Open Policy Agent is a lightweight, general-purpose policy engine that lets you define and enforce rules across services, infrastructure, and CI/CD pipelines. With IAST (Interactive Application Security Testing) integration, OPA can act in real time, analyzing application behavior, intercepting potential security violations, and making policy decisions instantly.
OPA uses Rego, a declarative policy language, to write conditions that can be applied anywhere — from Kubernetes admission controllers to API gateways. When paired with IAST, those same rules can adapt based on live application context, like user roles, request patterns, or detected vulnerabilities. This means you can block risky actions before they hit production, rather than just reporting them after the fact.
Modern engineering teams use IAST + OPA to:
- Enforce compliance at runtime.
- Stop insecure API calls based on request payloads.
- Control feature flags and access rights dynamically.
- Detect and respond to threats during the build, test, and deploy cycle.
Because OPA is decoupled from your app logic, the same policies enforce consistently across microservices, cloud resources, and local dev environments. You can test and evolve them without code rebuilds. With IAST feeding live data into OPA, the accuracy and context of policies increase dramatically. False positives drop. Security friction decreases.
If your security checks only run after deployment, you're already too late. IAST Open Policy Agent shifts enforcement left and right at the same time — into builds, tests, and active runtime traffic. Fast decisions, central control, and distributed enforcement give you precision without slowdown.
See how IAST OPA can work in your environment. Deploy policies, run tests, and view results with hoop.dev — live in minutes.