GitHub Repository

Local, offline emulator for Clerk auth (Backend API + FAPI). Real JWT signing, orgs, M2M tokens & webhooks. Works with @clerk/backend.

3 starsTypeScript

Local Clerk emulator for isolated dev environments

Name: Local Clerk emulator for isolated dev environments
Availability: InStock
Author: psnyder

by psnyder·Jun 18, 2026·1 point·0 comments

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AI Analysis

●MidSolve My Problem

Local Clerk emulator when teams share preview instances for local dev.

Strengths

•Real JWT signing means @clerk/backend and clerk-js work unmodified against it
•In-process mode for tests via Hono app — no separate server process needed
•Supports organizations, M2M tokens, sessions, and webhook emulation

Weaknesses

•Clerk-specific only — doesn't help if you're using Auth0, Supabase, or custom auth
•In-memory state resets every run unless you configure persistence manually

Post Description

Spun up a local Clerk emulator for testing and local developer stacks. Previously, engineers were sharing a single "preview" Clerk instance for local development, which led to a poor local dev experience for our team +Can also be used for isolated integration testing