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CastlAI

CastlAI is an AI-agent governance gateway purpose-built for MCP systems. It enforces policies, controls tools in real time and keeps an audit trail—so teams can run agent workflows safely, even in locked-down environments.
Rating:
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MCP agent governanceAI agent security gatewayMCP JSON-RPC inspectionpolicy-as-code for AI agentsAI agent audit trailon-prem agent gatewayhuman-in-the-loop approval

Features of CastlAI

Deep-scan every MCP JSON-RPC request and tool-call payload at the gateway
Apply per-call policies: allow, block or escalate to human approval
Dynamically mask tools so agents see only what the current task needs
Route high-risk actions to existing approval workflows without blocking the business
Version and review policies as code for Git-style change management
Export structured audit logs in JSON for compliance reviews and forensics
Deploy inside air-gapped, on-prem or isolated networks with a single Docker image
Ships as a centralized MCP Gateway that sits inline with zero agent-side changes

Use Cases of CastlAI

Centralize access and usage policies when rolling out internal AI agents on MCP tools
Block prompt-injection chains that try to trick agents into unauthorized calls
Add tiered approvals for delete, deploy, payment or other high-impact operations
Give security teams searchable session and tool-call records for any agent behavior
Keep governance local and traffic inspection inline in restricted or classified networks
Let multiple teams ship agent features under one codified rule-set with version control
Plug high-risk actions into ServiceNow, Jira or any existing approval queue

FAQ about CastlAI

QWhat is CastlAI?

CastlAI is a governance gateway for MCP-based AI agents. It enforces policies, controls tool access and keeps an audit trail.

QWhich AI-agent risks does CastlAI tackle?

It focuses on invisible agent behavior, prompt-injection attacks that trigger unauthorized calls, and over-privileged actions.

QHow does CastlAI handle MCP tool calls?

It inspects every MCP JSON-RPC request inline and applies allow, deny or escalate-to-approval decisions.

QDoes CastlAI support human approval?

Yes—high-risk requests can be routed to any existing human-approval workflow before execution.

QCan CastlAI run on-prem or in isolated networks?

Yes. The gateway is designed for restricted environments and ships as a Docker container for local or air-gapped deployment.

QHow are policies managed?

Policies are written as code, versioned in Git and reviewed like any other codebase.

QWhat audit capabilities does CastlAI provide?

It produces structured audit trails and evidence logs that can be exported as JSON for investigations and compliance.

QIs CastlAI production-ready today?

The site lists it as Public Beta / PoC. Contact the team via the website for commercial onboarding details.

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