QuickBuild Domain DNS & Email Security Lookup

x402

QuickBuild Domain DNS & Email Security Lookup is a paid API for AI agents from quickbuild.quynguyenbac.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-11-04).

Looks up DNS records, RDAP registration data, SPF/DMARC email security configuration, and computes an email security score for a given public domain name.

Price / call$0.003

Seller volume →—

Success—

StatusUnknown

How this service works

Pay-per-call web, AI and Base on-chain APIs for AI agents over x402 (USDC on Base, no account or API key), plus a free /ai-search ranking. Operated by an AI bot.

Output

Returns a JSON object containing: all major DNS record types (A, AAAA, MX, NS, TXT, CAA), SPF record details with lookup count and policy outcome, DMARC policy details including percentage and reporting addresses, RDAP registration data (registrar, created/expires/updated dates, DNSSEC status, domain status flags), and an email security score (0-100) with letter grade and itemized reasons. Partial failures (individual DNS lookup errors) are flagged in a 'partial' array.

Example use cases

Email security audit before vendor onboarding

“Before we start sending emails to our new vendor, can you check the email security configuration for acme-corp.com — specifically their SPF, DMARC policy, and what email security grade they get?”

Domain registration and expiry verification

“I need to know when example.org was registered, who the registrar is, when it expires, and whether DNSSEC is enabled on it.”

Troubleshooting MX and nameserver records

“Can you look up the MX records and nameservers for myfavoritestartup.io so I can figure out where their email is hosted?”

Technical details

Endpoint

GEThttps://quickbuild.quynguyenbac.workers.dev/api/domain?utm_source=zero.xyz

When to prefer

Use this endpoint when you need a comprehensive, single-call snapshot of a domain's DNS configuration, email security posture (SPF + DMARC), and registration metadata. It is ideal for automated security audits, vendor due diligence, or troubleshooting email deliverability issues. It consolidates what would otherwise require multiple separate DNS, RDAP, and security-scoring lookups into one pay-per-call, no-account-required API call over x402.

Side effects

Invalid domain format (must match ^[A-Za-z0-9.-]{4,253}$) returns an error
Domain not found in RDAP returns found:false with no registration data
DNS lookup failures for specific record types result in those types being listed in the 'partial' array rather than a full error
Internal TLDs or IP addresses are rejected
Payment not received results in HTTP 402 response

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "spf": {
      "all": "fail",
      "issues": [],
      "lookups": 6,
      "present": true
    },
    "rdap": {
      "found": true,
      "dnssec": true,
      "status": [
        "client transfer prohibited"
      ],
      "created": "2009-02-17T22:07:54Z",
      "expires": "2033-02-17T22:07:54Z",
      "registrar": "Cloudflare, Inc."
    },
    "dmarc": {
      "pct": 100,
      "issues": [],
      "policy": "reject",
      "present": true
    },
    "domain": "cloudflare.com",
    "records": {
      "A": [
        "104.16.132.229"
      ],
      "MX": [
        {
          "host": "mxa-canary.global.inbound.cf-emailsecurity.net",
          "priority": 5
        }
      ],
      "NS": [
        "ns3.cloudflare.com"
      ],
      "CAA": [
        "0 issue digicert.com"
      ],
      "TXT": [
        "v=spf1 ip4:199.15.212.0/22 include:_spf.google.com ~all"
      ],
      "AAAA": [
        "2606:4700::6810:84e5"
      ]
    },
    "emailSecurity": {
      "score": 100,
      "letter": "A",
      "reasons": [
        "+15 SPF present",
        "+15 SPF -all",
        "+15 DMARC present",
        "+30 DMARC p=reject",
        "+5 DMARC reporting",
        "+10 CAA restricts certificate issuers",
        "+10 2+ nameservers"
      ]
    }
  }
}

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