Developer Tools

Kastra

Authorization layer for AI systems — checks every AI action (prompts, tool calls, shell commands) against policy before it runs, in under a millisecond.

Visit Website

kastra.ai

Verified API available Free tier

Quick facts
What is it	Authorization layer for AI systems — checks every AI action (prompts, tool calls, shell commands) against policy before it runs, in under a millisecond.
Pricing	Freemium — from $19.99/mo
Free tier	Yes
Platform	Web Application
API	Yes
Best for	preventing AI agents from deleting production databases or reading secrets, enforcing policy on developer laptops for Claude Code, Cursor, and Codex CLI
Domain registered	2025

Data updated Aug. 1, 2026

What does Kastra do?

Kastra is an authorization layer designed specifically for AI systems. It sits between your AI agents (like Claude Code, Cursor, or custom agents) and the tools, databases, and APIs they interact with. Before any action executes — whether it's a shell command, a file write, a database query, or an API call — Kastra checks it against your policy and either allows or denies it. The whole decision takes less than a millisecond. This isn't monitoring or logging after the fact; it's real-time enforcement that stops risky actions before they happen.

Kastra works through a four-step pipeline: identity verification, scope evaluation, guardrail matching, and signed audit logging. You write policies using a typed DSL that feels like code — version-controlled and reviewable. The tool runs in multiple deployment models: cloud, self-hosted, or air-gapped. It also offers Kastra Edge, a local daemon that governs coding agents on developer laptops, and Kastra Recon, which scans your AI's history to surface past risky actions and draft policies for them. Every decision is signed and replayable, making audits straightforward.

This tool is built for engineering and security teams that need to govern autonomous AI agents without slowing down development. It's especially useful in regulated industries like finance and healthcare, where you need to prove that AI actions are controlled and auditable. If you're running AI coding agents, browser automation, or any autonomous workflow, Kastra gives you a way to say "no" before something bad happens — not after.

Developer Tools

#ai-generative-media#ai infrastructure#ai voice agents#authentication-identity#automation#code-review-tools#command line tools#community management#databases-and-backend#design resources#finance#fundraising-resources#lead generation#llm-developer-tools#marketing-sales#no-code platforms#prompt-engineering-tools#search#security software#vibe coding

Key features

What makes it stand out

Runtime authorization checks every prompt, tool call, and API request against policy in under a millisecond

Policy engine with a typed DSL for writing version-controlled, reviewable rules

Kastra Edge — local governance on developer laptops for Claude Code, Cursor, Codex CLI, and terminal AI

Signed, append-only audit trail that streams to your SIEM and passes compliance audits

Kastra Recon — scans your AI's history to find past risky actions and auto-drafts policies

Who is Kastra for?

Who benefits most from this tool

preventing AI agents from deleting production databases or reading secrets

enforcing policy on developer laptops for Claude Code, Cursor, and Codex CLI

auditing all AI actions for SOC 2, HIPAA, or FedRAMP compliance

Pricing

Free tier available — start without a credit card

Free

1 developer · 1 machine
50K authorization decisions / month
7-day audit retention
Claude Code + Codex CLI support
Prebuilt safety packs
Shadow mode + destructive-action blocking
Local machine governance
Kastra Recon scan
Kastra Edge local enforcement
Community support

Pro

$19.99/month

1 developer · 1 machine
1M authorization decisions / month
90-day audit retention
Custom policies + versioning
Plain-English AI rule generation
YAML + UI-based policy management
Kastra Recon with auto-drafted policies
Kastra Edge on every machine
Slack + webhook alerts
CSV / JSON audit exports
Priority support

Team

$49.99/month

Pooled authorization infrastructure
10M authorization decisions / month
Shared audit infrastructure
1-year+ audit retention
Centralized policy management
Admin-enforced policies
Mandatory runtime enforcement
Cross-machine policy synchronization
Fleet-wide audit visibility
Team-wide Kastra Recon
Fleet-wide Kastra Edge enforcement
Usage analytics
Team onboarding + fast support

Enterprise

Custom

Unlimited authorization scale
Multi-region deployments
Self-hosted + private cloud
Advanced RBAC, SSO / SAML
Dedicated VPC infrastructure
Compliance + extended retention
Enterprise SLAs + incident response
Dedicated runtime governance architecture reviews
Custom Kastra Recon deployments
Custom Kastra Edge fleet rollouts
Custom integrations + regulatory support

Trust & presence

Domain Domain registered 2025

Gallery

Click any image to enlarge

Alternatives in Developer Tools

Constellation Gate AI Developer Tools

Drop-in security layer for AI agents — blocks prompt injections, redacts secrets, and cuts token costs automatically.

kluster.ai Developer Tools

Real-time AI code review that catches bugs and security risks as you type, directly in your IDE.

Perf Developer Tools

AI output verification layer — checks, fixes, and blocks unsafe AI responses before they reach users or systems.

n8n

Orca Developer Tools

A desktop IDE for running multiple AI coding agents (like Claude Code) in parallel with integrated terminals and worktrees.

Mastra Developer Tools

TypeScript framework for building AI agents with tools for workflows, RAG, memory, and deployment

HOL Guard Developer Tools

Blocks AI coding agents from reading secrets, running risky commands, or making dangerous config changes before they execute

Sentrely Developer Tools

Managed control plane for AI agents — policy enforcement, audit trails, and human-in-the-loop approvals.

Aegisora Developer Tools

Security control plane for AI agents — enforce least-privilege access, block PII leaks, and get readable audit logs.