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Clerk.io Developer Documentation

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API Reference Help Articles Service Status Product Updates Log In

Clerk.io Developer Documentation

Welcome to the Clerk.io Developer Documentation.

Here you find our developer documentation for our API and all our SDK's.

How Clerk.io Works

How The Clerk.io Platform Works

API

Basics
Authentication
Errors
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Clerk.js

Quick Start
Template Language
UI Kit
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EMAIL

MJML Template Language

LEGACY

Data Feed Specification