the402 endpoint detail

← All endpoints

evm-canon-base.onrender.com encode approve

https://evm-canon-base.onrender.com/encode/approve

answers 402

Build ERC-20 approval calldata, flagging unlimited allowances before anything is signed

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
0x8797b596a56f8b2d46f428fca2e6ac2a62a353ee
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
373 ms
Payment options
1 usable of 1
Last checked
2026-08-15T14:31:01.488Z (1h ago)
Category
web-scraping

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fevm-canon-base.onrender.com%2Fencode%2Fapprove"