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Evaluate a claim or question against one supplied HTML or PDF source and return anchored evidence.

Domain & DNS intelligence — records, SSL certs, subdomain discovery.

Binomial coefficient nCr = n!/(r!(n-r)!), the number of unordered r-subsets of n. Requires r ≤ n and min(r, n-r) ≤ 10000.

Dragons Eye Lookup: Prepaid vendor ransomware watch: up to 25 vendors for 30 days, webhook on new claims. Pay once; each vendor (domain or company name) is re-checked about once a day for 30 days. When one appears in a new ransomware leak-site claim from a commercially reusable source you get an HMAC-signed JSON POST at your https webhook_url (event watch.changed). A watch.created POST is sent rig

x402 market report (PDF) — paid per download

Verify an email address: syntax, MX records, disposable-domain and role-address detection, free-provider flag, quality score 0-100 and verdict. Costs $0.001 USDC per call via x402.

Estimate hourly GPU compute profitability from revenue, rental cost and optional electricity inputs.

Email address verification: syntax, domain, MX records, disposable/free-provider detection, score

Original demonstration CSV integrity report (duplicate normalized rows, invalid email/number/date, formula injection warning, inconsistent row width). Source CSV and code are public/reproducible; purchase is hosted report convenience, not exclusive IP or customer history.

Resolved A/AAAA/CNAME/MX/TXT/NS/CAA from public resolvers with parsed SPF, DMARC and DKIM, for setup verification.

Service: Website URL Extractor (https://url-extractor.x402.paysponge.com/url/:domain)

Convert 1..1000 flat records and at most 64 columns to formula-mitigated CSV. Price: $0.005 USDC per call.

Batch DMARC lookup and parser for 1-20 public domains. Returns record presence, policy, pct, alignment, reporting URIs, raw TXT evidence and validation warnings. All-upstream-failure requests are not settled.

Text-to-structured-JSON extraction: POST plain text, receive emails, phone numbers, dates, monetary amounts and URLs as JSON.

Checks whether a quoted sentence or a claim still appears on the cited page (HTML, PDF or text). Exact, punctuation-insensitive and fuzzy quote matching with snippet; lexical claim check incl. every number; compares with the latest archive.org snapshot when missing; includes the full URL liveness/staleness check.

Slug generator: url-safe slug from unicode text, latin and Cyrillic transliteration

Email provider identification — mailbox host (Google Workspace, Microsoft 365, Zoho, Proton, etc.) plus gateway detection (Mimecast, Proofpoint, Barracuda) from MX records via DNS-over-HTTPS. One domain per call. Tiger Operations. Use when segmenting prospects by email stack and you need to identify a domain's mailbox provider and security gateway.

All common DNS records for a domain via Cloudflare DNS-over-HTTPS: A, AAAA, NS, MX, TXT, CAA.

Extract text from a digital PDF into page-numbered JSON with SHA-256 hashes. No account or API key. 0.005 USDC on Base per successful document via x402. Maximum 2 MiB and 25 pages. No OCR, summaries, URL fetching, or verification of document claims.

Marketing copy quality gate and pre-publish copy review for autonomous agents about to publish or send ad, landing-page, email, CTA, campaign or GTM copy. Returns a fast PASS/WARN/BLOCK verdict, claim-risk flags and prioritized fixes before release. Standard machine terms: https://nexuseval.vercel.app/terms.json 2026-08-29-v2.

Quitar los metadatos de hasta 10 archivos (PDF, Word, Excel, PowerPoint, JPEG, PNG, WebP) y devolver un ZIP con los archivos limpios y un informe.json. Precio por petición, no por archivo. Se puede pagar en eip155:8453: usa la entrada de "accepts" que corresponda a la cartera de tu agente. Si algún archivo no se puede procesar, la petición falla y NO se cobra.

Check 1-2 domains ($0.001 each): A/AAAA/MX/NS/TXT records, SPF parse (all qualifier, includes, lookup count), DMARC parse (policy, pct, rua), DKIM keys at common selectors, RDAP registrar/created/expiry/status, and an A-F grade with reasons.

Linkheft: Domain rank and authority lookups, up to 50 domains a call.

Linkheft: Domain rank and authority lookups, up to 50 domains a call.

Quorum-verified Base USDC receipt across two of three public RPC sources: transaction status, recipient, amount and confirmations

Convert a Gregorian (ISO, Western) calendar date to the Jalali, Solar Hijri, Persian or Shamsi calendar used in Iran. Use it to display a date to Iranian users, to schedule work in the Iranian calendar, or to convert a Gregorian deadline into a Jalali date. Returns the Jalali year, month, day and month name.

falcon.sol: PDF to plain text or markdown for agents and RAG pipelines. Send a URL or base64 PDF (max 60 pages, 4 MB); get page-by-page text in reading order, with automatic local OCR for scanned pages. format=markdown for headings, bullets and table rows. Empty result is not charged. $0.0025 USDC.

Change watch for is email hosted by hostgator mail: runs the check, compares it with the result from your previous call for the same domain (kept 90 days) and returns the current answer, changed true/false, the fields that changed with before/after values, and when it was last seen. Schedule it to be alerted when this changes. $0.02 per check.

Validate an email address: syntax, MX resolution, disposable-domain check.

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