LLM API gateway security
Secure your AI API infrastructure with enterprise-grade controls: authentication, rate limiting, content inspection, and intelligent provider routing — all through a single secure gateway.
Why AI APIs need specialized gateways
Traditional API gateways handle authentication and routing but cannot inspect what's inside AI requests. An LLM API gateway adds content-level intelligence: PII detection and masking, injection prevention, token usage tracking, and cost optimization through multi-provider routing.
Core capabilities
- Authentication & authorization — API key management, RBAC, and per-user quota enforcement
- Content inspection — PII detection, injection analysis, and content filtering on every request
- Rate limiting — Per-user, per-team, and per-provider rate limits with graceful degradation
- Provider routing — Route requests to optimal providers based on model, cost, and availability
- Cost monitoring — Track token usage and costs by user, team, and application
- Audit logging — Complete audit trail for every API request
Architecture patterns
PromptWall supports multiple deployment patterns: as a standalone proxy for direct API access, behind an existing API gateway for layered security, or in sidecar mode for Kubernetes-native deployments. All patterns share the same policy engine and inspection capabilities.
Secure your AI APIs
Deploy enterprise-grade security for your LLM API infrastructure.
Frequently asked questions
What is an LLM API gateway?+
An LLM API gateway is a reverse proxy that sits between your applications and AI providers (OpenAI, Anthropic, Google). It provides authentication, rate limiting, content inspection, cost monitoring, and provider routing — similar to API gateways for traditional APIs, but purpose-built for AI traffic.
How does it differ from a regular API gateway?+
A regular API gateway handles authentication, routing, and rate limiting for REST/GraphQL APIs. An LLM API gateway adds AI-specific capabilities: prompt content inspection, PII masking, injection detection, token usage tracking, and multi-provider failover based on model capabilities.
Can I use my existing API gateway?+
Existing API gateways (Kong, Apigee) handle transport-level concerns but cannot inspect prompt content. PromptWall can complement your existing gateway by adding the content inspection layer — or operate as a standalone LLM-specific gateway.