Non-Custodial Wallets

Open-source Node.js SDK library

It's an open-source Node.js software that provides full control of master private keys, master seeds, and mnemonics.

The SDK is an on-premise solution for operating with digital assets, creating HD wallets and signing transactions locally without a network connection.

It is integrated with Crypto APIs product suite as an option by default, which provides endpoints for syncing HD wallets (xPub, yPub, zPub), deriving wallet addresses, getting fee recommendations, preparing transactions, broadcasting locally signed transactions, and more.

Full control of private keys
Secure offline signing
Unlimited scalability
View it on GitHub

HD Wallet Management with Crypto APIs Endpoints

A collection of powerful endpoints to securely manage wallet addresses and transactions.

Sync New HD Wallet (xPub, yPub, zPub)
POST
List Synced Addresses
GET
Derive And Sync New Receiving Addresses
POST
Derive And Sync New Change Addresses
POST
Prepare A UTXO-Based Transaction From HD Wallet (xPub, yPub, zPub)
POST
Prepare An Account-Based Transaction From HD Wallet (xPub, yPub, zPub)
POST
Broadcast Locally Signed Transaction
POST
List HD Wallet (xPub, yPub, zPub) Transactions
GET
Get HD Wallet (xPub, yPub, zPub) Assets
GET
Sync New HD Wallet (xPub, yPub, zPub)
POST
View Docs 
{
    "apiVersion": "2021-03-20",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "data": {
        "item": {
            "extendedPublicKey": "upub5Ei6bRNneqozk6smK7dvtXHC5PjUyEL4ynCfMKvjznLcXi9DQaikETzQjHvJC43XexMvQs64jxB1njMjCHpRZ4xQWAmv3ge9cVtjfsHmbvQ"
        }
    }
}
{
    "apiVersion": "2021-03-20",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "data": {
        "limit": 50,
        "offset": 0,
        "total": 100,
        "items": [
            {
                "address": "0x9e91eb3a35b96f0f0fe71f3c17fe8d29eb406b16",
                "index": 1
            }
        ]
    }
}
{
    "apiVersion": "2021-03-20",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "data": {
        "limit": 50,
        "offset": 0,
        "total": 100,
        "items": [
            {
                "address": "tb1qupysufr3palqvz08hk7seglvskkvah9hmt66s7",
                "addressFormat": "P2WPKH",
                "addressType": "change",
                "derivationType": "bip32",
                "index": "1"
            }
        ]
    }
}
{
    "apiVersion": "2021-03-20",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "data": {
        "limit": 50,
        "offset": 0,
        "total": 100,
        "items": [
            {
                "address": "tb1q2sy5l2vn4p648g3ttjxegghp6w9nycvdxap4ef",
                "addressFormat": "P2WPKH",
                "addressType": "change",
                "derivationType": "bip32",
                "index": "1"
            }
        ]
    }
}
{
    "apiVersion": "2021-03-20",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "data": {
        "item": {
            "additionalData": "yourAdditionalDataHere",
            "fee": "0.0000279",
            "feePerByte": "0.00000014",
            "locktime": 1781965,
            "replaceable": false,
            "size": 243,
            "vin": [
                {
                    "address": "tb1q8wus03xdv3t6aknmsnpd0jmeu7dgh93j34pj5a",
                    "change": 0,
                    "derivationIndex": 1,
                    "outputIndex": 1,
                    "satoshis": 10000,
                    "script": "00143bb907c4cd6457aeda7b84c2d7cb79e79a8b9632",
                    "sighash": "90cfeef03b2755586b8e81668d8009b16b34d48abf2968729892279222e8d893",
