Grok Fact Checker

Star_tanuki07
2026-03-17T01:24:04Z

Adds a 🤖 fact-check button to every post on X (Twitter), Threads, Bluesky, and Mastodon. Click to open Grok in a new private tab with a pre-filled prompt and post URL — privacy mode and focus mode are applied automatically. Long-press for instant auto-send. Includes Grok ad removal and multi-language auto-detection. Best suited for users who occasionally encounter unfamiliar news or claims and want a quick, discreet way to verify them.

✨ Fact-Check Any Social Media Post with One Click

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Adds a 🤖 fact-check button to every post on X (Twitter), Threads, Bluesky, and Mastodon, opening Grok in a new private tab with a pre-filled verification prompt and the post URL.

💡 Overview When you click the 🤖 button on any post, the script opens Grok in a new tab with Privacy Mode and Focus Mode applied automatically, so no check history is stored in your Grok conversation log. The prompt and post URL are filled in for you — no copy-pasting required. A long-press on the button triggers an auto-send shortcut that submits the prompt immediately. The script also removes promotional upsell banners from the Grok interface as a background convenience.

🛡️ Design Philosophy

The starting point for this script is self-defense against misinformation: giving users a way to verify a suspicious post in real time, with as little friction as possible, without breaking their browsing flow.

Why Grok? Grok has a direct connection to X's live data stream, which gives it native context on the topics, people, and events circulating on social platforms. For content that originates on X, Threads, or Bluesky, that real-time awareness means Grok can assess claims with more immediate background knowledge than an AI working from a static training cutoff.

Privacy by default. Every fact-check session opens in Grok's Privacy Mode before any prompt is entered, so the check does not appear in your conversation history. The intent is to let users verify information discreetly, without that browsing behavior being logged or surfaced later.

This script is built for users who are not closely following every news cycle, but who occasionally come across a post that does not add up and want a quick, low-key way to check it — without switching apps, searching manually, or writing a prompt from scratch.

🎛 Getting Started

After installation, a 🤖 robot icon appears in the action toolbar of every post across all supported platforms. No additional setup is required — the script activates automatically when you visit a supported site.

Icon | Control | Where It Appears
🤖 | Fact-check button | Post action toolbar (next to reply, repost, like) on X, Threads, Bluesky, and Mastodon

On first run, a language selection panel appears so you can choose your preferred interface language. This can be changed at any time from the script manager menu.

🚀 Core Features

🤖 One-Click Fact-Check

Sends the post URL to Grok with a structured fact-checking prompt in your chosen language.

Click the 🤖 button on any post

A new Grok tab opens automatically

Privacy Mode and Focus Mode are applied before the prompt is entered

The prompt and post URL are filled into the input field

A brief status overlay confirms each step as it completes

⚡ Long-Press Auto-Send

Hold the 🤖 button for approximately one second to activate Fast Direct Mode, which submits the prompt to Grok without requiring any manual action.

Press and hold the button — the icon shifts to a 🚀 indicator while charging

Release after the icon changes to confirm the mode

Grok opens, sets up Privacy Mode and Focus Mode, fills the prompt, and submits it automatically

🔒 Automatic Privacy Mode

Every fact-check session activates Grok's built-in Privacy Mode before any prompt is entered, ensuring the check does not appear in your Grok conversation history.

Applies automatically on every check — no manual toggle needed

If the Privacy Mode control is unavailable on the page, the script skips it gracefully and continues

🎯 Automatic Focus Mode

Focus Mode is also activated automatically each time a fact-check session opens, hiding Grok's navigation elements to keep the response in view without distraction.

Applies automatically alongside Privacy Mode — no manual action required

If Focus Mode is unavailable or already active, the step is skipped without interrupting the workflow

🧹 Grok Ad Removal

Promotional upsell banners inside the Grok interface are hidden automatically whenever you use the fact-check feature.

Runs silently in the background — no user action required

Targets only known promotional elements; page content is not affected

🧪 Experimental Features & Known Limitations

Bluesky support relies on stable interface attributes from the current Bluesky web app. Layout changes on Bluesky may affect button placement or detection before an update is released.

Focus Mode auto-activation uses a combination of label matching across multiple languages and SVG icon recognition as a fallback. If Grok updates its interface layout or icon set, Focus Mode may silently skip without affecting the rest of the workflow.

Auto-send timing depends on Grok's page load speed. On slow connections, the send button may not be located in time and the prompt will remain filled but unsent — submit it manually in that case.

Mastodon support covers mastodon.social, mastodon.online, mastodon.world, mstdn.jp, and subdomains of mastodon.social. Other Mastodon instances are not currently matched.

⚙️ Additional Features

🌐 Language Selection

The fact-checking prompt and all script UI text — including the status overlay and script manager menu labels — adapt to your chosen language. Eight languages are supported:

🇺🇸 English

🇹🇼 Traditional Chinese

🇨🇳 Simplified Chinese

🇯🇵 Japanese

🇰🇷 Korean

🇪🇸 Spanish

🇧🇷 Portuguese (Brazil)

🇫🇷 French

⚙️ Default Auto-Send Toggle

By default, a normal click fills the prompt without submitting it (Standard Mode). You can switch the default behaviour so that every click auto-sends without requiring a long-press.

Open your script manager menu

Select Auto Send to toggle between ✅ ON and ❌ OFF

The page reloads to apply the change

Scripts with similar functionality X (Twitter) — Grok Commander

This userscript is primarily maintained on Greasy Fork.

Built with AI assistance by a hobbyist developer. Bug fixes and updates may not be immediate.

Feedback is welcome. Responses may be assisted by translation tools if needed.