AgentGate

AgentGate is an authorization proxy and safety gateway that intercepts tool calls before execution.

AgentGate is an out-of-process, fail-closed authorization firewall that intercepts tool calls like bash, sql, and webhooks before they run. Instead of relying on a slow LLM judge or system prompts, it uses a local neural classification head to score prompt injection and blast radius in under 35ms. Hard code rules in a policy.yaml file block attacks before they reach production servers. The system runs security completely outside the model context in an independent proxy that the agent cannot touch or edit. It integrates with MCP, Python, TypeScript, LangChain, CrewAI, and REST APIs, and supports deployment via Docker and Kubernetes under an MIT license.

AgentGate at a glance

Best for: Software engineer
Runs on: Docker, Kubernetes, API, self-hosted, open source
Pricing: Free and open source under MIT license
Released: October 2026
Category: AI coding tool
Website: github.com/mohitdebian/agentgate

Key features

Intercepts tool calls before execution
Local neural classification head scores risk
Evaluates prompt injection and blast radius
Enforces deterministic rules via policy.yaml
Runs out-of-process in an independent proxy
Integrates with Python, TypeScript, and LangChain

Use it for

Prevent dangerous bash commands in autonomous AI agents
Block prompt injection attacks targeting tool execution
Enforce authorization policies on SQL and webhooks

Alternatives to AgentGate

SentinelGate — Stops prompt injections and tool hijacks with sub-millisecond overhead.
AgentGuard — Get a security and quality assessment of AI skills in seconds without an account.
AgentTrust — Enforces zero-trust policy rules and maintains an immutable cryptographic audit ledger.
Planlock — Stops unauthorized agent calls through code enforcement instead of prompts.
AG-UI — Standardizes agent-user interactions and generative UI for applications.
TaintWall — Enforces deterministic security policies at the tool boundary for AI agents.
Proxy — Restricts agent access and stops context sharing across multiple personal agents
mcpgawk — Pins each tool to what you approved and blocks calls if a server changes.
Agent Middleware — Requires signed permits and provides offline-verifiable receipts for tool calls.
AgentDock — It coordinates multi-device workflows and provides secure environment access.
AgentMail — Enables AI agents to send and receive emails programmatically via REST API.
Aegis Kernel — Stops prompt injection and tool-hijacking at the OS syscall boundary.

All AgentGate alternatives