Using DeFi without knowing it? How Base onboards 660K daily users

660,000 people use Base every day without realizing they're using a blockchain. No seed phrase, no ETH gas, no MetaMask. They open the Coinbase app, request a loan against their Bitcoin, and an immutable Morpho smart contract executes it in the background. Base is the L2 (Layer 2, a network that processes transactions off-chain to reduce costs) that has decided the best way to bring DeFi to 100 million people is to make DeFi disappear. It just broke away from Optimism to move faster — and it dominates 60% of L2 transactions.

This article analyzes how Base went from zero to dominating 60% of L2 transactions in two years, why it broke away from the Superchain (Optimism's network of interoperable L2s), what the x402 protocol means for the AI agent economy, and why Ethereum's most successful L2 is also its most centralized.

How did Base come to dominate 60% of L2 transactions in two years?

Base launched in August 2023 on Optimism's OP Stack. As of April 2026, it processes 60% of all Ethereum Layer 2 transactions — more than Arbitrum, Optimism, and all others combined.

The advantage is not technical — Arbitrum is Stage 1 (the level where fraud proofs and forced exit mechanisms already exist) just like Base. The advantage is distribution. Base has direct access to Coinbase's 110 million verified users, now a federal bank, and $130 billion in custodied assets. It doesn't need to acquire users from scratch — it has them in the app they already use.

Why don't Base users know they're using blockchain?

Because Base has systematically eliminated all the friction that makes DeFi intimidating for the average user:

Smart Wallet without a seed phrase

The Coinbase Smart Wallet uses Passkeys — facial recognition or device fingerprint. There are no 12 words to save. No risk of losing keys. For a user coming from a banking app, the experience is indistinguishable from opening an account with Revolut.

Gas paid in USDC (or free)

dApps can sponsor their users' gas through Paymaster contracts — users don't need to buy ETH to get started. And if they pay, they can do so in USDC instead of ETH. For someone who doesn't understand what "gas" is, the difference is between abandoning the app in 30 seconds and completing the transaction.

Magic Spend: use your Coinbase balance directly on-chain

If you have funds on Coinbase (exchange), Magic Spend allows you to use them in Base apps without a manual transfer. Your custodial balance becomes on-chain funds with one click. It's the most invisible bridge between CeFi and DeFi that exists — and it's exactly the pattern of the "DeFi Mullet": the interface is a bank, the execution is a smart contract.

Why did Base break away from Optimism?

In February 2026, Base announced it would stop relying on Optimism's OP Stack to develop its own technology stack ("base/base"). The OP token fell 28% in 48 hours.

The technical reasons:

• Innovation speed: Coordinating updates with OP Labs, Flashbots, and Paradigm slowed Base's ability to iterate. With its own stack, they can perform 3-6 hard forks per year.
• Extreme performance: The goal of 1 gigagas per second (a measure of massive processing capacity — 10x the current level) requires migrating to Reth (Rust client), moving away from the Go-based op-geth.
• Sovereignty: Base generates 96.5% of the gas fees Optimism receives. Paying 2.5% of revenue + 15% of profits for a stack it no longer needs makes no economic sense.

The original agreement: Base received 118 million OP tokens (~$175 M) in exchange for a 6-year commitment to the Superchain. The breakup does not invalidate the legal agreement — but it empties the vision of a "unified Superchain" of meaning when the dominant member decides to go it alone.

For users: nothing changes operationally. Base remains an optimistic rollup that publishes data to Ethereum. Security comes from the L1, not Optimism. The real risk is in bridges, not in who maintains the rollup code. What changes is that Base is no longer limited by the innovation speed of others.

What is x402 and how does it allow AI agents to pay on Base?

x402 uses HTTP 402 ("Payment Required") to allow AI agents to pay for APIs and digital resources autonomously. The flow:

1. An AI agent requests market data (premium API).
2. The server responds with HTTP 402: "costs $0.01 USDC".
3. The agent signs a transaction from its Smart Wallet on Base.
4. The server verifies the payment on-chain (~2 seconds) and delivers the data.

The x402 Foundation is backed by Google, Microsoft, Amazon, and Cloudflare. Micropayments of $0.01 are unfeasible with traditional processors (Stripe charges $0.30 + 2.9%). On Base, the transaction cost is < $0.001. This enables an economy where AI agents already competing in trading can also pay for the data they need — without a credit card, without a subscription, without human intervention.

Agentic.market, launched in April 2026, already has hundreds of thousands of AI agents transacting on Base. It's the marketplace where programs buy services from other programs — a machine-to-machine economy that didn't exist 12 months ago.

Is Base the most successful L2 or the most centralized?

Both. And that's the tension that defines its future:

Schwab opens crypto to 39 million accounts from the comfort of its platform. Base does the same from Coinbase — but with the difference that underneath there are smart contracts, not closed custody. The DeFi Mullet in its purest form: if the sequencer (the entity that orders transactions) works and Coinbase operates normally, the user has the best of both worlds. If the sequencer fails or Coinbase makes a unilateral decision, the user discovers that their "DeFi" depended on a single company.

The promise: Stage 2 by 2027, with complementary ZK proofs and a governance token that distributes control to the community. The reality: today, April 2026, Base is an L2 controlled by Coinbase with the most polished user experience in the ecosystem. Decentralization is a roadmap, not a current state.

Does Base capture value while Ethereum only collects pennies for security?

Base has shown that mass adoption of Ethereum doesn't happen by people "using Ethereum" — it happens by people using apps that run on Ethereum without knowing it. This is the thesis that the Solana vs Ethereum debate doesn't capture: they don't compete for the same users. Solana competes for crypto-natives who want speed. Base competes for the 110 million people who already have a Coinbase account and don't know what an L2 is.

The risk for Ethereum: if Base dominates execution and captures economic value, Ethereum becomes a "settlement layer" that charges pennies per blob (the data packets that L2s publish to Ethereum) while Base charges dollars for sequencing. Ethereum pays for security; Base takes the margin. This is sustainable as long as ETH maintains value as an asset — but if staking yields fall and validators lose incentive, the security Base inherits weakens. The long-term value of ETH determines the viability of this model.

For the user: Base is probably the easiest way to use DeFi today. Stablecoin lending, crypto cards, and the AI agent economy converge here. But ease comes at a price: you trust Coinbase as an invisible intermediary. If that's fine with you, Base is the gateway. If not, self-custody on L1 remains the alternative — slower, more expensive, but without intermediaries. The choice depends on which risk you prefer to take.