World Chain API
Enterprise-grade World Chain wallet data — balances, positions, transactions, NFTs, and PnL — across World Chain and 50+ chains in one API.
curl --request GET \--url 'https://api.zerion.io/v1/wallets/{address}/positions/?currency=usd' \--header 'accept: application/json' \--header 'authorization: Basic <API_KEY>'
World Chain Network Snapshot
Ethereum L2 built on the OP Stack within the Optimism Superchain by Tools for Humanity, the team behind World (formerly Worldcoin). Users verified with World ID proof-of-personhood get priority blockspace and a free gas allowance, keeping bots from crowding out real users.
Key features
World Chain API endpoints
Portfolio Data
Track World Chain tokens, NFTs, and balances across World Chain & 50+ chains with a single call.
One API, every major chain
World Chain, Ethereum, Base, Solana, Arbitrum and 45+ more networks — queried in a single call.
Ethereum
Base
Solana
Arbitrum
OptimismEthereumBaseSolanaArbitrumOptimismEthereumBaseSolanaArbitrumOptimismEthereumBaseSolanaArbitrumOptimismEthereumBaseSolanaArbitrumOptimismEthereumBaseSolanaArbitrumOptimism
Polygon
Avalanche
BNB Chain
Robinhood
Linea
ScrollPolygonAvalancheBNB ChainRobinhoodLineaScrollPolygonAvalancheBNB ChainRobinhoodLineaScrollPolygonAvalancheBNB ChainRobinhoodLineaScrollPolygonAvalancheBNB ChainRobinhoodLineaScrollPolygonAvalancheBNB ChainRobinhoodLineaScroll
Zora
Celo
Gnosis
Fantom
Aurora
HyperEVMZoraCeloGnosisFantomAuroraHyperEVMZoraCeloGnosisFantomAuroraHyperEVMZoraCeloGnosisFantomAuroraHyperEVMZoraCeloGnosisFantomAuroraHyperEVMZoraCeloGnosisFantomAuroraHyperEVMWhy Choose Our
World Chain API?
Ship faster
Go live in minutes, not months
Grab a free key, paste one request, and you're serving portfolio data. No nodes, no indexers, no infra to maintain.
Speed
Fast everywhere your users are
A globally cached edge keeps every query fast, so your app feels instant no matter where your users open it.
Freshness
Balances update in seconds
Balances, positions, and transactions land within seconds of confirmation. Never stale, never guessing.
Scale
Scale from one user to millions
One request spans Solana, Ethereum, Base and 50+ chains. The same endpoint carries your first user and your millionth.
Built for Consumer Scale and Enterprise Reliability
Powering applications from startups to fintech companies with infrastructure that scales seamlessly and delivers consistently.
Stay ahead with the Zerion API
New endpoints, chains, and webhooks — straight to your inbox.
Simple, transparent tiers
Start building for free. Upgrade as you scale.
For early prototypes and proofs of concept
Get Started Free- 2K requests / day
- 3 RPS limit
- Chat widget
- Best effort support
For shipping MVP without running any infrastructure
Start building- Up to 250K requests / month
- 15 RPS
- Telegram group
- Priority support
For apps preparing for launches or already in production
Start building- Up to 1M requests / month
- 50 RPS
- Slack or Telegram channel
- Priority support
For scaling products with growing traffic demands
Start building- Up to 2.5M requests / month
- 100 RPS
- Slack or Telegram channel
- 24/7 support
For scale-ups & enterprises with high volume or custom needs
Contact sales- 2.5M+ requests / month
- 1,000+ RPS
- Slack or Telegram channel
- 24/7 support
- 99.9% uptime SLA
- Dedicated account manager
What can you build?
Wallets & Stablecoins
Power portfolio views, transaction history, and in-app swaps with one API — across every chain and stablecoin your users hold.
Fintech & Neobanks
Add portfolio charts, PnL, and transaction history to your app — no blockchain node to stand up, no infra to maintain.
AI Agents
Wallet holdings, DeFi positions, and PnL in a single call. Pay per request with x402 on Base — no subscriptions, no keys.
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Trusted by the companies you know
From multichain wallets to onchain apps — teams build on Zerion API.
“Zerion API powers Kraken 2.0 with reliable token balances, P&L, and transaction history through one consolidated integration, making it easier to scale to more users.”
“We've worked with Zerion API since day zero, even before launching Uniswap Wallet. From multichain positions to EIP-7702 batching, they've been key partners.”
“Add a fresh customer quote here — pulled from the cleaned-up testimonials doc.”
“Add a fresh customer quote here — pulled from the cleaned-up testimonials doc.”
Built for developers.
Trusted by enterprises.
Give wallets, AI agents, and consumer apps reliable access to wallets, positions, transactions, and DeFi data across chains.
FAQ
If you have any questions