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base-simulate x402 REST checked

Simulate a Base mainnet transaction before sending it - will it succeed, estimated gas, and the decoded revert reason if it would fail.

x402.agentindex.world Dev & Code 3 calls / 30d checked 2026-10-24

0.005 USDC per call per call checked

Gas estimate x402 REST usage

Simulate a transaction before signing: runs `eth_estimateGas` for `{ to, from?, data?, value? }` and returns the estimated gas units and estimated fee (current gas price x gas, in wei + ETH). If the node rejects the call...

chain.openverbs.com Dev & Code 2 calls / 30d checked 2026-11-01

0.004 USDC per call per call

Crypto Microdata for Agents x402 REST

Live Korea kimchi premium: Upbit KRW vs global USD for BTC and ETH, plus USD/KRW FX. Korea crypto arb/sentiment signal. Optional symbols=BTC,ETH filter. Alias: /kr/kimchi-premium.

kr-x402-mvp.kgy5612.workers.dev Data & Finance checked 2026-11-01

0.002 USDC per call per call

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