How to | MetaMask developer documentation

📄️ Request permissions

Request permissions in a manifest file.

Communicate errors from your Snap without crashing it.

Set environment variables on the command line or in a `.env` file.

Restrict your Snap's RPC API methods.

Authorize specific websites to automatically connect to a Snap.

Use Jest for end-to-end Snap testing.

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Publish a Snap to npm.

Submit your Snap for allowlisting on the MetaMask extension.

Connect your dapp to existing, third-party Snaps.