x402 operator - independently measured by Market402. Status: probed, not yet verified
Capability tags (auto-derived from listed descriptions): crypto, search. Machine-readable: /badge/underscoredone.com (live JSON) | /operators.json. Updated 2026-07-30T14:08 UTC, refreshed by weekly full-census probes.
| host | score | endpoints | verified |
|---|---|---|---|
| curl-http-request.underscoredone.com | 40.0 | 1 | 0 |
| dns-whois-lookup.underscoredone.com | 40.0 | 1 | 0 |
| sitemap-url-extractor.underscoredone.com | 40.0 | 1 | 0 |
| qr-code-generator.underscoredone.com | 40.0 | 1 | 0 |
| http-status-checker.underscoredone.com | 40.0 | 1 | 0 |
| domain-age-checker.underscoredone.com | 40.0 | 1 | 0 |
| json-suite.underscoredone.com | 40.0 | 1 | 0 |
| hash-hmac.underscoredone.com | 40.0 | 1 | 0 |
| mortgage-amortization.underscoredone.com | 40.0 | 1 | 0 |
| url-uptime-checker.underscoredone.com | 40.0 | 1 | 0 |
| ocr.underscoredone.com | 40.0 | 1 | 0 |
| ens-resolver.underscoredone.com | 40.0 | 1 | 0 |
| http-header-checker.underscoredone.com | 40.0 | 1 | 0 |
| asn-lookup.underscoredone.com | 40.0 | 1 | 0 |
| screenshots.underscoredone.com | 40.0 | 1 | 0 |
| cpi-report-us.underscoredone.com | 40.0 | 1 | 0 |
| port-scanner.underscoredone.com | 40.0 | 1 | 0 |
| shopify-ai-rank-checker.underscoredone.com | 40.0 | 1 | 0 |
| dmarc-lookup.underscoredone.com | 40.0 | 1 | 0 |
| seo-data-extractor.underscoredone.com | 40.0 | 1 | 0 |
| hackernews-data.underscoredone.com | 40.0 | 1 | 0 |
| domain-availability-checker.underscoredone.com | 40.0 | 1 | 0 |
| leetspeak-translator.underscoredone.com | 40.0 | 1 | 0 |
| cors-header-checker.underscoredone.com | 40.0 | 1 | 0 |
Verification is earned by measurement, never sold and never self-reported: pass spec + reliability checks over time and deliver on a real paid purchase (rules). Get probed via POST /submit; test your 402 for free at /selftest.
What the 402 Score measures: availability, latency, x402 spec compliance, price integrity and paid delivery - from real requests, by published rules. Scores are never self-reported and never sold.