Add crypto swaps to your app with the InstaSwap API

# get the best route for a swap
curl https://walletlessapi.instaswap.com/quote-lite \
  -H "Content-Type: application/json" \
  -d '{
    "affiliateId": "YOUR_AFFILIATE_ID",
    "from": "btc.btc",
    "to": "eth.eth",
    "amount": "1"
  }'

# 200 OK
{
  "estimatedOut": 29.113,
  "estimatedOutUsd": 87339.96,
  "etaSeconds": 412,
  "feeBreakdown": [ … ]
}

# tag any quote or swap with a sub-source
curl https://walletlessapi.instaswap.com/quote-lite \
  -H "Content-Type: application/json" \
  -H "X-Sub-Affiliate-Id: a1b2c3d4e5f6…" \
  -d '{
    "affiliateId": "YOUR_AFFILIATE_ID",
    "from": "btc.btc", "to": "eth.eth",
    "amount": "1"
  }'

# feeBreakdown now includes the split
{
  "feeBreakdown": [
    { "type": "instaswap",    "amountUsd": 1.25 },
    { "type": "affiliate",    "amountUsd": 0.85 },
    { "type": "subAffiliate", "amountUsd": 0.40 }
  ]
}

const API = "https://walletlessapi.instaswap.com";

// 1. quote → 2. create swap → 3. poll status
const swap = await fetch(API + "/swap-lite", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    affiliateId: "YOUR_AFFILIATE_ID",
    from: "btc.btc", to: "eth.eth",
    amount: "0.001",
    recipientAddress: "0xAbC…123",
    refundAddress: "bc1q…xyz"
  })
}).then(r => r.json());

// user sends funds to swap.depositInfo[0].depositAddress
// then poll: GET /swap/${swap.txid}/status-lite
// or receive webhooks (X-Instaswap-Signature verified)