                    "transactionId": "ff59ac56616ece7498e62c7f9f957cfdd50f6f2a74402058154e3022e7617bf2"
                }
            ],
            "vout": [
                {
                    "address": "tb1qvx3fynjuctk475vgecetfck005fxh699mflshv",
                    "satoshis": 3094,
                    "script": "0014a3f1019940ce572681c43fd836db97036a85bc8f"
                }
            ]
        }
    }
}
{
    "apiVersion": "2021-03-20",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "data": {
        "item": {
            "amount": "30000000000000",
            "dataHex": "0x0079006f00750072004100640064006900740069006f006e0061006c00440061007400610048006500720065",
            "derivationIndex": 0,
            "fee": {
                "gasLimit": "552020",
                "gasPrice": "2500000007",
                "maxFeePerGas": "2000000008",
                "maxPriorityFeePerGas": "2000000000"
            },
            "nonce": "0",
            "recipient": "0x041c594a0cc194e826bef5411b29c7f27001b7e3",
            "sender": "0x03654A9E78771442CAdf8DB37ae60D6a12bAEa9f",
            "sigHash": "40738814e379fd2b1923729c87ac80dddc6810a3f8f02fef05452251972ec83a",
            "transactionType": "access-list-transaction"
        }
    }
}
{
    "apiVersion": "2021-03-20",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "data": {
        "item": {
            "transactionId": "347d96855d41b77f1e23048fff11c18e9fe699ee69b0b402338f34189734e0a2"
        }
    }
}
{
    "apiVersion": "2021-03-20",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "data": {
        "limit": 50,
        "offset": 0,
        "total": 100,
        "items": [
            {
                "index": 1,
                "minedInBlockHash": "00000000407f119ecb74b44229228910400aaeb9f4e3b9869955b85a53e9b7db",
                "minedInBlockHeight": 1903849,
                "recipients": [
                    {
                        "address": "2MzakdGTEp8SMWEHKwKM4HYv6uNCBXtHpkV",
                        "amount": "0.000144",
                        "isMember": false
                    }
                ],
                "senders": [
                    {
                        "address": "2N5PcdirZUzKF9bWuGdugNuzcQrCbBudxv1",
                        "amount": "0.00873472",
                        "isMember": true
                    }
                ],
                "timestamp": 1582202940,
                "transactionHash": "1ec73b0f61359927d02376b35993b756b1097cb9a857bec23da4c98c4977d2b2",
                "transactionId": "4b66461bf88b61e1e4326356534c135129defb504c7acb2fd6c92697d79eb250",
                "fee": {
                    "amount": "0.00016932"
                }
            }
        ]
    }
}
{
    "apiVersion": "2021-03-20",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "data": {
        "item": {
            "fungibleTokens": [
                {
                    "amount": "0.100000000000000000",
                    "identifier": "0x101848d5c5bbca18e6b4431eedf6b95e9adf82fa",
                    "symbol": "WEENUS",
                    "type": "ERC-20"
                }
            ],
            "nonFungibleTokens": [
                {
                    "identifier": "0x90ca8a3eb2574f937f514749ce619fdcca187d45",
                    "symbol": "GA",
                    "tokenId": "0x000000000000000000000000000000000000000000000000000000000000195b",
                    "type": "ERC-721"
                }
            ],
            "confirmedBalance": {
                "amount": "0.008516447598774679",
                "unit": "ETH"
            }
        }
    }
}
View Docs

