Metamask

What is MetaMask?

MetaMask is a self-custodial cryptocurrency wallet that enables users to store, send, receive, and swap assets on Ethereum and any EVM-compatible blockchain network. Available as both a browser extension and mobile app, MetaMask supports seamless Web3 access via dApp connections, token swaps, and NFT interaction :contentReference[oaicite:3]{index=3}.

Developed by ConsenSys since 2016, MetaMask empowers over 100 million users worldwide through its privacy-first design, encrypted key storage, phishing protection, and hardware-wallet integrations :contentReference[oaicite:4]{index=4}.

Main Functions

• Buy, send, and receive cryptocurrencies and tokens via built-in fiat on/off ramps :contentReference[oaicite:5]{index=5}.
• Swap tokens using integrated DEX aggregator—MetaMask Swaps—at market-leading rates :contentReference[oaicite:6]{index=6}.
• Connect and interact with Ethereum-based dApps, wallets, and games.
• Display and manage NFTs directly in the wallet interface.
• Hardware wallet support—Ledger, Trezor, and others—for enhanced security :contentReference[oaicite:7]{index=7}.

What is the MetaMask Debit Card by Mastercard?

In collaboration with Mastercard and Baanx (powered by CompoSecure), MetaMask has launched a crypto debit card currently in limited pilot rollout across the EU, U.K., Brazil, Mexico, and Colombia. The card is now entering early-access stages in the U.S.—excluding New York and Vermont—allowing users to spend directly from their MetaMask wallets at any Mastercard merchant without pre-funding or centralized off-ramps :contentReference[oaicite:8]{index=8}.

The card operates on the ConsenSys-built Linea L2 network, with transactions settled in under five seconds. During checkout, a smart contract validates the purchase while preserving self-custody until final approval. Some users may also qualify for a premium metal version launching globally in Q2 2025 :contentReference[oaicite:9]{index=9}.

Security & Privacy Features

• Encrypted key storage and phishing alerts protect users proactively :contentReference[oaicite:10]{index=10}.
• Users control RPC endpoints and can disable telemetry & NFT image loading for increased privacy :contentReference[oaicite:11]{index=11}.
• Hardware wallet support ensures private keys never leave secure devices during signing :contentReference[oaicite:12]{index=12}.

Why It Matters for Accounting Teams

When linked to Cryptoworth’s accounting platform, MetaMask unlocks robust data flows for digital asset tracking and financial reporting:

• Comprehensive transaction logs—including buying, swapping, staking, and NFT transfers—with timestamps, transaction hashes, and value metadata.
• Card spending data straight from MetaMask Card entries, including fiat conversions, gas breakdowns, and merchant metadata.
• Cost basis & gain/loss calculations across swaps and fiat off-ramps, automated via Cryptoworth’s tools.
• Unified view of self-custody wallet activity combined with on-chain smart contract usage and external card transactions.

This integrated setup automates journal entries, cost-basis analysis, and audit-ready reporting—reducing manual data imports and reconciliation errors.

Frequently Asked Questions

1. Can Cryptoworth calculate cost basis for tokens swapped via MetaMask?

Yes. MetaMask’s DEX swaps include value, timestamp, and token pair data. Cryptoworth ingests these on‑chain events to calculate weighted average cost and generate accounting journal entries accurately.

2. Does Cryptoworth support MetaMask Card purchases?

Absolutely. Card transactions—complete with fiat value, gas information, and merchant details—are synced automatically into Cryptoworth as expenses or ledger entries. This simplifies month-end reconciliation.

3. What security and privacy data is available for audit?

MetaMask records signed transactions, hardware wallet confirmations, phishing warnings, and RPC decisions. With Cryptoworth, this logs into internal control systems as part of your audit trail and compliance framework.