Is my users' data stored?
Only a short preview of each message is stored in the security log, along with the verdict and timestamp. No full message content is retained.
Can I cancel any time?
Yes. Cancel from your dashboard at any time, no questions asked. Your key stays active until the end of the billing period.
What languages does it support?
Any language that can make an HTTP POST request. Python, JavaScript, C#, PHP, Go, Ruby, and more. The user manual inside your dashboard has code examples for each language.