The API that guards
your LLM stack.
LLMFence is the high-performance firewall for autonomous agents. Stop PII leaks, block prompt injection, and enforce brand safety in milliseconds.
Trusted by Industry Leaders
Capabilities
Defensive Intelligence.
One API call. Complete protection for your production AI pipelines.
Custom Policy Engine
Define exact natural language rules for your AI. Enforce compliance, safety, and brand voice in less than 1ms.
Accuracy
Latency
rule "Competitor Safety" :
// Prevent leakage
if response.mentions("competitor_x"):
block_with_redaction()
PII Shield
Auto-detect and redact sensitive data like SSNs, emails, and physical addresses at 100k+ req/sec.
Sub-ms Latency
Optimized C++ inference core ensures your security layer adds zero perceptible lag to user interactions.
Real-time Telemetry
Complete visibility into blocked attempts, risk patterns, and consumption metrics via our immersive console.
- Live traffic monitoring
- Custom risk thresholds
- Webhooks & Alerts
Integration
One Request.
Total Control.
The most powerful security layer is also the simplest to integrate. Language agnostic. REST-native.
Edge Native
Deployed to 200+ edge locations for global coverage.
Simple SDKs
Native clients for Node.js, Python, and Go.
curl -X POST "https://api.llmfence.io/v1/check" \
-H "Authorization: Bearer sk_*****" \
-d '{ "text": "..." }'
// Result
{
"status": "secure",
"risk": 0.02
}Latency Performance
Inferences Protected
Uptime Guarantee
Simple Tiers
Metered Safety.
One powerful engine, three ways to scale. From startup to enterprise.
Launch
Scale Confidently
- 50,000 monthly requests
- Full PII Redaction
- Priority Overage support
- custom risk webhooks
Scale
Enterprise Ready
- 500,000 monthly requests
- Custom policy rules
- 99.99% Uptime SLA
- Priority Slack support