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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1">
<title>AgentShield — Safety Layer for Autonomous AI Agents</title>
<meta name="description" content="The safety layer for autonomous AI agents. 7 composable rules + emergency kill switch, evaluated per-transaction in under 1ms. No dependencies beyond Python 3 stdlib.">
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<meta property="og:type" content="website">
<meta property="og:title" content="AgentShield — Safety Layer for Autonomous AI Agents">
<meta property="og:description" content="The safety layer for autonomous AI agents. 7 composable rules + kill switch, evaluated per-transaction in under 1ms. Python stdlib only — zero dependencies.">
<meta property="og:url" content="https://agentshield.fly.dev">
<meta property="og:site_name" content="AgentShield">
<!-- Twitter Card -->
<meta name="twitter:card" content="summary">
<meta name="twitter:title" content="AgentShield — The Safety Layer for Autonomous AI Agents">
<meta name="twitter:description" content="The safety layer for autonomous AI. 7 enforcement rules + kill switch + emergency scanner, <1ms per transaction, 56/56 eval gym.">
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{"@type": "Offer", "price": "499", "priceCurrency": "USD", "description": "Managed tier: 100 agents, 200 rules, 50,000 daily evaluations"}
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}
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<style>
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a { color: var(--accent); text-decoration: none; }
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.hero h1 { font-size: 2em; }
}
</style>
<script>
// Lightweight self-hosted analytics — no cookies, no external deps
(function() {
function track(event) {
try {
navigator.sendBeacon('/api/track', JSON.stringify({
e: event,
p: location.pathname,
r: document.referrer.slice(0, 100),
t: Date.now()
}));
} catch (err) {}
}
// Page view
track('pageview');
// CTA clicks
document.addEventListener('click', function(ev) {
var a = ev.target.closest('a');
if (!a) return;
if (a.textContent.indexOf('Try it free') > -1) track('cta_try_free');
else if (a.textContent.indexOf('GitHub') > -1) track('cta_github');
else if (a.href && a.href.indexOf('#risk-calculator') > -1) track('cta_risk_calc');
});
})();
</script>
</head>
<body>
<div class="hero">
<div class="container">
<div class="as-seen" style="margin-bottom:16px;font-size:13px;opacity:0.75">
As featured on: <strong>Dev.to</strong> · <strong>OpenClaw #42475</strong> · <strong>GitHub</strong>
</div>
<h1>The Safety Layer for <span>Autonomous AI Agents</span></h1>
<p>Last month, an autonomous agent spent $2,800 in 60 seconds — while its developer slept. AgentShield evaluates every API call against your rules in under 1ms, BEFORE it executes. 7 composable rules. Zero dependencies. One kill switch.</p>
<a href="#risk-calculator" class="cta-btn">Calculate Your Risk Score (30 sec, no signup) →</a>
<a href="/the-2800-story" class="cta-btn" style="background:transparent;border:1px solid var(--accent);color:var(--accent);margin-left:12px">Read the $2,800 Story →</a>
</div>
</div>
<section class="social-proof" style="padding:32px 0;text-align:center">
<div class="container">
<div class="stats-row" style="display:flex;justify-content:center;gap:48px;flex-wrap:wrap">
<div class="stat"><strong style="font-size:28px">56/56</strong><br/><span style="font-size:13px;opacity:0.7">Eval scenarios passing</span></div>
<div class="stat"><strong style="font-size:28px"><1ms</strong><br/><span style="font-size:13px;opacity:0.7">Per-transaction eval</span></div>
<div class="stat"><strong style="font-size:28px">9</strong><br/><span style="font-size:13px;opacity:0.7">Enforcement rule types</span></div>
<div class="stat"><strong style="font-size:28px">0</strong><br/><span style="font-size:13px;opacity:0.7">Pip dependencies</span></div>
</div>
</div>
</section>
<section class="false-beliefs">
<div class="container">
<h2>What You Believe vs. What's True</h2>
<div class="belief-grid">
<div class="belief-card">
<div class="lie">❌ "API rate limits already protect me"</div>
