Portals Foresight — DeFi Transaction Simulation API

https://foresight.portals.fi

● healthy utility

Simulate any EVM transaction on 31+ chains. Preview token swaps, validate DeFi deposits and borrows, compare DEX quotes, and verify multi-step transactions — no gas or balance needed. Pay per request with USDC on Base.

How to call

cURL · x402-fetch / x402-axios will auto-handle 402

curl -X POST https://foresight.portals.fi

/.well-known/x402.json

https://foresight.portals.fi/.well-known/x402