Integrate the Universal API

The Universal API lets you integrate 80+ cross-chain assets into your wallet, DEX, or dApp. It uses an RFQ (request-for-quote) system where Merchants provide just-in-time liquidity.

How it works

1. Your app requests a quote from the API
2. A Merchant returns a guaranteed price
3. User signs the quote (EIP-712 for EVM, transaction signing for Solana)
4. Submit the signed order
5. Merchant executes the trade, user receives tokens

Base URL

Without API key: https://www.universal.xyz/api/v1

With API key: https://relayer.universal.xyz/api

Endpoints

POST /quote - Request a price quote

POST /order - Submit a signed order

Quick example

const quote = await fetch('https://www.universal.xyz/api/v1/quote', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    type: 'BUY',
    token: 'BTC',
    pair_token: 'USDC',
    blockchain: 'BASE',
    slippage_bips: 20,
    user_address: '0x...',
    pair_token_amount: '1000000',
  }),
});

Supported chains

• Base
• Arbitrum
• Polygon
• Solana
• World

Monetization

Add referrer_address and referrer_bps to your quote requests to earn fees on every trade.

Rate limits

• Without API key: 10 requests/minute
• With API key: 100 requests/minute

Full documentation

Read the complete API reference

Support

Email dev@universal.xyz or join Discord