99.9% Uptime • SLA Guaranteed • 1000+ RPS

Ethereum API for Wallet Data, Tokens, NFTs, DeFi Positions

Start for Free View Docs

API product site

Complete Ethereum API Product Suite

Production-ready endpoints that power the next generation of Base applications.

Wallet Portfolio

Complete portfolio aggregation in one call

/wallets/{address}/portfolio

Get comprehensive wallet holdings with real-time pricing and portfolio analytics

Multi-Chain balances

Portfolio breakdown

USD valuations

Portfolio Docs

DeFi Positions

Track positions across 8000+ protocols

/wallets/{address}/positions

Monitor DeFi positions across thousands of protocols with detailed yield and risk analytics

Lending positions

LP tokens

Staking rewards

Protocol coverage

DeFi Docs

Wallet Transactions

Transaction history with context

/wallets/{address}/transactions

Access enriched transaction data with smart contractinteraction details

Decoded transactions

DeFi interactions

Filters

Transactions Docs

Transaction Subscriptions

Real-time wallet monitoring

/tx-subscriptions

Subscribe to wallet activities with real-time notifications and custom triggers

Instant notifications

Custom filters

Webhook delivery

Subscriptions Docs

Wallet PnL

Profit & loss analytics

/wallets/{address}/pnl

Track portfolio performance with detailed profit and loss calculations

Realized gains

Unrealized PnL

Net Invested Amounts

Transactions Docs

Need custom endpoints?

Our API is designed for flexibility. Request custom data aggregations, specialized analytics, or enterprise-specific endpoints.

Contact API Team

Trusted by Leading dApps, Wallets, and Enterprises

Use the API that powers apps for 1000,000+ users.

our benefits

Why Choose Our Ethereum API?

Lightning-Fast Freshness

Data updates within milliseconds of new blocks.

Battle-Tested Reliability

Used by apps serving millions of onchain users.

Easy
Integration

Add blockchain data to apps without any backend work

Start for Free

robust foundation

Ethereum Network Snapshot

Ethereum is the leading smart contract platform with the largest ecosystem of tokens, NFTs, and DeFi. Read wallet data, tokens, prices, and transactions via a single, production-ready schema.

Key features

- Unified balances and portfolio across protocols
- Token/NFT metadata and price aggregation
- Consistent schema used across multiple chains
- Low-latency endpoints for real-time experiences

Mainnet

NETWORK STATUS

15s

BLOCK TIME

$94B

TOTAL VALUE LOCKED

$0.50

AVG GASS FEE

Enterprise infrastructure

Built for Consumer Scale and Enterprise Reliability

Powering applications from startups to fintech companies with infrastructure that scales seamlessly and delivers consistently.

1000+

RPS

SLA

Guaranteed

99.9%

Uptime

Enterprise infrastructure

Infrastructure Built to Scale

No items found.

Crosschain

Built for Consumer Scale and Enterprise Reliability

26+

Supported Chains

Explore all chains

Pricing Tiers

Simple, Transparent Tiers

Start building for free. Upgrade as you scale.

Developer

$0/ forever

For solo builders and teams who want to test before scaling.

Key features:

3K requests/day

2 RPS limit

Local development only

Community support

Get Started Free

Builder

$99/ month

For growing teams who want to move fast

Key features:

Up to 200K requests/month

10+ RPS

Production-ready API keys

Telegram/Email support

Start Building

Real results from teams shipping with Zerion API

Wallets & DeFi

Rainbow, Kraken, Backpack & Infinex

LEARN MORE

AI Agents

HeyElsa, Ask Gina, Loomlay & Kirha.ai

LEARN MORE

Consumer

OpenSea, Farcaster, Surrapp, Privy & Para

LEARN MORE

Crypto Accounting & Institutional Infra

Waltio, Kubera, P2P.org & CMT Digital

LEARN MORE

Testimonials

Trusted by Industry Leaders

Join thousands of satisfied developers who trust our APIs for their mission-critical applications.

"We love Zerion API because it made it easy to add recent activity to Web3Modal without the need to run our own infrastructure. Their API works across 18+ networks and also includes NFTs besides transactions."

Derek Rein

CTO of WalletConnect

"It was effortless for our engineers to build Rainbow's UX integrating Zerion API for transactions and positions data. Their infra has handled our load seamlessly!”

Jin Chung

Co-Founder of Rainbow Wallet

"Zerion's multi-chain wallet API gives our AI agents the ability to understand users' complete portfolios across all major networks. This visibility enables personalized experiences for blockchain users.”

Founder of Heurist.ai

"Zerion API helped us reduce the latency in fetching the user portfolio significantly. Since Elsa enables users to write or speak a prompt, getting portfolio details in seconds is magical."

Hey Elsa Team

"Zerion API is a swiss army knife for blockchain agents, delivering sophisticated aggregation of wallet analytics like cross chain PnL through one unified API call. Integrating them into our MCP aggregator empowers AIs with comprehensive, real time blockchain intelligence."

Pierre

CEO & Founder of Kirha

"Zerion API has been powering our EVM data since day one, fueling everything from enriched transactions to NFT positions and charts. It
helped validate key wallet use-cases well before Warpcast Wallet even existed."

Varun Srinivasan

Co-Founder of Farcaster

"We've worked with Zerion API since day zero even before we launched Uniswap Wallet. From multichain positions to custom labels and EIP-7702 batching support, theyʼve been a key partner across every wallet update."

Noah Citron

Engineering Lead of Uniswap Wallet

"Zerion’s portfolio and APIs are integral to Infinex’s cross-chain experience. Their infra gives us the speed and reliability needed for real-time crypto UX."

Kain Warwick

Founder of Infinex & Synthetix

"Zerion’s transaction and portfolio APIs power Privy’s wallet experience - everywhere we show wallet balances in the dashboard is powered by Zerion. Their reliable data has given our engineers the speed and reliability to deliver a core part of Privy's value to developers."

Max

COO of Privy

Ready to Build the Future?

Join the thousands of developers already building on our platform. Start with our free tier and scale as you grow.

Start Building for Free

No credit card required • 5 minute setup • 24/7 support

If you have any questions

FAQ

What can I build with the Ethereum API?

Ethereum wallets, portfolio trackers, neobanks, analytics tools, and consumer apps using normalized read endpoints.

What data can I fetch?

Balances, portfolio (DeFi/NFT), token metadata & prices, and transaction history for any address.

Is this different from running my own node?

Yes. Zerion API abstracts node ops, indexing, and caching so you can focus on product.

Will my integration work on other chains?

Yes. Zerion API shares the same schema across all supported chains to reduce complexity.

How do I start?

Create a Zerion API key and call balances for a known Ethereum address, then fetch portfolio and transactions.

Still have questions?

Can't find the answer you're looking for? Our support team is here to help.

Contact Support Join Community

Close Cookie Popup

Zerion Uses Cookies

We use them to improve your experience and analyze traffic. Customize your preferences anytime. See our cookie policy for details.

Customize

Save