Build with familiar REST APIs, plus iOS and Android SDKs. Create and manage wallets and transactions, or deploy and interact with smart contracts.
Unlock innovative blockchain functionality
Enable users to access digital currencies, NFTs, and other valuable blockchain-powered experiences easily.
Simplify global transactions
Increase speed and lower costs for users to send and receive money across borders.
Deeper customer engagement
Deliver unique NFT experiences to increase engagement with your users.
Built for developers
More functionality with less code
Blockchain agnostic
Build it once and use it across multiple blockchains with no blockchain-specific code. Currently supports Ethereum, Polygon, and Avalanche, with other chains coming soon.
Flexible infrastructure options
Provide user-controlled or developer-controlled wallets with frictionless Web2 UX. Abstract the complexity of blockchains for users.
Operations monitoring
Troubleshoot your app and better support your users with built-in transaction logs, user-level monitoring, and error reporting. Scale to millions of users with confidence.
Instant access
Sign up with an email address and start building immediately. No upfront fees or contract negotiations. Pay-as-you-go pricing starts at pennies per wallet and decreases as volume grows.
Start with just a
few lines
The id created represents the user’s account, wallets, assets, and related transactions.
Create and assign wallets for your users on multiple supported* blockchains.
*Currently supporting Avalanche, Ethereum and Polygon.
// Create a user
POST https://api.circle.com/v1/ w3s/users
{
"userId": "{{user_id}}"
}
// Get user token and secret key
POST https://api.circle.com/v1/w3s/users/token
{
"userId": "{{user_id}}"
}
// Get challenge id and generate wallet(s)
POST https://api.circle.com/v1/ w3s/user/initialize
{
"idempotencyKey":
"{{idempotencyKey}}"
}
// Create a set of wallets
POST https://api.circle.com/v1/ w3s/user/wallets
{
"blockchains": [
“ETH”,
“AVAX”,
“MATIC”
],
“metadata”: [
{
“name”: “My First Wallet”
}
],
"idempotencyKey":
"{{idempotencyKey}}"
}
Start with just a
few lines
Create and initialize a new user
The id created represents the user’s account, wallets, assets, and related transactions.
// Create a user
POST https://api.circle.com/v1/ w3s/users
{
"userId": "{{user_id}}"
}
// Get user token and secret key
POST https://api.circle.com/v1/w3s/users/token
{
"userId": "{{user_id}}"
}
// Get challenge id and generate wallet(s)
POST https://api.circle.com/v1/ w3s/user/initialize
{
"idempotencyKey":
"{{idempotencyKey}}"
}
Create a set of wallets
Create and assign wallets for your users on multiple supported* blockchains.
*Currently supporting Avalanche, Ethereum and Polygon.
// Create a set of wallets
POST https://api.circle.com/v1/ w3s/user/wallets
{
"blockchains": [
“ETH”,
“AVAX”,
“MATIC”
],
“metadata”: [
{
“name”: “My First Wallet”
}
],
"idempotencyKey":
"{{idempotencyKey}}"
}
Delightful Web3 user experience
Familiar UX
Seamlessly embed wallets into your existing UI for a delightful and streamlined user experience that your customers expect.
Simple access
Enable authentication with PIN and account recovery with security questions so users don’t have to deal with lengthy private keys and secret phrases.
Advanced security
Multi-party computation (MPC) technology helps guard against theft and unauthorized access.
Coming Soon
Gas-free
Sponsor blockchain transaction fees so that users can use your app without added complexity.