Crypto Exchange

With live and historical data at your fingertips and unified endpoints for anything that happens on the blockchain, you can provide a comprehensive, engaging multi-currency crypto exchange and stay competitive.

We offer crypto exchanges the ability to securely scale operations at a much greater pace, roll out new features quickly, and expand token support while saving on operational and development costs.

100+ REST APIs
35+ Networks
99.99% Uptime
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Some of the features you can use

Generate addresses & create transactions

Using our HD Wallets you can generate multiple deposit addresses from an xPub, organize the deposit and withdrawal processes, and support multiple cryptocurrencies and tokens — the keys stay on your own infrastructure.

Notifications on demand

With Blockchain Events you can subscribe to get notifications for specific events. Set up webhooks for new mined block, new incoming/outgoing confirmed transactions for tokens and coins, and more.

Broadcast signed transactions

Broadcast a transaction that has been already signed locally using our dedicated API endpoint in Blockchain Tools and we will keep you posted about the status by sending you a callback with a success or failure status.

Obtain information on balances & fees

Blockchain Data delivers unified data on anything happening on the blockchain. Get balances, list confirmed and unconfirmed transactions by address, get details by block hash and height, or fee recommendations based on Mempool data.

The benefits of using Crypto APIs

Developed to save time. Designed to be robust.

Save on development time

Leverage the power of a proven blockchain infrastructure trusted by industry leaders. Integrate once, go to market in days.

Reduce maintenance costs

Our flexible pricing plans offer the best cost to performance ratio. Get access to full product suite and features. Upgrade or downgrade anytime.

Enterprise-grade security

We apply encryption to REST, encryption to memory, and encryption in transit on all sensitive data. We are fully ISO 27001 certified.

All-in-one dashboard

One dashboard for all of your crypto operations. Get API keys, generate addresses, setup webhooks, monitor failed requests, callbacks and more.

How to run exchange deposits and withdrawals

1

Address per user

Derive a deposit address for every account from an xPub.

2

Credit on confirmation

A webhook tells you when a deposit confirms, so you credit once and only once.

3

Screen deposits

Run AML checks on the sender before the balance becomes withdrawable.

4

Process withdrawals

Prepare, sign in your own infrastructure, and broadcast — hot-wallet keys never leave you.

You might also be interested in

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Frequently Asked Questions

Blockchain Events

Which blockchains does the CryptoAPIs Blockchain Events API support?

Blockchain Events covers 35+ networks across EVM, UTXO, and account-based networks. The EVM chains are Ethereum, Ethereum Classic, BNB Smart Chain, Polygon, Avalanche C-Chain, Tron, Arbitrum, Base, and Optimism. UTXO chains include Bitcoin, Bitcoin Cash, Litecoin, Dogecoin, Dash, and Zcash, plus XRP, Solana, and Kaspa. Both mainnet and testnet networks are available for most chains.

Does the Blockchain Events API support Solana?

Yes. Solana is a supported chain for Blockchain Events on both mainnet and devnet, alongside XRP and Kaspa. You can subscribe to events and receive callbacks for Solana activity through the same unified subscription flow used for the EVM and UTXO chains.

What blockchain event types can I subscribe to?

You can subscribe to confirmed coin (native) transactions, unconfirmed coin transactions, internal transactions, and token transactions for an address, as well as newly mined blocks. Confirmed coin, internal, and token transaction events also offer an each-confirmation variant that fires on every confirmation. For UTXO chains, callbacks report direction (incoming or outgoing) based on input/output address matching.

How are event notifications delivered, and are the callbacks secure?

Events are delivered as HTTPS POST callbacks (webhooks) to a URL you register. The callback URL must use HTTPS and match a domain you verify in the Dashboard beforehand. You can optionally set a callback secret key so each request carries an HMAC-SHA256 x-signature header you can verify, and every callback includes an idempotencyKey so you can safely deduplicate.

What happens if my callback endpoint is down when an event fires?

CryptoAPIs retries failed callbacks with exponential backoff. Each callback allows a 5-second response timeout, and up to 5 retries follow roughly a 5, 10, 20, 40, and 80-minute schedule. If all retries fail, every subscription sharing that event type and callback URL is marked disabled, so you should monitor delivery and re-activate subscriptions as needed.

