Fee Breakdown

All intent responses include a FeeBreakdown structure that details the cost components of a payment. Fees are computed per (payer_chain, target_chain) pair — the same payer chain can produce different target_chain_fee values depending on the target.

Fee Structure

Understanding Fees

• Source Chain Fee: The gas/transaction cost required on the payer's chain (for example a Solana priority fee or Base gas).
• Target Chain Fee: The gas cost for the stablecoin transfer on the target chain. This varies meaningfully between targets — Ethereum is typically the most expensive, while Base and Polygon are much cheaper. Budget accordingly if you let users pick their target chain.
• Platform Fee: Cross402's service fee for processing the cross-chain settlement.
• Total Fee: The sum of all fees, deducted from the payer's sending amount before the merchant receives the net amount.

Fee rows reflect the chains your deployment exposes via GET /api/chains. See Supported Chains for the live set and per-chain caveats.

Example Response — base → Ethereum

{
  "fee_breakdown": {
    "source_chain": "base",
    "source_chain_fee": "0.001",
    "target_chain": "ethereum",
    "target_chain_fee": "0.85",
    "platform_fee": "1.00",
    "platform_fee_percentage": "1.0",
    "total_fee": "1.851"
  }
}

target_chain and target_chain_fee reflect whichever target you selected on CreateIntent. Requesting target_chain: "polygon" on the same payer would return a much lower target_chain_fee.