Assay

Every paid API on Algorand, tested rather than listed.

861 x402 endpoints from 39 merchants across 46 hosts — each one called on a schedule to check it answers, that its 402 challenge parses, and that it charges what it advertises.

Endpoints live
773
Open defects
85
Overcharging
8
Paid calls
28,684
Last sweep
19h ago · 100% covered
Buyer reviews
none yet
All categories4Security & risk0Markets & trading0Chain data1AI & inference1Web & documents0Infra & storage0Utilities2
Any13Live5Overcharging1Defects7Unswept1
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1 merchant · 133 endpoints · 2 endpoints charge above list, named below each merchant

127.0.0.1:4021

Chain data133 endpoints2 hosts1 loopback host

Algorand Foundation–related holder wallets snapshot for ALGO (full list in one response; not paged)

69%live230paid calls2payers
  • Price mismatch/x402/algo/nodes-historylisted $0.02 · charges $0.10 (5.0×)
  • Price mismatch/x402/algo/foundation-total-historylisted $0.02 · charges $0.10 (5.0×)
$0.01 – $0.50
USDC
Overcharges2 above list · 19h ago40 of 133 failing