Swap API

Solana Swap API

Build swap transactions server-side, sign with any wallet, then broadcast. Great for apps that want reliable swap construction without maintaining custom routing code.

Swap Build Docs Swap Broadcast Docs Get API key

Flow

Call POST /swap/build to get an unsigned tx (base64).
Sign the transaction client-side with your wallet.
Call POST /swap/broadcast with the signed tx to execute.

Optional: attach a fee wallet/percent to monetize swaps in your own app.

Quick example

Curl | swap_build.sh

curl -X POST \
  -H "x-api-key: YOUR_KEY" \
  -H "content-type: application/json" \
  -d '{"userPublicKey":"...","inputMint":"So111...","outputMint":"EPjF...","amount":1000000,"slippageBps":50,"swapType":"buy"}' \
  https://us-east.dritan.dev/swap/build

TypeScript (SDK) | swap_build_and_broadcast.ts

import { DritanClient } from "dritan-sdk";
import { VersionedTransaction } from "@solana/web3.js";

const client = new DritanClient({ apiKey: process.env.DRITAN_API_KEY! });

const build = await client.buildSwap({
  userPublicKey: wallet.publicKey.toBase58(),
  inputMint: "So11111111111111111111111111111111111111112",
  outputMint: "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
  amount: 100_000_000,
  slippageBps: 50,
  swapType: "buy",
});

const tx = VersionedTransaction.deserialize(Buffer.from(build.transactionBase64, "base64"));
const signed = await wallet.signTransaction(tx);

const sent = await client.broadcastSwap(Buffer.from(signed.serialize()).toString("base64"));
console.log(sent.signature);

After signing, broadcast with /swap/broadcast.