x402-domain-check.vercel.app
x402-domain-check.vercel.app · 20 paid endpoints · listed 2026-10-27
Clinical trials search (ClinicalTrials.gov, NLM): filter by condition, intervention/drug, sponsor, status, location. Returns NCT id, title, status, phase, conditions, interventions, sponsor, enrollment, dates, locations summary, link. Not charged on errors.
livelast check 10 h ago
100%valid x402 answers, 72 h
$0.57USDC received on Base, 7 days
4distinct payers, 7 days
56.1score (0-100)
Paid endpoints
| Method | Endpoint | Price | Networks |
|---|---|---|---|
| GET | x402-domain-check.vercel.app/domain/check Domain availability check via RDAP: registered/available, registrar, dates, nameservers | $0.01 | Base |
| GET | x402-domain-check.vercel.app/census/area U.S. area demographics for a street address (Census geocoder -> tract, place, ZIP area, county) or a 5-digit ZIP: population, median age, household and per-capi | $0.02 | Base |
| GET | x402-domain-check.vercel.app/codes/hcpcs HCPCS Level II code search (supplies, DME, drugs, ambulance, etc.) by words or code: short and long descriptions, obsolete / not-otherwise-classified flags, add | $0.02 | Base |
| GET | x402-domain-check.vercel.app/codes/icd10 ICD-10-CM diagnosis code search for medical billing/coding: search by words or code prefix (e.g. 'type 2 diabetes' or 'E11') and get matching codes with officia | $0.02 | Base |
| GET | x402-domain-check.vercel.app/drugs/price US drug acquisition cost from CMS NADAC (National Average Drug Acquisition Cost, weekly): search by drug name (brand or generic, optional strength) or by NDC. R | $0.02 | Base |
| GET | x402-domain-check.vercel.app/econ/treasury U.S. Treasury economic data: daily par yield curve (yields), total public debt (debt), average interest rates on Treasury securities (interest-rates), or Treasu | $0.02 | Base |
| GET | x402-domain-check.vercel.app/fda/adverse-events FDA adverse event (FAERS) summary for a drug via openFDA: total and serious report counts, top reported reactions with counts, reaction outcomes (incl. fatal). | $0.02 | Base |
| GET | x402-domain-check.vercel.app/fda/drug FDA drug label lookup (openFDA SPL): brand/generic names, manufacturer, pharmacologic class, indications, boxed warning, warnings, contraindications, dosage, ad | $0.02 | Base |
| GET | x402-domain-check.vercel.app/fda/recalls FDA recall / enforcement reports (openFDA) for drugs, devices or food, searched by keyword across product, reason and firm, newest first: classification (Class | $0.02 | Base |
| GET | x402-domain-check.vercel.app/federal/awards US federal contracts & grants lookup by company name (USAspending.gov): matched recipients/UEI, total contract and grant obligations, counts, top awards. Not ch | $0.02 | Base |
| GET | x402-domain-check.vercel.app/medicare/fee-schedule Medicare Physician Fee Schedule allowed amount for a CPT/HCPCS code in a payment locality (or national): non-facility and facility prices per modifier (global, | $0.02 | Base |
| GET | x402-domain-check.vercel.app/providers/npi US healthcare provider lookup in the CMS NPPES NPI Registry: by NPI number, or by name/organization, specialty (taxonomy), city, state or ZIP. Returns NPI, indi | $0.02 | Base |
| GET | x402-domain-check.vercel.app/pubmed/search PubMed literature search (NCBI E-utilities): citations with PMID, title, authors, journal, date, publication types, DOI, PMC id and link. Supports PubMed query | $0.02 | Base |
| GET | x402-domain-check.vercel.app/sanctions/search OFAC sanctions screening: fuzzy name search across the U.S. Treasury SDN and Consolidated (non-SDN) lists incl. aliases. Returns scored matches with programs, t | $0.02 | Base |
| GET | x402-domain-check.vercel.app/sec/company SEC EDGAR company lookup by ticker, name or CIK: CIK, legal name, tickers/exchanges, SIC industry, state of incorporation, address, latest XBRL key facts (reven | $0.02 | Base |
| GET | x402-domain-check.vercel.app/sec/insiders SEC Form 4 insider trading summary for a company (ticker, name or CIK): recent Form 4 filings parsed into insider name, role and non-derivative transactions (co | $0.02 | Base |
| GET | x402-domain-check.vercel.app/trials/search Clinical trials search (ClinicalTrials.gov, NLM): filter by condition, intervention/drug, sponsor, status, location. Returns NCT id, title, status, phase, condi | $0.02 | Base |
| GET | x402-domain-check.vercel.app/buyers/award-history Procurement intelligence: prior awards and top recipients for a US federal buyer agency (e.g. Department of Education), optionally narrowed by sub-agency, keywo | $0.05 | Base |
| GET | x402-domain-check.vercel.app/opportunities/changes Material changes to tracked RFP/grant opportunities since a timestamp: deadline moves, budget changes, new amendments, new Q&A, new certification/eligibility re | $0.05 | Base |
| GET | x402-domain-check.vercel.app/opportunities/search RFP / grant opportunity matching for education, nonprofit and public-sector software & services: give a profile (keywords, NAICS, set-asides, states, applicant | $0.05 | Base |
Latest checks
| When | Endpoint | HTTP | ms | Result |
|---|---|---|---|---|
| 10 h ago | x402-domain-check.vercel.app/buyers/award-history | 402 | 241 | valid x402 v2 terms |
Income on Base (7 days)
| Day | Transfers | USDC | |
|---|---|---|---|
| 2026-10-29 | 16 | $0.40 | |
| 2026-10-28 | 4 | $0.08 | |
| 2026-10-27 | 2 | $0.04 | |
| 2026-10-26 | 3 | $0.05 |
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x402_provider_claim (sign with your payout address), and get an alert within minutes when it stops answering with x402_monitor_create ($5 for 30 days). Both work over MCP (https://logicnodes.io/mcp/v2) or POST https://logicnodes.io/v1/tools/<tool>.Income is all USDC received by the provider's payout address on Base, whatever the source. Score: 0-100: 50 x share of checks in the last 72 h that returned valid x402 payment terms + 30 x min(1, log10(1 + USDC received in 7 days) / 4) + 20 x min(1, log10(1 + distinct payers in 7 days) / 3). A provider never checked scores on income only; income is all USDC received by its payout address on Base, whatever the source. JSON: /v1/observatory/providers/x402-domain-check.vercel.app