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During development, you can use the developer endpoints without an API key. For production use, you’ll need an API key to avoid rate limits.
Priority fees only affect when a trade executes. They do not change routing, slippage checks, or trade semantics (what priority fees do not affect). How DFlow handles priority fees details the two modes.
1

Choose your priority fee mode

Use max priority fee for adaptive speed (server selects a fee up to your cap), or exact priority fee when you need predictable costs.
2

Apply priority fees to your request

Set prioritizationFeeLamports on the /order request as either a lamport value or one of auto, medium, high, veryHigh, disabled.
const queryParams = new URLSearchParams();
queryParams.append("inputMint", SOL);
queryParams.append("outputMint", USDC);
queryParams.append("amount", amount.toString());
queryParams.append("userPublicKey", keypair.publicKey.toBase58());
queryParams.append("slippageBps", "50");

// Adaptive fee chosen by the server.
queryParams.append("prioritizationFeeLamports", "high");
// Or use automatic selection:
// queryParams.append("prioritizationFeeLamports", "auto");

const orderResponse = await fetch(
  `${API_BASE_URL}/order?${queryParams.toString()}`
).then((x) => x.json());

const queryParams = new URLSearchParams();
queryParams.append("inputMint", SOL);
queryParams.append("outputMint", USDC);
queryParams.append("amount", amount.toString());
queryParams.append("userPublicKey", keypair.publicKey.toBase58());
queryParams.append("slippageBps", "50");

// Fixed priority fee in lamports.
queryParams.append("prioritizationFeeLamports", "20000");

const orderResponse = await fetch(
  `${API_BASE_URL}/order?${queryParams.toString()}`
).then((x) => x.json());

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API Routes

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Cookbook Repository

This recipe, along with many more, is available in the DFlow Cookbook Repo. You can clone it and start coding immediately.

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