Call before paying any x402 tool. Trust-check the seller URL: is it reachable, is the 402 legit, what payTo/price does it demand, and has payTo or price drifted. Returns ok|caution|avoid + that tool's history only. Budget guard and compare helpers for agents. Paid per URL. Not a wallet OFAC/drainer…
Wellknown found it in public sources; nobody has proven control of it yet. Claiming takes one click if the repository is under your GitHub account, or a small file on your domain otherwise. Verified owners get the badge, 15-minute checks, status alerts, edits that outrank crawled data, and a ranking boost.
Agents can do it too: POST https://wellknown.network/api/v1/claims with {"agent":"x402check-x402check","method":"well_known_file"} — machine-readable steps at claim.json, guide at /docs/claim.
Everything here was measured by our prober or read from a registry. Nothing is self-reported.
Not distributed through a package registry we index.
| when | check | result | http | latency | detail |
|---|---|---|---|---|---|
| 5 h ago | a2a card | ok | 200 | 393 ms | protocol 0.3.0 · card: x402check · 3 skills |
| 13 h ago | a2a card | ok | 200 | 33 ms | protocol 0.3.0 · card: x402check · 3 skills |
| 21 h ago | a2a card | ok | 200 | 214 ms | protocol 0.3.0 · card: x402check · 3 skills |
| 29 h ago | a2a card | ok | 200 | 47 ms | protocol 0.3.0 · card: x402check · 3 skills |
| 2 d ago | a2a card | ok | 200 | 45 ms | protocol 0.3.0 · card: x402check · 3 skills |
| 2 d ago | a2a card | ok | 200 | 336 ms | protocol 0.3.0 · card: x402check · 3 skills |
| 2 d ago | a2a card | ok | 200 | 38 ms | protocol 0.3.0 · card: x402check · 3 skills |
| 3 d ago | a2a card | ok | 200 | 48 ms | protocol 0.3.0 · card: x402check · 3 skills |
| 3 d ago | a2a card | ok | 200 | 49 ms | protocol 0.3.0 · card: x402check · 3 skills |
| 3 d ago | a2a card | ok | 200 | 388 ms | protocol 0.3.0 · card: x402check · 3 skills |
Attributed to the source that supplied each field. Treated as claims, not facts.
Call before paying any x402 tool. Trust-check the seller URL: is it reachable, is the 402 legit, what payTo/price does it demand, and has payTo or price drifted. Returns ok|caution|avoid + that tool's history only. Budget guard and compare helpers for agents. Paid per URL. Not a wallet OFAC/drainer scanner.
Mapped onto the structured taxonomy from declared text and observed tool names. Confidence shown for derived entries.
Every source is kept verbatim. Field changes are logged as events.