Wallet Infrastructure for the Internet
APIs to create wallets, process transactions, and move value across Bitcoin, Ethereum, Solana, and Tron. Pay only for what you use.
// Create a wallet in 3 lines
import { Relay } from '@relay/sdk';
const relay = new Relay('your-api-key');
const wallet = await relay.wallets.create({
network: 'ethereum',
label: 'customer-deposit'
});
console.log(wallet.address);
// 0x742d35Cc6634C0532925a3b844Bc...Powering transactions across multiple networks
Everything you need to build crypto payments
Four powerful APIs working together to handle wallets, transactions, and fund movements.
Wallet
Create deposit addresses across Bitcoin, Ethereum, Solana, and Tron. Generate unlimited sub-wallets under a master wallet.
Learn more →Events
Receive real-time webhook notifications for deposits, withdrawals, and balance changes. Never miss a transaction.
Learn more →Data
Access complex blockchain data in a simple, structured format. Query balances, transactions, and address history.
Learn more →Automation
Define rules to automatically forward funds from deposit wallets to your master wallet. Batch process transactions.
Learn more →From first API call to production in a day
Our APIs are designed to be intuitive and well-documented. Create wallets, receive webhooks, and query blockchain data with just a few lines of code.
- RESTful API with predictable responses
- SDKs for JavaScript, Python, Go, and PHP
- Sandbox environment for safe testing
- Detailed error messages and debugging
from relay import Relay
client = Relay(api_key="your-api-key")
# Get wallet balance
balance = client.wallets.get_balance(
wallet_id="wallet_abc123"
)
print(f"Balance: {balance.amount} {balance.currency}")
# Balance: 1.5 ETH
# Send transaction
tx = client.transactions.send(
from_wallet="wallet_abc123",
to_address="0x742d35Cc...",
amount="0.5",
currency="ETH"
)Built for scale, priced for startups
Multi-Chain Support
Four networks, one API. Bitcoin, Ethereum, Solana, and Tron with consistent interfaces.
Lightning Network
Fast, cheap Bitcoin transactions through Lightning Network integration.
Enterprise Security
Multi-sig support, key encryption, and SOC 2 compliance for peace of mind.
Pay-as-You-Go
No monthly minimums or setup fees. Pay only for what you use.
99.9% Uptime SLA
Enterprise-grade reliability with guaranteed uptime and 24/7 monitoring.
Developer Support
Active Discord community and dedicated support for enterprise customers.
Built for builders across industries
Crypto Exchanges
Power deposits and withdrawals across multiple chains with real-time confirmations.
E-commerce
Accept crypto payments on your online store with automatic fund forwarding.
Fintech Apps
Add crypto wallets to your existing product without building infrastructure.
Enterprise-grade security you can trust
We take security seriously. Your funds and data are protected by industry-leading security practices and regular third-party audits.
SOC 2 Type II
Certified compliant
AES-256 Encryption
Keys encrypted at rest
Multi-Sig Wallets
Configurable approval flows
Regular Audits
Third-party security reviews
Ready to build?
Get started with Relay Finance in minutes. No credit card required for sandbox access.