Use Case
API Security with Sentinel
Classify every API caller before your app logic runs
The problem
Modern APIs are called by a growing mix of browsers, mobile apps, AI agents, CLI tools, and malicious bots. Without visibility into caller identity, teams are forced to choose between locking down their API (blocking legitimate use) or leaving it open to abuse.
The solution
Sentinel classifies every API caller using TLS fingerprinting, header analysis, and behavioral patterns — all at the edge, before your application code executes. Allow verified browsers and AI agents, challenge suspicious callers, and block bots automatically.
Code example
const caller = await sentinel.classify(request);
if (caller.type === "bot" && !caller.isVerifiedCrawler) {
return new Response("Blocked", { status: 403 });
}
if (caller.type === "ai-agent") {
return handleAgentRequest(request, caller);
}
return handleBrowserRequest(request);Key signals
Start identifying devices today
Free tier includes 25,000 identifications per month. No credit card required.