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Access to full transaction data on all transactions & addresses
Retrieve blockchain data, balances, and transactions
Detailed blockchain history and transaction data for any address.
Full smart contracts metadata, including token symbols & token names
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.
Real-time notifications for events on top blockchains. Response under 100ms.
AML address screening across 35+ networks
Sync and manage HD wallets, keys and addresses
Local signing for EVM, UTXO, Tron, XRP, Kaspa and Solana
Precise blockchain transaction fee estimates based on transaction priority
Broadcast and verify transactions with real-time monitoring
Prepare EVM transactions, including token transfers
Test EVM transactions, optimize gas fees and identify security flaws
Pay for HTTP APIs, or charge for your own, in USDC stablecoin over the open x402 protocol — non-custodial, on-chain settlement.
MCP servers, CLI and skills for AI agents
Dedicated nodes infrastructure for leading blockchains using JSON-RPC
Address validation, encoding & cryptographic tasks optimizations
Shared node infrastructure for top blockchains using JSON-RPC.
Prepare Transactions allows for the quick and easy preparation of EVM-based transactions, supporting both fungible and non-fungible token transfers from any address. This service is designed to assist developers in efficiently and securely preparing transactions within the Ethereum-based blockchains.
Create native transaction
Create token transfer
Create non-fungible transfer
Wallets, exchanges, payment processors and compliance teams run on this API. Find the one closest to what you do and see which products it uses.
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Pick a time for a 30-minute call. We will walk through this API against the chains and volumes you are building for.
No. The Prepare Transactions endpoint is EVM-only, covering Ethereum and other EVM-based blockchains. There is no prepare route for Solana, Bitcoin, or other UTXO/non-EVM chains on this product.
Yes, both. The Prepare Transactions API supports native EVM coin transfers as well as fungible token (ERC-20) and non-fungible token (NFT) transfers from any address. It builds the unsigned transaction payload ready for you to sign locally.
Prepare the unsigned EVM transaction with Prepare Transactions, sign it, then submit it with the Broadcast Signed Transaction endpoint. You can also estimate gas costs beforehand using the EVM Blockchain Fees endpoint.
Yes. CryptoAPIs provides an EVM Blockchain Fees endpoint to retrieve current fee estimates so you can set gas parameters before signing and broadcasting. This pairs directly with the Prepare Transactions workflow.
Yes. CryptoAPIs offers an EVM transaction simulation endpoint that lets you preview the outcome of a transaction before it is signed and broadcast. This helps you catch failures or unexpected results without spending gas on-chain.
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