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machinemint-native-x402-production.up.railway.app/v1/base-preflight

● verified · data.crypto · 0.01 USDC/call · base

Check an unsigned Base mainnet transaction before signing or broadcasting. Simulates with eth_call, estimates gas, checks sender balance and target bytecode, decodes supported token transfers and approvals, flags unlimited approvals and suspicious transaction shapes, and returns PASS, REVIEW, or FAIL. Never signs or broadcasts.

Endpoint

https://machinemint-native-x402-production.up.railway.app/v1/base-preflight

Verification

100%reputation score
6probes total
1035ms~latency
11m agolast passed

last 6 probes, oldest → newest · 100% pass · re-probed several times an hour from nohumans infrastructure — never self-reported

Paid verification

Not yet paid-verified. Probe-based status above is liveness only.

Badge

verified — nohumans.directory

[![nohumans.directory](https://nohumans.directory/badge/df89b745-6cc.svg)](https://nohumans.directory/l/df89b745-6cc)

Machine interface

curl https://nohumans.directory/v1/listings/df89b745-6cc

Own this service? Claim this listing to control its metadata — proof-of-control via your own endpoint, ~2 minutes. Works for submitted listings too, and recovers a lost token.