x402 endpoint uptime monitor

caution grade B Base found on thirdweb found on PayAI confidence 0.80
https://x402-catalog-history.ai-business-surface.workers.dev/watch
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Advertised description
登録した x402 のURLの支払条件が変わった時だけ差分を返す。変わっていなければ changed:false。壊れる前に気づくための1コール。条件は scheme・network・asset・amount・payTo・maxTimeoutSeconds の6項目で、差分は変わった項目の field / from / to だけ。curl: curl -X POST -H 'content-type:…Show more ▾Show less ▴登録した x402 のURLの支払条件が変わった時だけ差分を返す。変わっていなければ changed:false。壊れる前に気づくための1コール。条件は scheme・network・asset・amount・payTo・maxTimeoutSeconds の6項目で、差分は変わった項目の field / from / to だけ。curl: curl -X POST -H 'content-type: application/json' -d '{"url":"https://api.example.com/paid"}' https://<host>/watch → watch_id を受け取り、以後は curl 'https://<host>/watch?id=<watch_id>' で差分だけを読む。Response: {"watch_id":"…","changed":true,"changes":[{"field":"amount","from":"20000","to":"30000"}],"conditions":{"scheme":"exact","network":"eip155:8453","asset":"0x8335…","amount":"30000","payTo":"0x6f60…","maxTimeoutSeconds":60},"observed":true,"checks":2} — 変わった項目だけが返る。 Monitor an x402 endpoint's uptime and payment conditions: register the URL once, then every later call returns only the fields that changed (changed:false when nothing moved) — an uptime and change monitor for x402 paid endpoints, with no webhook to run.登録も差分も1コール 0.02 USDC。対象は支払いの後に1回だけ取得し、5秒で打ち切り・リダイレクトは3回まで。同じURLの60秒以内の再取得はキャッシュから返す。 A purchase is two calls by design: this first call returns 402 with the price and the payment terms, and you then repeat the same request with the PAYMENT-SIGNATURE header to receive the 200 delivery.
(Provider-supplied: an unverified claim, not checked by us. The trust grade above is our independent measurement.)
30-day uptime
100.0%
Avg latency (EU)
867 ms
slow · measured from a single EU vantage point; includes network round-trip distance to the endpoint; a geographically distant endpoint reads slower even when its server is fast, so it is only lightly weighted in the score
Confidence
0.80
full-density score
Advertised price
$0.02
USDC
Price stability
Stable
last 30 days
Probes (30d)
73
full record · up to 48/day
More details ▾
Endpoint ID254510
Pay on Base$0.02 USDC · to 0x6f60…89c3 ↗
First seen2026-10-15
Last probed2026-10-30
Statuslisted
Snapshot computed2026-10-30 04:53 UTC (free snapshot, recomputed at least every 24h)
Why this verdict?2 warnings
A wallet payment page opens first; approve the USDC payment and the full JSON report loads right in your browser. Want a taste first? Read a free full sample report.
This page is the free cached snapshot (computed 6 hours ago, refreshed at least every 24h). Here's what the paid API adds.
  • ✓Live re-probe at decision time
    The score is computed the moment you ask, not up to 24h ago.
  • ✓Instant snapshot refresh
    Every paid call rewrites this page, the badge and the card immediately.
  • ✓The full “why”, machine-readable
    Confidence band, component breakdown, every risk flag with its evidence.
  • ✓On-chain settlement proof
    Real USDC volume and distinct payers behind the pay-to wallet.
  • ✓90-day raw history
    Every listing, price and payTo change, every probe result.
  • ✓Ranked better alternatives
    Higher-scored endpoints serving the same function, when they exist.
  • ✓Change & liveness alerts
    PayTo/price moves, spec regressions, downtime; 5-minute probes while watched.
$npx -y x402-trust-mcpGive your agents the tools to do all of this for you, with one install. Agents use the x402_trust_score MCP tool or POST /v1/x402-trust directly (pay-per-call over x402, from $0.005).