AgentGate

AgentGate is an out-of-process authorization proxy and security gateway for autonomous AI agent tool execution. It intercepts tool invocations prior to runtime, evaluates prompt injection and blast-radius risks via a sub-40ms neural classification head, and enforces deterministic access control policies before actions reach production infrastructure.

🎮 Live Interactive Playground: https://huggingface.co/spaces/codeload/agentgate-demo

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Quickstart

git clone https://github.com/mohitdebian/AgentGate.git
cd AgentGate
docker compose up -d
# Dashboard → http://localhost:5173

Drop a tool call into the gateway:

import requests

session = requests.post("http://localhost:8080/v1/sessions", json={
    "agent_id": "my-agent", "goal": "Run system diagnostics"
}).json()

result = requests.post("http://localhost:8080/v1/assess", json={
    "session_id": session["session_id"],
    "action": {"tool": "bash_exec", "arguments": {"command": "rm -rf /var/www"}}
}).json()

# → {"verdict": "deny", "reason_codes": ["untrusted_prompt_influence"]}

For MCP, TypeScript, LangChain, CrewAI, and REST examples → Client Integration Guide

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How It Works

Autonomous agents lack a hard boundary between developer instructions and untrusted data inside the context window. Prompt injection can manipulate an agent into issuing destructive tool calls — and system prompts are bypassed in-context.

AgentGate sits in the synchronous tool execution path and intercepts every call:

sequenceDiagram
    autonumber
    participant Agent as AI Agent / Client
    participant Proxy as AgentGate Proxy (:8080)
    participant Decision as Decision Service (:9000)
    participant DB as PostgreSQL (:5432)
    participant Target as Target Infrastructure

    Agent->>Proxy: POST /v1/assess { session_id, action }
    Proxy->>Decision: POST /decide { text, questions }
    Decision-->>Proxy: Calibrated class probabilities (<40ms)
    Proxy->>DB: Persist audit log and decision payload
    Note over Proxy: Evaluate against policy.yaml

    alt Verdict: ALLOW
        Proxy-->>Agent: { verdict: "allow" }
        Agent->>Target: Execute tool
    else Verdict: DENY
        Proxy-->>Agent: { verdict: "deny", reason: "untrusted_prompt_influence" }
    else Verdict: ASK
        Proxy-->>Agent: { verdict: "ask", decision_id: "..." }
        Note over Proxy: Enqueue in PostgreSQL for operator review
    end

Components:

• Proxy (proxy/) — Fastify TypeScript gateway. Manages sessions, runs policy rules, streams SSE, exposes Prometheus metrics.
• Decision Engine (decision/) — FastAPI inference server running a fine-tuned Qwen 0.8B classification model via Unsloth (codeload/agentgate-qwen-0.8b). Falls back to a calibrated stub in CPU environments.
• Storage (postgres) — PostgreSQL 16 for audit logs, decision traces, and human approval state.
• Dashboard (dashboard/) — React 18 / Vite operator console with live event stream, approvals desk, and policy replay.

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Risk Classification Model

A single forward pass (<38ms p95) across four calibrated heads replaces slow, jailbreakable LLM-as-a-judge approaches:

Model weights, training details, and inference code → Hugging Face Model Hub · Neural Risk Heads wiki

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Benchmarks

make benchmark   # 100-request concurrent load test → 262 req/sec, p95 53ms

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Security Invariants

make verify

=====================================================================================================
AgentGate Automated Security & Compliance Verification
Target Gateway: http://localhost:8080 • Session: s_9142b9cb825f436e
=====================================================================================================
| ID     | Category                             | Tool             | Expected | Received | Latency  | Status |
|:-------|:-------------------------------------|:-----------------|:---------|:---------|:---------|:-------|
| SEC-01 | Prompt Injection (Indirect)          | bash             | DENY     | DENY     | 76ms     | PASS   |
| SEC-02 | Exfiltration Webhook                 | mail_send        | DENY     | DENY     | 60ms     | PASS   |
| SEC-03 | Blast Radius (Destructive Mutation)  | file_edit        | DENY     | DENY     | 59ms     | PASS   |
| SEC-04 | Irreversible Shell Action            | bash_exec        | ASK      | ASK      | 60ms     | PASS   |
| OPS-01 | Benign Operational Query             | database_query   | ALLOW    | ALLOW    | 55ms     | PASS   |
| OPS-02 | Benign Read Operation                | file_read        | ALLOW    | ALLOW    | 59ms     | PASS   |
=====================================================================================================
RESULT: 100% Security Invariants Verified. System is secure.

make demo        # Stream live agent simulation to dashboard → http://localhost:5173

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Documentation

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Development

make setup   # install all dependencies (proxy, dashboard, decision)
make lint    # ESLint + Ruff
make test    # Vitest + Pytest

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License

MIT. See LICENSE.