Self-custody solution for key management

We never store your private keys or have access to them. Your keys, your coins.

Explore Self-Custody Wallets

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
ZIL

Zilliqa
ZEC

Zcash
BSC

BNB Smart Chain
MATIC

Polygon In development
TRX

TRON
XLM

Stellar In development
XTZ

Tezos In development
NEAR

NEAR In development
View all supported
View all supported

Tether
Chainlink
USD Coin
Uniswap
Wrapped Bitcoin
Aave
Synthetix
Dai
Cronos
Maker
Celsius
Compound
View all supported

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

Custodial or non-custodial?

Flexibility to choose whether you keep the private keys or give them to your customers.

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

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

Frequently Asked Questions

Company

What is Crypto APIs?

Crypto APIs is a blockchain infrastructure layer that radically simplifies the development of blockchain and crypto related applications by providing all needed blockchain APIs. We provide fast, reliable, and unified API solutions to access real-time and historical data from crypto market and blockchain protocols.

What products does Crypto APIs offer?

Crypto APIs is a set of blockchain- and crypto-related products which can help you reduce your development and infrastructure costs. It's an infrastructure layer which significantly reduces your go to market time. - Wallet as a Service - an MPC digital wallet that incorporates the best features, security and authorization processes on the market. - Blockchain Data - Unified access to complex and dynamic blockchain data from a single point using REST APIs. - Blockchain Events - monitor and be notified for webhooks on top blockchain protocols using unified requests and callbacks - Node as a Service - shared and dedicated node infrastructure for top blockchains using JSON-RPC. - Key Management System - open-source key management system for secure HD wallet generation and storing of private keys. - Blockchain Tools - a collection of API endpoints that provide an easy connection with blockchains and perform certain operations. - Blockchain Automations - forward automatically any received coins or tokens to a preferred main deposit address. - Market Data - real-time market data from top crypto exchanges in one place.

Who are our intended customers?

Crypto APIs product suite has multiple use cases. Our infrastructure is designed to best serve any SMEs, enterprises or crypto-enthusiasts who need quick, secure and reliable access to top blockchain nodes. You can check our website to see the crypto and blockchain products that we offer and for any questions, don't hesitate and contact our team.

Which blockchains networks are supported?

Crypto APIs supports the following blockchains for both testnet and mainnet: - Bitcoin - Ethereum - XRP - Litecoin - TRON - Bitcoin Cash - Dash - Dogecoin - Ethereum Classic - Zilliqa - Zcash - Binance Smart Chain Check out our dedicated page with all supported blockchains, layers, tokens and exchanges.

Do you support testnet networks?

Yes, we support testnet networks for mutiple blockchains. We also offer a free subscription plan to be used over testnet networks.

Do you use one node per network?

We have a pool of nodes that we use, all hosted with us. If it happens one to go offline, there is always another one that will continue processing.

Do you use your own nodes or shared ones?

We don’t use shared nodes. The pool of nodes we use is owned by Crypto APIs.

How can I contact support?

You can contact our support team via Live Chat or Support Email. When you contact us, please use the email address associated with your Crypto APIs account, or the email added as a Team member in another Crypto APIs account.

Do you offer a free plan/trial/demo for Crypto APIs?

We do not offer trial or demo for Crypto APIs products. We do however offer a free subscription instead, which can be used over testing networks.

Can I use more than one Crypto APIs product at once?

Of course. It's an all in one subscription.

I need more custom settings for my subscription, is it possible?

Yes. We have a Custom option for subscription. To set it up you can directly discuss it with one of our representatives by contacting our team.

How can I pay for the service?

We accept payment methods such as debit and credit cards (Visa, MasterCard) by using our payment provider Stripe. We can also offer you an alternative way to pay for your subscription plan, such as wire transfers, pay with cryptocurrency or PayPal. For more information, contact our business development team at [email protected]

Are payments for Crypto APIs services recurring?

Are payments for Crypto APIs services recurring?

Can I prepay for my subscription for longer?

Yes. For that purpose you can contact our team so that we can discuss how and for what period of time you would like to make your payment.

Do you offer discounts?

We may offer you a discount depending on your subscription. Only larger packages and subscriptions for a longer period of time (yearly) can apply for a discount. If you think your subscription is eligible for a Crypto APIs discount, contact our team right away!

What is “Rate per second”?

This rate sets a limit for requests that can be made per second. The default equals 10, which means at most 10 requests can be done in a second. Still, this logic does not apply to all time frames. For 1 minute time you can use up requests equal for max 30 seconds, which means that 1 minute allows max 300 requests. The same logic goes for 1 hour, where you can use up requests equal for max 30 min, which means 9 000 requests.

How many credits does an endpoint cost?

You can see the credits cost for each endpoint in our official Documentation. Simply select the endpoint you want information for and the credits cost is displayed at the end of the page.

You might also be interested in

Blockchain Automations
Blockchain Tools
Node as a Service
Blockchain Events
Blockchain Data