# Treasury Preflight

  > Pay-per-call checks for moving USDC and USDT on Ethereum, Base, Arbitrum, Optimism and Polygon. Payment: x402 (USDC on Base). No account or API key.

  ## Paid endpoints (x402)
  - GET https://preflight.admapu.xyz/v1/preflight?chain=ethereum&token=USDC&from=0x..&to=0x..&amount=2500 ($0.03): will this exact transfer succeed, what will it cost, pass/warn/fail with reasons.
  - GET https://preflight.admapu.xyz/v1/route?token=USDC&amount=2500 ($0.01): cheapest chain right now, fee in USD and bps, send now or wait.
  - GET https://preflight.admapu.xyz/v1/fees?chains=ethereum,base&token=USDT ($0.002): current transfer fee per chain, bound to a block.

  ## Free
  - GET https://preflight.admapu.xyz/free/fees: Ethereum USDC/USDT fee, refreshed once a minute.
  - https://preflight.admapu.xyz/openapi.json
  - Human dashboard: https://stablecoin-fees.admapu.xyz

  ## Continuous monitoring
  - https://treasurytrace.xyz