DKnownAI Guard
API security for AI agents — detects prompt injection and manipulation attempts without blocking legitimate system commands.
| What is it | API security for AI agents — detects prompt injection and manipulation attempts without blocking legitimate system commands. |
|---|---|
| Pricing | Freemium — from $1.99/mo |
| Free tier | Yes |
| Platform | API |
| API | Yes |
| Best for | Securing AI agents that execute code or manage systems, Preventing malicious takeover of customer-facing AI tools |
Data updated Aug. 1, 2026
What does DKnownAI Guard do?
DKnownAI Guard is a security API specifically designed for agentic AI systems. It analyzes user inputs to detect and block attempts to manipulate or hijack AI agents, such as prompt injection and jailbreak attacks. Unlike traditional content filters that might block legitimate system commands, DKnownAI Guard focuses on identifying deceptive intent, allowing useful agent operations to continue while stopping malicious ones. The core of DKnownAI Guard is its four-level classification system. It categorizes every request as AGENT_HACK (block immediately), SYS_FLAG (a risky system operation for developer review), CONTENT_FLAG (content that may violate compliance rules), or SAFE (process normally). This intent-driven approach means a command to delete a database from a legitimate admin is flagged for review but not automatically blocked, while a sneaky attempt to trick the agent into revealing credentials is stopped outright. Developers integrating AI agents that perform real-world tasks, like coding assistants or system managers, will find this tool most beneficial. It provides a necessary safety net that protects the agent's autonomy without crippling its functionality, which is essential for agents that operate in production environments.
Key features
What makes it stand outWho is DKnownAI Guard for?
Who benefits most from this toolPricing
Free tier available — start without a credit cardFree
- 1,000 API calls
- 1,000 API calls / month
- All four safety classifications
- Multilingual support
- REST API
- Email support
Pro
Everything in Free, plus:
- 5,000 API calls
- 5,000 API calls / month
- All Free features included
- Priority technical support
- Built for production teams
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