---
title: "Scalebrowser Blog, page 2"
description: "Guides and measurements for teams whose AI agents drive a real browser: detection, captchas, sign-ins and infrastructure."
canonical: "https://scalebrowser.net/blog/page/2"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://scalebrowser.net/llms.txt
> Use this file to discover all available pages before exploring further.

# Scalebrowser Blog, page 2

> Guides and measurements for teams whose AI agents drive a real browser: detection, captchas, sign-ins and infrastructure.

- [Substack API: the official MCP can't publish, an agent can](https://scalebrowser.net/blog/substack-api.md): Substack's official MCP server only reads publication data. What an AI agent can do on Substack in your signed-in browser, and what we measured logged out.
- [WhatsApp MCP: answer your chats with an AI agent, no API](https://scalebrowser.net/blog/whatsapp-mcp.md): Meta's WhatsApp Business Platform is closed to general-purpose AI assistants. How an agent uses your own WhatsApp through WhatsApp Web, with 3 signed-out runs.
- [Zillow API: listings are invite-only, the website isn't](https://scalebrowser.net/blog/zillow-api.md): Zillow's listing data is invite only. How an AI agent searches zillow.com like you do instead, and what 5 signed-out runs on 11 October 2026 showed.
- [Computer use agent or browser agent: 2 ways to see a page](https://scalebrowser.net/blog/computer-use-agent.md): Computer use agents read screenshots, browser agents read a page map: tokens per step, precision, what each can reach, and why a site detects neither by its method.
- [AI agent security: what a signed-in agent never gets](https://scalebrowser.net/blog/ai-agent-security.md): How to limit an AI agent that works in a signed-in browser: the 3 prompt kinds it never answers, server-side limits instead of prompt rules, and keys kept out.
- [AI agent observability: 1 still image for every browser step](https://scalebrowser.net/blog/ai-agent-observability.md): How to record and audit what an AI agent did in a browser: 1 step per tool call, a still per step, stated outcomes, and proof recording leaves input timing alone.
- [User agent spoofing: why 2 Chrome versions behind is a tell](https://scalebrowser.net/blog/user-agent-spoofing.md): User agent spoofing against client hints, TLS and Chrome's two-week release cycle: why a changed string contradicts itself and why a frozen version stands out.
- [Proxy detection: 4 signals that give a proxy exit away](https://scalebrowser.net/blog/proxy-detection.md): How a site detects a proxy exit from 4 signals: IP reputation, the exit's TCP fingerprint, a WebRTC route and the clock, with our readings of September 2026.
- [TikTok MCP: let an AI agent upload and answer comments](https://scalebrowser.net/blog/tiktok-mcp.md): What a TikTok MCP server can do: API posts stay private until an audit and an unaudited app serves 5 users a day, while a signed-in browser posts like you.
- [WebGL fingerprint: why SwiftShader is a bot signal](https://scalebrowser.net/blog/webgl-fingerprint.md): What a WebGL fingerprint reveals about the graphics card, why SwiftShader rendering is a bot signal, and why a spoofed renderer string contradicts its own pixels.
- [navigator.webdriver and CDP detection: 9 checks Reddit runs](https://scalebrowser.net/blog/webdriver-cdp-detection.md): What Reddit's 9 platform health checks read, run verbatim on 8 September 2026 against a person, a bare CDP driver and our browser, and why webdriver is 1 of 17.
- [Facebook MCP: an AI agent for your groups, pages and DMs](https://scalebrowser.net/blog/facebook-mcp.md): A Facebook MCP server on Meta's Graph API cannot reach groups since 22 April 2024. What a browser signed in to your profile reads, and what 4 signed-out runs showed.

Page 2 of 7. Previous: [page 1](https://scalebrowser.net/blog.md). Next: [page 3](https://scalebrowser.net/blog/page/3.md).