the402 endpoint detail

← All endpoints

agent402.tools api contract-inspect

https://agent402.tools/api/contract-inspect

answers 402

Deep contract inspection on any Blockscout-hosted chain (dozens: Ethereum, Base, Polygon, Optimism, Arbitrum, Celo, Gnosis, …): verified source, full ABI, proxy type + implementations, compiler + license metadata - bought per call from Blockscout's Pro API over x402, no API key anywhere in the chain. Richer than contract-source (Sourcify): adds ABI + proxy resolution and far wider chain coverage.

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.01
Network
base
Pay to
0x77065d81e18ad403BCD6e9A0616b288e16744121
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
119 ms
Payment options
13 usable of 13
Last checked
2026-09-06T01:17:05.824Z (19d ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fagent402.tools%2Fapi%2Fcontract-inspect"