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Lookproof DNS SOA Record Checker
x402
Lookproof DNS SOA Record Checker is a paid API for AI agents from api.lookproof.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-31).
Retrieves and validates a domain's SOA record through public resolvers, checking primary server, contact, serial, and all zone transfer timers against RFC 1912 and RFC 2308.
Price / call$0.01
Success—
StatusUnknown
How this service works
Check SPF, DMARC, DKIM, MTA-STS, DNSSEC and more, with results that explain what was found and why. Free browser checks and a pay-per-request API with x402.
Output
Returns the full SOA record for the queried domain including: primary nameserver, admin contact (formatted as email), serial number (with format detection for YYYYMMDDnn vs counter style), refresh interval, retry interval, expire interval, and negative caching TTL — each validated against RFC 1912 and RFC 2308 recommendations with pass/fail indicators.
Example use cases
Debugging lingering NXDOMAIN responses
“A record I deleted from example.com keeps returning NXDOMAIN — can you check the SOA record for example.com and explain the negative caching TTL so I know how long that'll last?”
Auditing zone transfer configuration
“Check the SOA record for mycompany.org and tell me if the refresh, retry, and expire intervals are within RFC 1912 recommended ranges.”
Identifying primary authoritative server
“Who is the primary nameserver listed in the SOA for github.com, and what's the contact address and current serial number?”
Technical details
Endpoint
GEThttps://api.lookproof.dev/v1/dns/soa?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to inspect or validate the authoritative zone metadata for a domain — especially for debugging DNS negative caching (lingering NXDOMAIN), understanding zone transfer schedules, verifying serial number freshness, or auditing RFC compliance of SOA timer values. Prefer this over a generic DNS lookup tool when RFC 1912 / RFC 2308 compliance context and structured timer interpretation are needed.
Side effects
- Domain not found or does not exist — returns error indicating no SOA record resolvable
- Domain has no SOA record (e.g. subdomain queried instead of zone apex) — may return empty or parent SOA
- Resolver timeout — public resolvers unreachable or slow, returns timeout error
- Invalid domain input — malformed domain string rejected with validation error
- Domain with multiple SOA records (misconfiguration) — may return first encountered or error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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