# Foil

> Foil builds infrastructure for both sides of the agent economy: device intelligence that detects agent fraud, and a stealth Chromium distribution for trusted agents.

## Overview

Foil Detection provides native SDKs that collect device fingerprints, TLS parameters, hardware signals, and behavioral patterns, then stream encrypted telemetry to a server-side scoring API in real time. Unlike CAPTCHAs, it operates invisibly - no puzzles, no challenges, no user interaction required.

Foil Runtime combines kernel-level patches, proxies, and a stealth browser to help AI agents use the web without getting blocked. Sign up for the private preview.

AAP (Agent Admission Protocol) is an open protocol for AI agents to access financial services with explicit customer consent and institution-defined controls.

Foil Detection offers a free plan with 100 checks per month and paid plans for higher volume. See the pricing page for current plans.

## Key Capabilities

- Classifies visitors as human, bot, or AI agent - with specific agent identification (e.g. GPTBot, Operator, custom automation)
- Detects device spoofing, anti-detect browsers (Multilogin, GoLogin), and headless automation (Puppeteer, Playwright)
- Provides stable device identity that persists across browser resets, incognito mode, and new account signups
- Distinguishes good bots from bad using Web Bot Auth cryptographic verification
- Captures behavioral signals (mouse, touch, scroll, orientation) without recording keystrokes
- SDK hardened with WASM, chain hashing, and sealed server-side scoring to resist reverse engineering

## Use Cases

- AI agent detection and access control
- Account takeover prevention
- Fake account and free tier abuse detection
- Payment fraud prevention
- Content scraping defense
- Safe AI agent onboarding (separating malicious agents from legitimate ones)

## Platforms

- Web (JavaScript SDK)
- iOS (Swift SDK)
- Android (Kotlin SDK)

Each SDK collects 350+ signals specific to its platform.

## Links

- Website: https://usefoil.com
- Foil Detection: https://usefoil.com/products/device-intelligence
- Foil Runtime: https://usefoil.com/products/runtime
- AAP: https://usefoil.com/aap
- Pricing: https://usefoil.com/pricing
- Research: https://usefoil.com/research
- Documentation: https://usefoil.com/docs
- Dashboard: https://dashboard.usefoil.com
- Privacy Policy: https://usefoil.com/privacy
- Terms: https://usefoil.com/terms
- DPA: https://usefoil.com/dpa

## Company

Foil is built by ABXY, Inc., a Delaware corporation.
Contact: alain@abxylabs.com
Twitter: https://x.com/usefoil