Solana Tracker
Swap API

Swap API Documentation

The Swap API provides a simple interface for token swaps on Solana with competitive fees and deep liquidity.

Supported DEXs & Tokens

The API integrates with the following DEXs and token platforms:

Libraries

Easy to use JavaScript and Python libaries.

Parameters

Required and optional parameters for swap requests

Implementation

Code examples for web and Node.js integration

Fee Structure

API usage fees and volume discounts

Endpoints

curl --location 'https://swap-v2.solanatracker.io/swap?from=So11111111111111111111111111111111111111112&to=4k3Dyjzvzp8eMZWUXbBCjEvwSkkk59S5iCNLY3QrkX6R&fromAmount=1&slippage=10&payer=PAYER_ADDRESS'

Use GET requests for simple swaps or when integrating with web interfaces.

Request Parameters

Both GET and POST requests support the following required parameters:

ParameterDescriptionExample
fromThe base token addressSo11111111111111111111111111111111111111112 (SOL)
toThe quote token address4k3Dyjzvzp8eMZWUXbBCjEvwSkkk59S5iCNLY3QrkX6R (RAY)
amountThe amount of the base token to swap1, "auto", or "50%"
slippageMaximum acceptable slippage percentage10
payerPublic key of the wallet sending the transactionPAYER_ADDRESS

Optional Parameters

ParameterDescriptionExample
priorityFeeAmount in SOL to increase transaction priority0.000005 or "auto"
priorityFeeLevelPriority level when priorityFee is set to "auto""min", "low", "medium", "high", "veryHigh", "unsafeMax"
txVersionTransaction version"v0" or "legacy"
feeCustom fee for your users"WALLET_ADDRESS:PERCENTAGE"
feeTypeFee application type"add" or "deduct"
onlyDirectRoutesDisable multi-hop swapstrue or false (default)

The amount parameter accepts three types of values:

  • Specific numeric value (e.g., 1)
  • "auto" to use the full wallet balance
  • Percentage (e.g., "50%") to use that portion of the wallet balance

The feeType parameter is set to "add" by default. The "deduct" option is only used when the from address is SOL.

For more information about priority fees, read this blog post.

Example Response

{
   "txn":"BASE64_TX",
   "rate":{
      "amountIn":1,
      "amountOut":81.631985,
      "minAmountOut":73.4687865,
      "currentPrice":0.012219167460548153,
      "executionPrice":0.010997250714493338,
      "priceImpact":0.002517,
      "fee":0.000005,
      "baseCurrency":{
         "mint":"So11111111111111111111111111111111111111112",
         "decimals":9
      },
      "quoteCurrency":{
         "mint":"4k3Dyjzvzp8eMZWUXbBCjEvwSkkk59S5iCNLY3QrkX6R",
         "decimals":6
      },
      "platformFee":9000000,
      "platformFeeUI":0.009
   },
   "timeTaken":0.016,
   "type":"legacy"
}

Integration Guide

  1. Request a swap transaction - Call the swap endpoint with your parameters
  2. Load the transaction - Deserialize the returned transaction
  3. Sign the transaction - Use the appropriate wallet or keypair to sign
  4. Send the transaction - Submit to the Solana network
  5. Confirm the transaction - Verify the transaction succeeded

Loading the Transaction

const serializedTransactionBuffer = Buffer.from(res.txn, "base64");
let txn;
 
if (res.type === 'v0') {
  txn = VersionedTransaction.deserialize(serializedTransactionBuffer);
} else {
  txn = Transaction.from(serializedTransactionBuffer);
}
 
if (!txn) return false;

Sending the Transaction

if (res.type === 'v0' && txn) {
  await wallet.signTransaction(txn);
}
 
const txid = await wallet.sendTransaction(txn, connection, {
  skipPreflight: true,
  maxRetries: 4,
});

Use this approach for web applications with Solana Wallet Adapter.

Fees

We charge a 0.5% fee on each successful transaction.

For high-volume usage on public bots or sites, contact us to discuss reduced fees:

Libraries

Swap API - Official SDK Libraries

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