<div class="desc">Rate limits cap requests per minute. They don't cap spend per transaction. A single $133 API call passes every rate limit you have — and your agent can make 21 of them in 60 seconds.</div>
<div class="truth"><strong>Truth:</strong> Rate limits throttle speed, not cost. A $133-per-call endpoint is invisible to your rate limiter.</div>
</div>
<div class="belief-card">
<div class="lie">❌ "I set up budget alerts. I'd notice."</div>
<div class="desc">Budget alerts are emails. They arrive after the spend happens. At 3 AM, you're asleep. By the time you wake up, the agent has moved on — and your wallet is $2,800 lighter.</div>
<div class="truth"><strong>Truth:</strong> Alerts tell you about the fire after the house burned down. AgentShield stops the match before it strikes.</div>
</div>
<div class="belief-card">
<div class="lie">❌ "I only run a few agents. I can monitor manually."</div>
<div class="desc">Today you run 3 agents. Tomorrow it's 10. Next month it's 50 agents across 4 vendors, each making 200 calls/hour. Manual monitoring doesn't scale — and it breaks exactly when you're tired.</div>
<div class="truth"><strong>Truth:</strong> Human monitoring fails at the exact moment you need it most: 3 AM, weekend, holiday, or when you simply forget.</div>
</div>
</div>
</div>
</section>
<section class="problem">
<div class="container">
<h2>The $2,800 Wake-Up Call</h2>
<div class="problem-card">
<div class="amount">$2,800 in 60 seconds</div>
<p style="margin-top:12px;color:var(--muted)">At 3 AM, an AI agent made 21 API calls to a premium endpoint. Each cost $133. By the time the budget alert email arrived, it was too late. The agent had already moved on to its next task.</p>
<div class="compare">
<div class="old">
<h3>Without AgentShield</h3>
<ul>
<li>API rate limits kick in too late</li>
<li>Budget alerts arrive via email — while you sleep</li>
<li>Manual monitoring doesn't scale past 3 agents</li>
<li>No per-merchant guardrails</li>
<li>No velocity controls</li>
</ul>
</div>
<div class="new">
<h3>With AgentShield</h3>
<ul>
<li>Every transaction evaluated in <1ms</li>
<li>7 rule types: limit, daily, velocity, allowlist, category, session budget, cascade cost</li>
<li>Real-time SSE alerts the instant a block fires</li>
<li>Multi-tenant isolation out of the box</li>
<li>Offline cryptographic licensing — no server dependency</li>
</ul>
</div>
</div>
</div>
</div>
</section>
<section class="epiphany">
<div class="container">
<div class="quote">
<p>I sat in bed at 6:17 AM, staring at the email. <strong style="color:var(--danger)">$2,793.00.</strong></p>
<p>I scrolled through 21 identical charges. The agent was doing exactly what I told it to do — optimize, iterate, don't stop until the task is done.</p>
<p>My rate limiter was happy. My budget alert fired. My dashboard showed the spike. Everything worked exactly as designed.</p>
<p class="key">But every tool I had was reactive.</p>
<p>They told me about the fire. None of them could prevent it.</p>
<p class="resolve">So I built one that could.</p>
</div>
</div>
</section>
<section class="how">
<div class="container">
<h2>How It Works</h2>
<div class="steps">
<div class="step">
<div class="num">1</div>
<h3>Connect Your Agent</h3>
<p>Generate an API key for each agent. Route transactions through the <code>/v1/transactions/evaluate</code> endpoint before they execute.</p>
</div>
<div class="step">
<div class="num">2</div>
<h3>Set Your Rules</h3>
<p>Configure transaction limits, daily caps, velocity thresholds, merchant allowlists, and category blocks via the dashboard or API.</p>
</div>
<div class="step">
<div class="num">3</div>
<h3>Sleep Easy</h3>
<p>Every transaction is evaluated against your rules in <1ms. Blocks fire instantly and stream to your dashboard via SSE.</p>
</div>
</div>
</div>
</section>
<section class="framework">
<div class="container">
<h2>The <span>Pre-Flight Enforcement Protocol™</span></h2>
<div class="framework-grid">
<div class="framework-col">
<div class="icon">🔍</div>
<h3>SCREEN</h3>
<p>Every transaction is intercepted before it hits the API. Merchant, amount, category, velocity — all captured in real time.</p>
</div>
<div class="framework-col">
<div class="icon">⚡</div>
<h3>EVALUATE</h3>
<p>Your composable rules run in <1ms. Transaction limits, daily caps, velocity thresholds, allowlists — all checked, all at once.</p>
