the402 endpoint detail

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api.agentstools.dev etf flows

https://api.agentstools.dev/etf/flows

answers 402

Daily net creation/redemption flow for spot Bitcoin or Ethereum ETFs, computed from each issuer's own holdings disclosure: per-fund and total net flow in USD and coin for the latest day, a recent series and the window cumulative. One normalized call instead of polling each issuer site and differencing units.

We sent a real GET request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.01
Network
base
Pay to
0xF22e558a00D91Ee12A1F50C52186FecB8dDFf493
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
GET
Response latency
175 ms
Payment options
1 usable of 1
Last checked
2026-09-06T01:16:50.690Z (2h ago)
Category
other

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