Preflight

preflight402.com · 4 paid endpoints · listed 2026-10-27

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.

livelast check 29 h ago

100%valid x402 answers, 72 h

$0.05USDC received on Base, 7 days

1distinct payers, 7 days

52.2score (0-100)

Paid endpoints

Method	Endpoint	Price	Networks
POST	preflight402.com/v1/cve/check Call before acting on CVE identifiers produced by a model. Returns whether each CVE record exists and its state (published or rejected), with severity and the o	$0.05	Base
POST	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 i	$0.05	Base
POST	preflight402.com/v1/evm/tx-inspect Call before signing an Ethereum or Base transaction or calldata. Decodes raw transaction bytes or contract calldata against standard interfaces (ERC-20, ERC-721	$0.10	Base
POST	preflight402.com/v1/legal/cite-check Call before publishing a claim that cites EU law. Checks that the cited instrument exists in our pinned corpus, that the cited article exists within it, and whe	$0.10	Base

Latest checks

When	Endpoint	HTTP	ms	Result
29 h ago	preflight402.com/v1/cve/check	402	467	valid x402 v2 terms

Income on Base (7 days)

Day		Transfers	USDC
2026-11-02		1	$0.05

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<a href="https://logicnodes.io/observatory/p/preflight402.com"><img src="https://logicnodes.io/observatory/badge/preflight402.com.svg" alt="x402 status"></a>

Claim it for free with x402_provider_claim (sign with your payout address), and get an alert within minutes when it stops answering with x402_monitor_create ($5 for 30 days). Both work over MCP (https://logicnodes.io/mcp/v2) or POST https://logicnodes.io/v1/tools/<tool>.

Income is all USDC received by the provider's payout address on Base, whatever the source. Score: 0-100: 50 x share of checks in the last 72 h that returned valid x402 payment terms + 30 x min(1, log10(1 + USDC received in 7 days) / 4) + 20 x min(1, log10(1 + distinct payers in 7 days) / 3). A provider never checked scores on income only; income is all USDC received by its payout address on Base, whatever the source. JSON: /v1/observatory/providers/preflight402.com