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clerk
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clerk-chrome-extension-patterns

Authenticate Chrome extension users with Clerk across popup, background, and content-script contexts.

66|4|Updated Jan 6, 2026
Search Tags:#authentication#background#clerk#chrome-extension#content-script#plasmo#sync-host
One-click install
npx skills add https://github.com/clerk/skills --skill clerk-chrome-extension-patterns-clerk
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: clerk-chrome-extension-patterns
Source: https://github.com/clerk/skills/tree/main/skills/frameworks/clerk-chrome-extension-patterns
Command: npx skills add https://github.com/clerk/skills --skill clerk-chrome-extension-patterns-clerk

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Chrome extensions often struggle to implement secure user authentication. Clerk's chrome-extension patterns provide a drop-in approach to authenticate users via Clerk in popup, background, and content-script contexts.

Core Features & Use Cases

  • ClerkProvider integration for Chrome extensions using @clerk/chrome-extension.
  • syncHost and background client patterns to enable authentication across popup, headless, and content-script scenarios.
  • Guidance for manifest and Origin management to maintain stable extension IDs and allowed origins.

Quick Start

Install the Clerk Chrome extension patterns scaffold and start integrating Clerk in your extension immediately.

Frequently Asked Questions about clerk-chrome-extension-patterns

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I authenticate users in a Chrome extension using Clerk?▼

To authenticate users in a Chrome extension using Clerk, integrate ClerkProvider from @clerk/chrome-extension to enable popup-based sign-in flows, background client patterns, and content-script messaging for token retrieval.

Can I use Clerk authentication in a Plasmo content-script context?▼

Yes, Clerk supports content-script contexts within Plasmo-based setups by utilizing content-script messaging for token retrieval and configuring syncHost to share authentication state across extension components.

What is the syncHost pattern for Clerk Chrome extensions?▼

The syncHost pattern enables authentication across popup, headless, and content-script scenarios by synchronizing the Clerk authentication state between the extension's active contexts and the background service worker.

How do I get Clerk tokens in a headless Chrome extension background script?▼

Retrieve Clerk tokens in a headless background script by using createClerkClient for background operations, allowing secure authentication and token access without a popup interface.

Does Clerk require specific manifest host_permissions for Chrome extensions?▼

Yes, Clerk requires proper manifest host_permissions and origin management to maintain stable CRX IDs and ensure allowed origins function correctly across Chrome extension authentication flows.

Why does my Clerk Chrome extension ID change and break authentication?▼

Extension ID changes break authentication when allowed origins are not properly configured; managing manifest host_permissions and ensuring CRX ID stability maintains consistent Clerk origin validation.

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