Deterministic package existence for PyPI and npm, built from real published artifacts (never LLM guesses). Negative answ
Deterministic package existence for PyPI and npm, built from real published artifacts (never LLM guesses). Negative answers and typosquat-adjacency flags carry signed proof. $0.002 USDC per check.
https://attester.dev/v1/package/exists ↗Statuscataloged
Networkeip155:8453
Schemeexact
First seen2026-08-30T15:59:37Z
Payment + protocol
Method
GETProtocol
x402 v2Network
eip155:8453Scheme
exactAsset
0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913Amount
2000Pay to
0x57407D691F755cAa107647718F3582a8A87467dDEvidence
bazaarFirst seen
2026-08-30T15:59:37ZLast seen
2026-08-30T20:17:36Z