Avalanche API

Avalanche is an open-source platform offering decentralized application development within an interoperable and scalable ecosystem. Its robust consensus mechanism ensures near-instant transaction finality.

Networks Mainnet
Released 2020
Consensus Avalanche Consensus
Smart contracts Yes
Block time ~2 seconds
Smart contract language(s) supported Rust, Solidity
Get started with Avalanche

Bitcoin
Ethereum
XRP Ledger
Ethereum Classic
Bitcoin Cash
Dash
Litecoin
Dogecoin
Zcash
View all supported

The Avalanche API — build without running a node

Access Avalanche blockchain data through one unified REST API: transaction and address data, balances, block data, and real-time webhooks for on-chain events — with no Avalanche node to run and maintain. Start free and scale as you grow.

Blockchain data

Read Avalanche transactions, addresses, balances, UTXOs, and block data through one REST API.

Real-time webhooks

Subscribe to on-chain events — incoming and outgoing transactions, confirmations, and mined blocks.

No node to run

Skip the infrastructure — managed, always-synced access with no node to operate or maintain.

View the API docs Start building free

Building a full wallet? Explore HD Wallets.

Need prices too? See the crypto price API, or run your own Avalanche RPC nodes.

What makes Avalanche unique?

Avalanche is an open-source blockchain protocol enabling decentralized application development within an interoperable, decentralized, and highly scalable ecosystem. Its robust consensus mechanism makes it the first ecosystem tailored for global finance, ensuring near-instant transaction finality.

Frequently Asked Questions

Which blockchain does Avalanche run on?

Avalanche settles on Avalanche. Tokens live in their own contracts rather than in the account balance, so reading them means calling the token contract; and every transaction needs the account's next nonce, which the same API returns.

What kind of chain is Avalanche?

It is an account-model EVM chain — every address has a single balance and a nonce.

Can I test Avalanche without spending real funds?

Yes — the same endpoints serve Avalanche's Fuji testnet, so you can build and verify an integration end to end before you touch mainnet.

How do I read Avalanche balances and transfers?

Use Address Latest for current state and recent activity — it needs no setup and answers for roughly the last 14 days. For a full history, Address History requires the address to be synced first, which then bills per address per day for as long as it stays synced.

What does reading Avalanche data cost?

It depends on the endpoint family rather than on Avalanche itself: single-record calls are charged per request, while list endpoints are charged per page returned, and a synced address adds a daily monitoring charge. The pricing calculator has the current per-chain figures.