the402 endpoint detail

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onchainpulse.theaslangroupllc.com api etf-flows

https://onchainpulse.theaslangroupllc.com/api/etf-flows

answers 402, partial

Crypto ETF flow intelligence — daily/weekly net flows for US spot BTC, ETH, and SOL ETFs, live per-issuer breakdown (IBIT, FBTC, ARKB, ETHA and more), cumulative flows, and a deterministic accelerating/decelerating streak read. For advisor, RIA, and trading agents.

We sent a real GET request to this endpoint and it answered 402 with payment requirements we could parse. It advertises 14 ways to pay and only 13 of them are usable.
Price
$0.15
Network
base
Pay to
0x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
GET
Response latency
219 ms
Payment options
13 usable of 14
Last checked
2026-08-15T14:32:56.277Z (5d ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fonchainpulse.theaslangroupllc.com%2Fapi%2Fetf-flows"