Most LLM stacks have zero adversarial testing. Stockyard runs automated attacks against your proxy, detects PII in prompts, and blocks injection attempts in real time.
Run a free 5-probe quickscan. Get a security grade (A–F) in 10 seconds. No API key sharing, no setup.
Enable prompt guard, secret scan, and code fence modules. Injection attempts, PII, and system prompt leaks are caught in the middleware chain.
Run the full 29-probe red-team suite. Attacks that bypass defenses are mutated and retried across generations to find deeper weaknesses.
Auto-insights detected PII in 12 of 100 recent requests — email addresses, credit card numbers, and names being sent to third-party providers.
See the data →Application-level guardrails are one code change away from being disabled. Infrastructure-level guardrails run regardless of what the application does. Stockyard's guardrail middleware inspects every request before it reaches the LLM provider. Define blocked patterns — PII formats, prompt injection signatures, topic restrictions — and the middleware rejects matching requests with a structured error. The application never needs guardrail logic because the proxy handles it.
Rate limiting through Cutoff prevents runaway API consumption. Set a budget per endpoint, per user, or per model, and the middleware enforces it. When a limit is hit, the response explains what was exceeded and when the limit resets. Combined with cost tracking through Trough, you get both a spending cap and visibility into what drove the spending. For teams deploying LLM features to external users, this combination prevents the two most common disasters: a prompt injection that generates harmful content, and a usage spike that generates a five-figure API bill.
Install Stockyard, send a request, watch it flow through the middleware chain. Everything on this page starts working immediately.