Fees

Every cost is quoted before you commit. Nothing is charged that didn't appear on the quote you built.

Route fees

Each route carries a fees object:

Field	Meaning
routeFee / routeFeeUsd	The routing fee for this route, in input-token units and USD.
integratorFee / integratorFeeUsd	Your own fee, when an integrator fee is configured for your key. Zero otherwise.

Fees are reflected in amountOut — the quoted output is what the user receives after fees, not before.

Gas

• Self-executed swaps (Build path and friends): you submit the returned transaction, so you pay gas as usual. The quote's gasFee object (gasFee, gasFeeUsd, gasLimit) tells you what to expect.
• Gasless swaps: the platform relayer pays the gas via Photon. The user pays no native token — that cost is covered by the gasless service fee below.

The gasless service fee

Gasless execution charges a small fee in the input token, targeted at roughly $0.01 USD per swap. It appears on every gasless quote as:

"fee": {
  "feeAmount": "10000",          // input-token units (string)
  "feeRecipient": "0x…",
  "feeUsd": 0.01
}

The fee is part of the signed Permit2 amount, so the user authorizes it explicitly — there is no hidden spread. If the input amount is too small to cover the fee meaningfully, the quote reflects that; show feeUsd next to the quoted output and let the user decide.

No fee, no charge cases

• Quoting is free — hit Get quote routes as often as you like within rate limits.
• An expired quoteId that fails to build costs nothing.
• A gasless submission that fails on-chain does not deliver output; the specific failure mode is reported on Get gasless swap status.