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Access to full transaction data on all transactions & addresses
Broadcast and verify transactions with real-time monitoring
Retrieve blockchain data, balances, and transactions
Detailed blockchain history and transaction data for any address.
Full smart contracts metadata, including token symbols & token names
Dedicated nodes infrastructure for leading blockchains using JSON-RPC
Address validation, encoding & cryptographic tasks optimizations
Shared node infrastructure for top blockchains using JSON-RPC.
Real-time notifications for events on top blockchains. Response under 100ms.
AML address screening across 20+ blockchains
14 MCP servers + n8n MCP client for AI agents
Precise blockchain transaction fee estimates based on transaction priority
Sync and manage HD wallets, keys and addresses
Prepare EVM transactions, including token transfers
Access to full transaction data on all transactions & addresses
Get live crypto prices, exchange rates, supply and token contracts across protocols via one REST API.
Test EVM transactions, optimize gas fees and identify security flaws
Ship a wallet where users keep their own keys. Generate an HD wallet, derive addresses from the extended public key, track balances and transactions across 20+ chains, and move funds by signing offline — all without running a node or ever holding a private key on your servers.
A wallet is more than a keypair. It needs fresh addresses on demand, live balances, transaction history, and a safe way to send — across every chain you support, surviving reorgs and re-syncs.
CryptoAPIs gives you that layer non-custodially: you hold the keys, we index the chain. You derive addresses from your extended public key (xPub), read balances and history over one API, and build transactions the user signs offline. Keys are generated and used only in your app or on the device.
Create the HD wallet in your app (any BIP-32/39/44 library) and take its extended public key (xPub). Because an HD wallet can hold many addresses and transactions, CryptoAPIs indexes it up front — so sync the xPub once first, and it's then kept up to date for fast lookups. Only the public key is sent.
Once synced, derive receiving addresses from the xPub so each user or deposit gets a fresh, tracked address — still using only the public key.
Read the wallet's aggregated balance and per-address history over the API, and subscribe to webhooks (see Create Subscriptions) for incoming payments so the wallet updates in real time — no node, no indexer.
To move funds, prepare an unsigned transaction directly from the HD wallet (the API selects inputs across the wallet's derived addresses and calculates fee and change), sign it offline with the user's key — for example with our open-source @cryptoapis-io/offline-signer — then broadcast the signed result.
The same HD-wallet flow covers native coins and tokens (ERC-20, TRC-20 and more): derive, track and sweep with the matching endpoints. Build once, support Bitcoin, Ethereum, stablecoins and 20+ chains behind a single integration — see Wallet as a Service.
Generate an HD wallet in your app, derive receiving addresses from its xPub, and use CryptoAPIs to track balances and transactions and to prepare transactions for offline signing — across 20+ blockchains, with no node to run.
No. Keys are generated and held in your app or on the user's device; CryptoAPIs only ever sees the extended public key and public on-chain data. Every send is signed offline, so it's fully non-custodial.
A hierarchical deterministic (HD) wallet derives many addresses from one seed. Its extended public key (xPub/yPub/zPub) can derive receiving addresses without exposing any private key — which is what lets CryptoAPIs track a wallet non-custodially.
Bitcoin, Ethereum, BSC, Polygon, XRP, Litecoin, Dogecoin and 20+ others, all through the same unified API and HD-wallet model.
Derive addresses, track balances and sign offline across 20+ chains — non-custodial, on a free tier.
