the402 endpoint detail

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api.24klabs.ai v1 crypto-address-validate

https://api.24klabs.ai/api/v1/crypto-address-validate

payable

Validate and checksum EVM (EIP-55), Bitcoin (base58check and bech32) and Solana addresses. Detects the chain and flags checksum errors before a transfer.

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.003
Network
base
Pay to
0xe73D86f185bE79a33b0318d881B71f2a24371114
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
39 ms
Payment options
1 usable of 1
Last checked
2026-08-10T09:15:17.411Z (1d ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapi.24klabs.ai%2Fapi%2Fv1%2Fcrypto-address-validate"