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MARKET MONITOR / CATALOGUE Services 117,230 MCP listed 40,082 x402 77,211 Rails Base / Solana / Polygon / Arbitrum Imported 2026-10-27 · 3 sources
Provider

preflight402.com

preflight402.com · 1 listed service · provider site

Preflight x402 REST usage

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...

preflight402.com Dev & Code 3 calls / 30d checked 2026-10-27
0.05 USDC per call per call

Provider identity is derived from the domain or repository in the source record. If two vendors share a host, they appear together here — that is a limitation of the data, not a statement about ownership.