DeFi Trading API Comparison

// 0x API — Get swap price (Ethereum)
const res = await fetch(
  'https://api.0x.org/swap/v1/price' +
  '?sellToken=USDC' +
  '&buyToken=WETH' +
  '&sellAmount=1000000000', // 1000 USDC
  {
    headers: {
      '0x-api-key': 'YOUR_0X_API_KEY'
    }
  }
);
const price = await res.json();
console.log('Buy amount:', price.buyAmount);
console.log('Price:', price.price);
console.log('Sources:', price.sources);

// Jupiter — Get swap quote (Solana)
const res = await fetch(
  'https://quote-api.jup.ag/v6/quote' +
  '?inputMint=EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v' + // USDC
  '&outputMint=So11111111111111111111111111111111111111112' + // SOL
  '&amount=1000000000' + // 1000 USDC (6 decimals)
  '&slippageBps=50' // 0.5% slippage
);
const quote = await res.json();
console.log('Output amount:', quote.outAmount);
console.log('Route plan:', quote.routePlan);
console.log('Price impact:', quote.priceImpactPct);

// Odos — Get swap quote (any EVM chain)
const res = await fetch('https://api.odos.xyz/sor/quote/v2', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    chainId: 1, // Ethereum
    inputTokens: [{
      tokenAddress: '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48',
      amount: '1000000000' // 1000 USDC
    }],
    outputTokens: [{
      tokenAddress: '0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2',
      proportion: 1
    }],
    userAddr: '0xYourWalletAddress'
  })
});
const quote = await res.json();
console.log('Output:', quote.outAmounts);
console.log('Gas estimate:', quote.gasEstimate);

// 1inch — Get spot prices for tokens
const res = await fetch(
  'https://api.1inch.dev/price/v1.1/1', // chainId 1 = Ethereum
  {
    method: 'POST',
    headers: {
      'Authorization': `Bearer ${API_KEY}`,
      'Content-Type': 'application/json'
    },
    body: JSON.stringify({
      tokens: [
        '0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2', // WETH
        '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48'  // USDC
      ],
      currency: 'USD'
    })
  }
);
const prices = await res.json();
console.log(prices);

# Frostbyte — No API key, no signup
curl https://agent-gateway-kappa.vercel.app/v1/defi-trading/prices

# Single token
curl https://agent-gateway-kappa.vercel.app/v1/defi-trading/price/ETH

# Jupiter — Solana token price (no API key)
curl "https://price.jup.ag/v6/price?ids=SOL"

# Odos — Token pricing (no API key)
curl "https://api.odos.xyz/pricing/token/1/0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2"