# Free Crypto API

## Start building with blockchain data — free

CryptoAPIs offers a free tier so developers can start building on real blockchain data without running any infrastructure. Get transaction and address data, market prices, HD wallets, and webhooks through a single REST API across Bitcoin, Ethereum, and 20+ other blockchains. No credit card required to start; upgrade to a paid plan as your usage grows.

- **Free tier with real blockchain data** — no credit card required
- **One API, 20+ blockchains** — Bitcoin, Ethereum, and more
- **Scale when ready** — upgrade to paid plans as your usage grows

## What you can build for free

The free tier gives access to the same unified REST API used in production. Common starting points:

### Blockchain data

Read transaction and address data across UTXO, EVM, and other supported chains — balances, transaction history, block data, and token holdings — without operating your own nodes.

### Market data

Get current asset prices, supply and market-cap stats, token contract addresses across protocols, and asset-to-asset exchange rates (CoinMarketCap-sourced). Note: market data covers current prices and rates — it does not include OHLCV/candlesticks or per-exchange order-book data.

### HD wallets

Generate and manage hierarchical-deterministic (HD) wallets — derive addresses, sync balances, and track deposits — through the API instead of building wallet infrastructure yourself.

### Webhooks & blockchain events

Subscribe to on-chain activity (incoming/outgoing transactions, confirmations, mined blocks, token transfers) and receive webhook notifications, so your app reacts to blockchain events in real time.

## How the free tier works

The free plan is metered in monthly credits — every API request consumes credits based on the endpoint. Start free, monitor your usage in the dashboard, and upgrade to a paid plan when you need more credits or higher throughput. See the [Pricing page](https://cryptoapis.io/pricing) for the full per-tier feature matrix and credit quotas, and [Custom plan](https://cryptoapis.io/custom-plan) for bespoke or high-volume needs.

## Get started

Create a free account, generate an API key, and make your first call in minutes. [Start free](https://app.cryptoapis.io/auth/register) or explore the [technical documentation](https://developers.cryptoapis.io/) to see every endpoint.