the402 endpoint detail

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sovereign-x402-zeta.vercel.app sequence palindrome

https://sovereign-x402-zeta.vercel.app/api/v1/sequence/palindrome

answers 402

Check if a given number is a palindrome.

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.001
Network
base
Pay to
0x41595e02275629126aD11551E39ee9Ac8531Ad3C
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
156 ms
Payment options
1 usable of 1
Last checked
2026-09-06T01:23:52.359Z (21d ago)
Category
data

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fsovereign-x402-zeta.vercel.app%2Fapi%2Fv1%2Fsequence%2Fpalindrome"