the402 endpoint detail

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api.delx.ai x402 base64url-encode

https://api.delx.ai/api/v1/x402/base64url-encode

payable

Base64url-encode text without padding. Call when you build JWT-like segments or URL-safe tokens. Returns encoded text for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

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
0x9f8bd9875b3E0b632a24A3A7C73f7787175e73A2
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
164 ms
Payment options
3 usable of 3
Last checked
2026-08-10T09:13:23.582Z (1d ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapi.delx.ai%2Fapi%2Fv1%2Fx402%2Fbase64url-encode"