attester.dev
answeringDeterministic 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.
- Endpoint
- https://attester.dev/v1/package/exists
- Price
- $0.002 / call
- Settles via
- cdp
- Category
- —
- Last seen live
- Tue, 08 Sep 2026 05:23:37 UTC
- Last probed
- Tue, 08 Sep 2026 05:23:37 UTC
- First indexed
- Tue, 08 Sep 2026 05:22:22 UTC
- Sources
- cdp-x402
Probe history
Last 1 probes, newest on the right. 100% answered with a payment challenge.
| When | Result | Method | Status | Latency |
|---|---|---|---|---|
| Tue, 08 Sep 2026 05:23:37 UTC | challenge | http-402 | 402 | 2973 ms |
JSON: /api/v1/services/attester.dev. Own this service? Update the listing.