</div>
<div class="framework-col">
<div class="icon">🛡️</div>
<h3>ENFORCE</h3>
<p>Dangerous transactions are blocked before execution. Not alerted. Not logged. Blocked. The API call never fires.</p>
</div>
</div>
<div class="bottom-line">
<p><strong>Monitor</strong> = watch it burn. <strong>Alert</strong> = email about the fire. <span class="green"><strong>Enforce</strong> = stop the match before it strikes.</span></p>
</div>
</div>
</section>
<section class="risk-calc" id="risk-calculator">
<div class="container">
<h2>Agent Spend Risk Calculator</h2>
<p>See your financial risk profile in real time. No signup required.</p>
<div class="calc-box">
<label>Number of AI agents</label>
<input type="number" id="calc-agents" value="3" min="0">
<label>Average transaction amount ($)</label>
<input type="number" id="calc-amount" value="0.50" min="0" step="0.01">
<label>Transactions per hour per agent</label>
<input type="number" id="calc-freq" value="20" min="0">
<label>Monthly budget ($)</label>
<input type="number" id="calc-budget" value="500" min="0">
<button class="calc-btn" onclick="calculateRisk()">Calculate My Risk</button>
<div class="result-box" id="calc-result">
<div class="score-val" id="score-val">—</div>
<div class="score-label" id="score-label">Risk Score</div>
<div class="overage" id="overage"></div>
<div id="recommendation" style="margin-top:16px;color:var(--muted);font-size:0.9em"></div>
</div>
</div>
</div>
</section>
<section class="value-stack">
<div class="container">
<h2>What You Actually Get (Dev Tier)</h2>
<div class="value-table">
<div class="value-row"><span class="item">5 AI agents</span><span class="val"><s>$95/mo</s></span></div>
<div class="value-row"><span class="item">10 custom rules</span><span class="val"><s>$50/mo</s></span></div>
<div class="value-row"><span class="item">1K daily evaluations</span><span class="val"><s>$29/mo</s></span></div>
<div class="value-row"><span class="item">Real-time alerts (SSE)</span><span class="val"><s>$19/mo</s></span></div>
<div class="value-row"><span class="item">API access + dashboard</span><span class="val"><s>$15/mo</s></span></div>
<div class="value-row"><span class="item">One prevented $2,800 incident</span><span class="val"><s>$2,800</s></span></div>
</div>
<div class="value-total">
<span class="label">Total value: <s>$3,008/mo</s><br>Your price:</span>
<span class="price-final">$19/mo</span>
</div>
<div style="text-align:center">
<a href="/auth" class="cta-btn">Start Free Trial →</a>
</div>
</div>
</section>
<section class="pricing">
<div class="container">
<h2>Simple Pricing</h2>
<div class="price-grid">
<div class="price-card">
<h3>Free</h3>
<div class="price">$0</div>
<ul>
<li>1 AI agent</li>
<li>0 custom rules</li>
<li>100 daily evaluations</li>
<li>Community support</li>
</ul>
</div>
<div class="price-card featured">
<div class="badge">POPULAR</div>
<h3>Dev</h3>
<div class="price">$19<small>/mo</small></div>
<div style="background:#22c55e;color:white;padding:4px 12px;border-radius:6px;font-size:13px;font-weight:600;display:inline-block;margin-bottom:8px">14-Day Free Trial</div>
<ul>
<li>5 AI agents</li>
<li>10 custom rules</li>
<li>1,000 daily evaluations</li>
<li>Email alerts</li>
<li>API access</li>
</ul>
<a href="/auth" class="cta-btn" style="display:block;text-align:center;margin-top:12px;padding:10px;background:#4f46e5;color:white;border-radius:8px;text-decoration:none;font-weight:600">Start 14-Day Free Trial →</a>
</div>
<div class="price-card">
<h3>Team</h3>
<div class="price">$99<small>/mo</small></div>
<ul>
<li>20 AI agents</li>
<li>50 custom rules</li>
<li>5,000 daily evaluations</li>
<li>SSE real-time alerts</li>
<li>Priority support</li>
</ul>
</div>
<div class="price-card">
<h3>Managed</h3>
<div class="price">$499<small>/mo</small></div>
<ul>
<li>100 AI agents</li>
<li>200 custom rules</li>
<li>50,000 daily evaluations</li>
<li>Custom integrations</li>
<li>SLA + dedicated support</li>
</ul>
</div>
</div>
<p style="text-align:center;margin-top:24px;font-size:15px;color:#94a3b8">
An unprotected runaway agent: <strong style="color:#ef4444">$2,800</strong>.
A whole year of AgentShield Dev: <strong style="color:#22c55e">$228</strong>.
You do the math.
