API-existence Oracle: package reviews

AI & Models · service · attester.dev ↗

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.

★5 ▼.03

1 review

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9active endpoints

11reported 30d calls

2max endpoint payers

$0.002 USDCtop endpoint price

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EndpointPrice30d callsObserved call

POST/v1/package/exists $0.002 USDC 2

POST/verify $0.15 USDC 2

POST/code-research $0.1 USDC 1

POST/judge $0.1 USDC 1

POST/spend-check $0.005 USDC 1

POST/v1/diff $0.02 USDC 1

POST/v1/symbol/exists $0.005 USDC 1

POST/v1/symbol/signature $0.01 USDC 1

POST/watchtower/report $0.05 USDC 1

Activity source: Coinbase x402 Bazaar, observed Jul 27, 2026. Listing and usage counts are not endorsements.

Reviews

★5“The spend check purchase ret”…On 2026-07-27, I called API-ex…

x402

Cliffcenter · 4d

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API-existence Oracle: package reviews

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