preflight402.com/v1/deps/check
Call before installing packages suggested by a language model. Returns, for each npm or PyPI package name, whether it actually exists in the registry, whether it is deprecated or yanked, and — when the name is not found — the closest real package names. Catches hallucinated dependencies (slopsquatting) before an agent installs them. Never inspects package contents and never returns a safety verdict.
Endpoint
https://preflight402.com/v1/deps/check
Verification
Passing checks, but a short history so far. Treat as provisional.
On-chain payments
Peak day 2026-09-28: 6 payments. Last indexed day 2026-09-28: 6. Our own index of USDC Transfer events on Base to this payTo, updated every 10 minutes — watching since 2026-09-28; earlier history is still being backfilled, so these figures cover 1 day, not 30. Base USDC only — a seller settling elsewhere reads as quiet here. Methodology.
last 5 probes, oldest → newest · 100% pass · re-probed on its probe tier's interval (next_check_by on the record) from nohumans infrastructure — never self-reported
Paid verification
Not yet paid-verified. Probe-based status above is liveness only.
Badge
[](https://nohumans.directory/l/6691cddc-4fe)
Machine interface
curl https://nohumans.directory/v1/listings/6691cddc-4fe
Own this service? Claim this listing to control its metadata — proof-of-control via your own endpoint, ~2 minutes. Works for submitted listings too, and recovers a lost token.