B66.3 / 100
x402-isin-check
Advertised description
(Provider-supplied: an unverified claim, not checked by us. The trust grade above is our independent measurement.)
Is this ISIN well formed? One GET applies the ISO 6166 check digit and returns valid, the supplied and expected check digit, the checksum total, the country code and name, and the 9-character NSIN. Malformed input is…
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Is this ISIN well formed? One GET applies the ISO 6166 check digit and returns valid, the supplied and expected check digit, the checksum total, the country code and name, and the 9-character NSIN. Malformed input is 400 before payment; a wrong check digit is 200 with valid=false. The algorithm is bundled in this Worker; no registry is queried, nothing is stored and the query is not logged. 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.
30-day uptime
100.0%
Avg latency (EU)
912 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
0.62
full-density score
Advertised price
$0.001
USDC
Price stability
Stable
last 30 days
Probes (30d)
44
full record · up to 48/day
More details ▾
| Endpoint ID | 278582 |
| Pay on Base | $0.001 USDC · to 0x6f60…89c3 ↗ |
| First seen | 2026-10-20 |
| Last probed | 2026-10-29 |
| Status | listed |
| Snapshot computed | 2026-10-30 01:53 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 9 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).