Which blockchains does the Crypto APIs HD Wallets Management (xPub sync) API support?

The HD Wallet (xPub/yPub/zPub) sync API supports the EVM chains (such as Ethereum, Ethereum Classic, BNB Smart Chain, Tron), the UTXO chains (Bitcoin, Bitcoin Cash, Litecoin, Dogecoin, Dash, Zcash), and XRP. You import an extended public key and Crypto APIs derives and syncs its addresses and transactions for you.

Does the HD Wallets Management API support Solana?

No. HD wallet (xPub/yPub/zPub) sync is not available for Solana. HD wallet coverage is limited to the EVM chains Ethereum, Ethereum Classic, BNB Smart Chain and Tron, the six UTXO chains (Bitcoin, Bitcoin Cash, Litecoin, Dogecoin, Dash, Zcash) and XRP. Solana is supported by other Crypto APIs products such as transactions data and blockchain events, but not by the HD wallet endpoints.

What can I do with a synced xPub through the HD Wallets API?

Once you sync an extended public key you can list all your synced HD wallets, pull the wallet's aggregated assets and balances, retrieve wallet details, and list the wallet's transactions across all derived addresses through a single integration. The sync monitors every derived address for you, so you do not have to track individual addresses manually. Syncing and deleting an xPub each carry a subscription cost, and monitored addresses incur a daily monitoring tax.

Can I derive addresses from an xPub without calling the API or exposing keys?

Yes. Crypto APIs provides address-derivation utilities in the blockchain tools family that generate child addresses from an extended public key for EVM chains, the UTXO chains and XRP. Because HD wallets use extended public keys, derivation and wallet syncing never require your private keys. This lets you generate deposit addresses and reconcile them against a synced wallet.

Is there a free tier, and how is HD wallet usage billed?

Every API request consumes credits, with the exact amount returned in the x-credits-consumed response header and the cost varying by endpoint and blockchain. HD wallet asset and transaction reads on UTXO chains are among the heavier calls (roughly 520-530 baseline credits), and a synced xPub also adds a per-subscription cost plus daily monitoring taxes per derived address. After your monthly credit allocation is exhausted, usage continues automatically under pay-as-you-go billing. The marketing page does not state a specific free-tier allowance.

What is the CryptoAPIs Broadcast Transactions API and how does it work?

It lets you push a transaction you have already signed locally to the blockchain network through a single specialized endpoint. You keep your private keys on your side, sign the raw transaction offline, and CryptoAPIs relays the signed payload to a node for you. This means CryptoAPIs never handles your keys while still giving you node access for broadcasting.

Which blockchains does the Broadcast Transactions API support?

Broadcasting is available across 35+ networks. This covers EVM chains (Ethereum, Ethereum Classic, BNB Smart Chain, Polygon, Avalanche C-Chain, Tron, Arbitrum, Base, and Optimism), UTXO chains (Bitcoin, Bitcoin Cash, Litecoin, Dogecoin, Dash, and Zcash), plus XRP, Solana, and Kaspa.

Does the Broadcast Transactions API support Solana and Bitcoin?

Yes. Solana is supported for broadcasting locally signed transactions, as are Bitcoin and the other UTXO chains (Bitcoin Cash, Litecoin, Dogecoin, Dash, Zcash). XRP and Kaspa are also covered, alongside the EVM chains.

Can I broadcast transactions on testnets as well as mainnet?

Yes. Broadcasting works on both mainnets and testnets across the networks CryptoAPIs supports. For example EVM chains offer testnets such as Sepolia, Amoy, Fuji, Nile and Mordor, and UTXO chains such as Bitcoin, Litecoin and Dogecoin offer their standard testnets. Kaspa is currently mainnet only.

Does broadcasting a transaction with CryptoAPIs mean they hold my private keys?

No. The model is non-custodial for signing: you sign the transaction locally with your own keys and only send the already-signed transaction to the broadcast endpoint. CryptoAPIs relays that signed payload to a node and never sees or stores your private keys.