Explore MetaMask Delegation Toolkit today to build a new web3 user experience for your users

Build with MetaMask

A suite of developer tools to empower dapp developers to build innovative experiences for the most powerful, crypto-native users on MetaMask

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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

How Collab.Land and MetaMask Are Paving the Way for New Transaction Primitives

Collab.Land and MetaMask’s Delegation Toolkit redefines web3 transactions with smart accounts.

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Galxe x MetaMask SDK: Creating a Frictionless Web3 Experience for Users

Learn how Galxe’s integration of MetaMask SDK streamlines wallet connections for a faster, smoother web3 experience.

Read

5 Insights From Vitalik's Builder Nights Keynote

Explore key insights from Vitalik’s keynote, including how Account Abstraction was always part of the roadmap, the need for interoperability and L2 standardization, and more.

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Release Notes

MetaMask Snaps

v80.0.0 (Dec 4, 2024)

@metamask/notification-example-snap 2.2.0

Changed

Add link to notification example (#2915)

@metamask/snaps-cli 6.5.4

Fixed

Bundle and initialize WASM modules using Base64 encoding (#2913)

@metamask/snaps-controllers 9.15.0

Added

Add clientCryptography property for specifying custom cryptography functions (#2909)

@metamask/snaps-jest 8.8.1

Changed

Bump @metamask/key-tree from ^9.1.2 to ^10.0.1 (#2909)

@metamask/snaps-rpc-methods 11.7.0

Added

Add JSX content property to snap_notify (#2881)
- This content will be displayed in an upcoming expanded view for notifications.
Add getClientCryptography hook for specifying custom cryptography functions (#2909)

@metamask/snaps-sdk 6.13.0

Added

Add size prop to Text (#2908)
Add JSX content property to snap_notify (#2881)
- This content will be displayed in an upcoming expanded view for notifications.