Signed settlement attestation: we make a REAL x402 purchase from your target endpoint (up to $0.1), grade the delivered response against its advertised schema, and return an EIP-191-signed attestation embedding the on-chain USDC receipt. Proof-of-real-delivery for directories, reputation systems and sellers.

x402 conformance preflight of any endpoint: parses the 402 envelope, lints accepts[] (atomic units, payTo, network), reports the quote, Bazaar extension presence and problems. No purchase is made.

Bulk phone list scrub: up to 100 US numbers per call. Per-number validity, in-service possibility, line type (mobile/landline/VoIP), SMS likelihood, carrier and timezone, plus summary counts. Clean SMS and outreach lists before sending.

US phone carrier lookup: carrier of record, line type (mobile / landline / VoIP / pager), whether the number can be in service at all, rate center and risk hints for any US or US-territory number. NANPA public numbering data refreshed weekly; block-level, so ported numbers keep their original carrier.

NANP area code lookup: region, state, country, timezones, current local time, toll-free/premium/geographic flags. Static authoritative dataset (450 NPAs), sub-10ms responses.

Phone number intelligence: E.164 normalization, validity and plausibility, geography, timezone and current local time, plus carrier of record, line type (mobile/landline/VoIP) and in-service possibility for US numbers.

x402 shop checkup: audits any x402 seller the way uptime raters, index crawlers, paying agents and the CDP Bazaar see it (plain-GET probes, 402 envelopes, sample inputs, discovery files, Bazaar freshness) and returns a graded report with a fix for every finding. Read-only, nothing is purchased.

Can I trust this contact? One risk verdict from a phone number, email address and/or website, built from public data: numbers that can't be in service, VoIP numbers, throwaway or mail-less emails, brand-new or parked domains, bad certificates, email/website mismatches.