the402 endpoint detail

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api.24klabs.ai api eth-calldata-decode

https://api.24klabs.ai/api/eth-calldata-decode

payable

Compute the keccak256 hash and 4-byte function selector of a signature string, and optionally ABI-decode raw hex calldata given an ordered list of static Solidity types.

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.002
Network
base
Pay to
0xe73D86f185bE79a33b0318d881B71f2a24371114
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
132 ms
Payment options
1 usable of 1
Last checked
2026-08-10T09:12:49.001Z (1d ago)
Category
ai-inference

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapi.24klabs.ai%2Fapi%2Feth-calldata-decode"