</p>
</div>
</section>
<section class="founder">
<div class="container">
<div class="bio">
<p>Hi, I'm Maryan. I'm a developer who lost $2,800 in 60 seconds because my AI agent didn't know when to stop.</p>
<p>The agent was doing its job. My tools were doing theirs. The problem was that "doing their job" meant watching the disaster happen and emailing me about it afterward.</p>
<p>So I built AgentShield — a pre-flight enforcement layer that blocks dangerous transactions <em>before</em> they execute, not after. It's open source under the MIT license. The core engine runs on Python 3 stdlib with zero pip dependencies.</p>
<p class="small">Read the full story: <a href="/the-2800-story">The $2,800 Story</a> · Star the repo: <a href="https://github.com/kindrat86/agentshield">GitHub</a></p>
</div>
</div>
</section>
<section class="faq">
<div class="container">
<h2>Questions, Answered</h2>
<div class="faq-item">
<div class="q">Will this slow down my agents?</div>
<div class="a">No. Every evaluation runs in under 1ms. That's faster than a single network round-trip. Your agents won't notice AgentShield is there — until it saves them from a $133 API call.</div>
</div>
<div class="faq-item">
<div class="q">Do I need to rewrite my agent code?</div>
<div class="a">No. You route transactions through a single endpoint (<code>/v1/transactions/evaluate</code>) before they execute. One line in your HTTP client. That's it.</div>
</div>
<div class="faq-item">
<div class="q">What if a rule blocks a legitimate transaction?</div>
<div class="a">The rules are yours. You set the limits, thresholds, and allowlists. If something gets blocked that shouldn't, adjust the rule — or add a merchant to the allowlist. You're always in control.</div>
</div>
<div class="faq-item">
<div class="q">Is this just another monitoring tool?</div>
<div class="a">No. Monitoring tools watch transactions after they happen. AgentShield blocks them before they execute. The API call never fires. That's the difference between a smoke alarm and a fire extinguisher.</div>
</div>
<div class="faq-item">
<div class="q">Can I just use rate limits and alerts?</div>
<div class="a">You can — and you'll get the same result I did: a $2,800 bill at 3 AM. Rate limits cap speed, not spend. Alerts arrive after the damage. <a href="/the-2800-story">Read the $2,800 story</a> to see exactly how they fail.</div>
</div>
</div>
</section>
<section class="two-futures">
<div class="container">
<h2>Two Futures. One Choice.</h2>
<div class="futures-grid">
<div class="futures-col">
<div class="without">
<h3>Without AgentShield</h3>
<ul>
<li>✗ You wake up to a $2,800 API bill</li>
<li>✗ Budget alerts arrive after the spend</li>
<li>✗ Rate limits don't cap cost-per-call</li>
<li>✗ Manual monitoring breaks at 3 AM</li>
<li>✗ Every new agent is a new risk surface</li>
<li>✗ You're one prompt away from a costly mistake</li>
</ul>
</div>
</div>
<div class="futures-col">
<div class="with">
<h3>With AgentShield</h3>
<ul>
<li>✓ Dangerous transactions blocked before execution</li>
<li>✓ Every API call evaluated in <1ms</li>
<li>✓ 7 composable rules, fully customizable</li>
<li>✓ Real-time SSE alerts the instant a block fires</li>
<li>✓ Scale to 100+ agents without losing sleep</li>
<li>✓ One kill switch for instant emergency shutdown</li>
</ul>
</div>
</div>
</div>
<div style="text-align:center">
<a href="#risk-calculator" class="cta-btn">Start With Your Free Risk Score →</a>
</div>
</div>
</section>
<section class="capture">
<div class="container">
<h2>Get Your Risk Report</h2>
<p>We'll send you a detailed breakdown of your agent spend risk and recommended firewall rules.</p>
<form class="capture-form" onsubmit="submitEmail(event)">
<input type="email" id="email-input" placeholder="you@company.com" required>
<button type="submit">Get Report</button>
</form>
<div id="email-msg" style="margin-top:16px;display:none"></div>
</div>
</section>
<footer>
<p>AgentShield — The Safety Layer for Autonomous AI Agents. Built with Python 3.11 stdlib. Eval gym: 56/56 across 9 scenario categories.</p>
</footer>
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<h3>Wait — Before You Go</h3>
<div class="price-tag">$7</div>
<p>Get the AgentShield Starter Kit: a plug-and-play ruleset template, a 5-minute setup guide, and a pre-configured eval gym. Everything you need to protect your first agent tonight.</p>
<a href="/tripwire" class="cta-btn">Get the $7 Starter Kit →</a>
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<div style="background:#141414;padding:24px;text-align:center;border-top:1px solid #2a2a2a">
<p style="color:#888;font-size:14px;margin-bottom:8px">AgentShield — The Safety Layer for Autonomous AI Agents</p>
<p style="font-size:13px">
<a href="/" style="color:#00d4aa;text-decoration:none">Home</a> ·
<a href="/audit" style="color:#00d4aa;text-decoration:none">Audit</a> ·
<a href="/eval-gym-spec" style="color:#00d4aa;text-decoration:none">Eval Gym Spec</a> ·
<a href="/blog/zeroclaw-preflight-enforcement" style="color:#00d4aa;text-decoration:none">ZeroClaw Case Study</a> ·
<a href="/comparisons/helicone" style="color:#00d4aa;text-decoration:none">vs Helicone</a> ·
<a href="/comparisons/langsmith" style="color:#00d4aa;text-decoration:none">vs LangSmith</a> ·
<a href="https://github.com/kindrat86/agentshield" style="color:#00d4aa;text-decoration:none">GitHub</a> ·
<a href="/eval" style="color:#00d4aa;text-decoration:none">Eval Gym</a> ·
<a href="/tools/risk-calculator/" style="color:#00d4aa;text-decoration:none">Risk Calculator</a>
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