SiteCheck DNS Lookup

x402

SiteCheck DNS Lookup is a paid API for AI agents from api.sitecheck-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-14).

Performs a comprehensive DNS lookup for a domain, returning A, MX, NS, TXT, SPF, DMARC, DKIM, BIMI, MTA-STS, and other DNS records along with a mail security grade

Price / call$0.002

Seller volume →—

Success—

StatusUnknown

How this service works

Pay-per-call tools for AI agents: image generation, speech-to-text, text-to-speech, embeddings, LLM chat, website audits and contact enrichment, web page to Markdown reader, PDF to text, sitemap URLs, tech stack detection, translation, exchange rates, e-mail pre-check, domain RDAP/DNS lookup, Solana token checks, trending tokens and wallet holdings, plus business and compliance data (EU VAT/VIES, IBAN, LEI/GLEIF, US recalls, OSHA/EPA violations, UK insolvency notices). Also: SEO metadata, link checking, redirect chains, security headers, mail DNS (SPF, DMARC, DKIM), QR codes, language detection, photo EXIF, identifier validation, image OCR, SEC filings, SEC financials, Congress bills, macro rates, UK company data, GitHub repo stats, Hacker News, Wikipedia, gas prices, Solana swap quotes, ERC-20 token checks, ENS names, EVM wallet balances, EVM balances, transactions and contract calls, Solana transactions and accounts, crypto prices, candles and order books, DeFi TVL, yields and stablecoins, SEC insider trades, weather, geocoding and holidays, IP owners and postcodes, npm, PyPI and crates package data and vulnerabilities, GitHub profiles, arXiv papers and DOIs, structured extraction, summaries, sentiment and reranking, HTML tables and RSS feeds, Bitcoin fees, addresses and transactions, Bitcoin address balances, Bitcoin transaction status, EVM calldata decoding, verified EVM contracts, Hyperliquid perpetual markets, Hyperliquid account positions, Polymarket odds, crypto fear and greed, DeFi fees, DEX volume, company registries of four countries, ISIN, CUSIP and ticker lookup, SEC full-text search, SEC 8-K events, FDA drug labels, FDA adverse event counts, clinical trials, PubMed articles, US federal grants, EU public tenders, NPI provider lookup, US address geocoding, USGS earthquakes, NWS weather alerts, sunrise and moon times, time zone conversion, distance and bearing, GDACS disaster alerts, llms.txt checks, AI crawler access, tracker and cookie audits, certificate transparency, site logos and icons, GitHub releases, GitHub issues, Stack Overflow answers, read-only Wikidata queries, text moderation, image descriptions, text classification, named entity extraction, PII redaction, phone number checks, cron explanations, JSON Schema validation. Plus prediction-market search, briefs, quotes and unsigned buy transactions, powered by Panta. Payment: x402, USDC on Base, Solana or Arc. No signup, no API key.

Output

Returns a JSON object with A, AAAA, MX, NS, TXT, CAA records; parsed SPF, DMARC, and DKIM details; BIMI, MTA-STS, TLS-RPT, and null-MX status; a mail security grade (letter) and score (0-10); a list of detected issues; the DNS data source; and a checkedAt timestamp.

Example use cases

Email deliverability audit for a domain

“Check the mail DNS setup for acme-corp.com — I want to see if SPF, DMARC, and DKIM are all properly configured and what issues might be hurting email deliverability.”

Nameserver and A record verification

“What are the nameservers and A records for shopify.com right now? I need to confirm DNS propagation went through correctly.”

Competitor mail security benchmarking

“Pull the DNS records for hubspot.com and give me the mail security grade — I'm benchmarking how well they've locked down their email infrastructure.”

Technical details

Endpoint

GEThttps://api.sitecheck-api.workers.dev/api/dns?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need a comprehensive, single-call DNS audit covering both raw records and mail security analysis (SPF/DMARC/DKIM/MTA-STS) with a summarized mail grade. It is better than a bare dig or nslookup when you want structured, parsed DNS output plus actionable issue detection in one response, and when you want to pay per call with no API key signup.

Side effects

Domain does not exist — exists field returns false
Invalid or malformed domain input — request may fail or return empty records
DKIM selectors not found under common names — returns empty found array with checked selectors listed
Some record types absent (e.g. no MX, no SPF) — fields returned as null or empty array
Temporary DNS resolution failure from upstream Cloudflare or Google resolvers

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "a": [
      "93.184.216.34"
    ],
    "mx": [],
    "ns": [
      "a.iana-servers.net",
      "b.iana-servers.net"
    ],
    "caa": [
      {
        "tag": "issue",
        "flags": 0,
        "value": "letsencrypt.org"
      }
    ],
    "spf": {
      "all": "-",
      "record": "v=spf1 -all",
      "lookups": 0,
      "mechanisms": [
        "-all"
      ]
    },
    "txt": [
      "v=spf1 -all"
    ],
    "aaaa": [
      "2606:2800:220:1:248:1893:25c8:1946"
    ],
    "bimi": null,
    "dkim": {
      "found": [],
      "selectorsChecked": [
        "default",
        "google",
        "selector1",
        "selector2",
        "k1",
        "s1",
        "s2",
        "mail",
        "dkim"
      ]
    },
    "dmarc": {
      "pct": 100,
      "rua": null,
      "policy": "reject",
      "record": "v=DMARC1; p=reject",
      "subdomainPolicy": null
    },
    "domain": "example.com",
    "exists": true,
    "issues": [
      "no DKIM key under the common selectors (a key with another selector is not visible)",
      "no MTA-STS policy"
    ],
    "mtaSts": null,
    "nullMx": false,
    "source": "DNS over HTTPS (Cloudflare, Google)",
    "tlsRpt": null,
    "checkedAt": "2026-10-13T09:00:00.000Z",
    "mailGrade": "B",
    "mailScore": 7
  }
}

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