Get real-time, reliable data across any chain.
A blazing-fast multi-chain indexer with balances, prices, contract events and webhooks to power your project.
Get real-time, reliable data across any chain.
A blazing-fast multi-chain indexer with balances, prices, contract events and webhooks to power your project.
Works with any EVM Chain
Power essential web3 use cases with real-time data
Get all token balances for an account from any EVM chain instantly
Fetch wallet balances in < 300ms with a single API request across all EVM chains
Run off-chain workflows from contract-triggered webhooks
Fetch all unique tokens from a contract, including total supplies
Track stablecoin asset balances onchain
Query the blockchain in real-time
- Balances
- ERC20, ERC721, and ERC1155 token balances, including native tokens. Includes price data and collectibles per account.
- Transactions
- Transaction history and receipts, with support for filters.
- Events
- Contract-specific and address-specific event logs (topics), with support for subscription endpoints.
- Metadata
- Token and contract metadata including name, symbol, images, traits, attributes, and properties.
- Supplies
- Token supplies per token ID and per contract.
USDC on ArbitrumWhy developers love it
Fast & Reliable
99.99% availability. Optimized architecture ensures 3x faster response compared to alternatives.
💯 token coverage
All ERC20/721/1155s indexed across EVMs, with standards-aware metadata bundles and token images.
Price data built in
Get price-aware balances out of the box, with USD values. No need to wire up third party pricing services.
Easy to integrate
Use straightforward REST endpoints or our SDKs, and wire webhooks to your backend in minutes.
Trusted by top builders, backed by web3 leaders
Developers building with Sequence have the support of major ecosystems, partners, and investors - from Arbitrum to Coinbase to Polygon.
Questions & Answers
Ready to build? Plug in your API key, call GetTokenBalancesSummary, and ship your first priced portfolio view in minutes. Then add webhooks or subscriptions for real-time updates.
What chains do you support?
We support a wide range of EVM mainnets and testnets. Check the live networks list on our status page.How fast is the Indexer?
Cached reads are under 300ms; fresh onchain events are surfaced in under a second.Can I get token/NFT metadata with my balance calls?
Yes. return ERC721/1155 metadata in-line, or use the Metadata API for direct queries and refreshes.Do you support real-time notifications?
Yes! Subscribe to receipts/events via RPC or configure webhooks to your backend.How do you prevent spam tokens?
Indexer uses multiple sources to verify valid tokens, and by default only returns verified tokens in responses. You can force the requests to include unverified tokens as well. Any contract deployed through Sequence Builder is automatically verified, and you can also submit a PR to our Token Directory to get your token verified.