Envlet
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Platforms

Envlet on Vercel

One ENVLET_TOKEN in Vercel project settings. Your functions and server components inject the rest at boot.

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Set the token
vercel env add ENVLET_TOKEN production
Inject at boot
import { inject } from "@envlet/sdk";

export async function register() {
  await inject();
}

Set up

  1. 01

    Create a token

    Create an identity for Vercel and a token for the environment it deploys.

  2. 02

    Set one secret

    Add ENVLET_TOKEN as a Vercel environment variable for each environment, production, preview, and development, each with its own Envlet token.

  3. 03

    Start through Envlet

    Call inject() in instrumentation.ts (Next.js) or at the top of your server entry. Edge functions use load() and read the returned object.

Questions

Will my app start if Envlet is down?
No, and that is the point. It retries for a few seconds, then fails so you notice, instead of starting with half an environment.
Do I still need Vercel's own secret store?
Only for ENVLET_TOKEN. Everything else lives in Envlet, so you rotate in one place.

Also for

Stop pasting .env files.

One command. The right values for whoever runs it.

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