Power your dapp and reach new users with the MetaMask Developer Platform

Discover the tutorials, tools, sample code, events, startup programs, and join our developer community.

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Build your dapp using the same infrastructure and APIs powering web3's most popular open-source wallet.

MetaMask Wallet API

Enable your users to connect and interact with their MetaMask wallets

Documentation
EIP-6963
API Playground

MetaMask Snaps

Customize MetaMask with your own features and extend your reach millions of users.

Documentation
Tutorials
Discover Snaps

Infura APIs

Connect the infrastructure and APIs that support MetaMask

Gas API
Documentation
Getting Started
Faucet for Test ETH

Test and deploy with Linea

Deploy your smart contract on Linea's EVM-equivalent Layer 2 zk-rollup

Quickstart
Documentation
Wallet Setup
Test ETH Faucets
Linea Apps Ecosystem

Tutorials

Tutorials, workshops, and walkthroughs building web3 dapps, for developers, by developers.

Use the Gas API to estimate and optimize transaction fees

The Gas API powers Metamask’s Gas Estimation feature. Learn how you can add it to your build for superior UX, cost savings, or lightning-fast transactions.

Tutorial

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What are Snaps? A Developer Into

Snaps allows you extend the functionality of MetaMask. This video will cover what APIs are available to you, and how they can be used.

Guide

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How to create a MetaMask Snap

Get started with Snaps. In this video, you’ll learn how install MetaMask Flask, use our template, start development servers, and connect MetaMask to your own Snap.

Guide

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Read the latest news

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Explore the latest MetaMask news and announcements

Viem vs. Ethers.js: A Detailed Comparison for Web3 Developers

This blog explores the differences, benefits, and trade-offs between Ethers.js and Viem for building dapps on Ethereum

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Top Three Libraries for Web3 Developers

This MetaMask Developer blog explores some of the top libraries for Ethereum development and their key features for web3 developers.

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How MetaMask Developer Helps PADO Labs Bring Off-chain Data On-chain to Scale Faster

Learn how MetaMask Developer enables PADO Labs to bring private, off-chain data to web3 through its tooling, the Consensys fellowship and Linea Voyages.

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Community Calls

View on YouTube

MetaMask Developer Community Call April 2024

1:03:38

MetaMask Developer Community Call January 2024

MetaMask Snaps – Now in Open Beta | Community Call ft. Christian Montoya

57:24

View on YouTube

Release Notes

MetaMask Snaps

v47.0.0 (May 16, 2024)

@metamask/snaps-rpc-methods 9.0.0

Added

Add support for BIP-32-Ed25519 / CIP-3 key derivation (#2408)
- The ed25519Bip32 curve is now supported for snap_getBip32Entropy and snap_getBip32PublicKey