Free Crypto API

Everything you need to start building — blockchain data, market prices, and wallet infrastructure across 20+ chains, free to get started.

CryptoAPIs gives developers a free tier to build on real blockchain data — transaction and address data, market prices, HD wallets, and webhooks — through a single REST API across Bitcoin, Ethereum, and 20+ other blockchains. No infrastructure to run, no credit card to start.

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
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One integration. Infinite possibilities

Get access to over 100+ endpoints using a single point of integration.

Get Address Balance
GET
Get Transaction Details
GET
List Token Transfers
GET
Get Last Mined Block
GET
Get Exchange Rate
GET
Get Fee Recommendations
GET
Get Address Balance
GET
View Docs 
{
    "apiVersion": "12-12-2024",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "data": {
        "item": {
            "confirmedBalance": {
                "amount": "82067.283563540186907089",
                "unit": "ETH"
            }
        }
    }
}
{
    "apiVersion": "12-12-2024",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "data": {
        "item": {
            "fee": {
                "amount": "0.000005033963697",
                "unit": "ETH"
            },
            "gasLimit": 21000,
            "gasUsed": 21000,
            "hash": "0x8b8dd253844f60a187abe2a5ed620be34c1687c46e99261c1bda19f7e1b9c8ac",
            "inputData": "0x",
            "positionInBlock": 134,
            "recipient": "0xb423b53d9076b325c0248d62ef74b11adc211020",
            "sender": "0x396343362be2a4da1ce0c1c210945346fb82aa49",
            "status": "0x1",
            "timestamp": 1753492931,
            "value": {
                "amount": "0.000034866036303",
                "unit": "ETH"
            },
            "gasPrice": {
                "amount": "239712557",
                "unit": "WEI"
            },
            "minedInBlock": {
                "hash": "0xe368c631c74a82c3043e6d44c4bef6e6139a6501b39c7700c2552554d10e6c3b",
                "height": 23000000
            }
        }
    }
}
{
    "apiVersion": "12-12-2024",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "data": {
        "limit": 50,
        "offset": 0,
        "total": 100,
        "items": [
            {
                "recipient": "0x742d35cc6634c0532925a3b844bc454e4438f44e",
                "sender": "0x2767ae7e0c205425a7b7f7583c512513c527f482",
                "timestamp": 1786226831,
                "fee": {
                    "amount": "0.0006705845441",
                    "unit": "ETH"
                },
                "tokenData": {
                    "name": "Tether USD",
                    "symbol": "USDT",
                    "contractAddress": "0xdac17f958d2ee523a2206206994597c13d831ec7",
                    "fungibleValues": {
                        "amount": "102817905.785658",
                        "decimals": 6
                    },
                    "standard": "ERC-20"
                },
                "transactionHash": "0xa83bee3d42d2b2235c569ddfba2cffe8ead546c483e8d93fff04cee843b12806",
                "minedInBlock": {
                    "hash": "0xaca043b0df333aa22ec745321d70bd5f35fbdd1b27c869483c864aa278357492",
                    "height": 25681809
                }
            }
        ]
    }
}
{
    "apiVersion": "12-12-2024",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "data": {
        "item": {
            "bits": 386020669,
            "chainwork": "00000000000000000000000000000000000000013ee38348e7119b5995a32246",
            "difficulty": 127479855693691,
            "merkleRoot": "9974f8196763a5f073efee306cfe2282804b26418473faced9e98a3ac286da59",
            "size": 1762986,
            "version": 576946176,
            "hash": "00000000000000000000b8f8c9ce662619f05211df6671e6433387fe942c828d",
            "height": 962141,
            "previousBlockHash": "000000000000000000018f00f53340b75f082813c942da4aadf2e3d0d73ec5b6",
            "strippedSize": 743228,
            "timestamp": 1786534719,
            "transactionsCount": 4165,
            "versionHex": "22638000",
            "weight": 3992670
        }
    }
}
{
    "apiVersion": "12-12-2024",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "data": {
        "item": {
            "calculationTimestamp": 1786536060,
            "fromAssetId": "630629f84e66ce0983f2cd4e",
            "fromAssetSymbol": "BTC",
            "rate": "64194.614794354995",
            "toAssetId": "630629694e66ce0983f2cd4b",
            "toAssetSymbol": "USD"
        }
    }
}
{
    "apiVersion": "12-12-2024",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "data": {
        "item": {
            "fast": "157453250",
            "slow": "136246330",
            "standard": "137697303",
            "unit": "WEI"
        }
    }
}
View Docs

What we support

Mainnets and Testnets

Blockchains
BTC

Bitcoin
ETH

Ethereum
XRP

XRP Ledger
ETC

Ethereum Classic
BCH

Bitcoin Cash
DASH

Dash
LTC

Litecoin
DOGE

Dogecoin
ZEC

Zcash
BSC

BNB Smart Chain
MATIC

Polygon
TRX

TRON
SOL

Solana
AVAX

Avalanche
OPTIMISM

Optimism
kas

Kaspa
View all supported
View all supported

Tether
Chainlink
USD Coin
Aave
View all supported

ERC-20
ERC-721
TRC-20
TRC-721
BEP-20
View all supported

What are you up to?

Our powerful blockchain product suite helps businesses and institutions build the ecosystem of tomorrow.

View all use cases
Crypto Wallet
Hardware Wallet
Crypto Exchange
Crypto PSP
Digital Banks
Crypto Lending
Crypto Custody
Crypto Taxes & Accounting

Infrastructure optimized for growth

30+

Networks Supported

25ms

Avg Processing Time

25,000+ rq/s

Enterprise-ready

100+ TB

of Big Data

See how it works

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