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Domain Intel MX Record Change Detector (Posteo) — dns.halowerk.com
x402
Domain Intel MX Record Change Detector (Posteo) — dns.halowerk.com is a paid API for AI agents from dns.halowerk.com, paid per call via x402, $0.009/call, status unknown (last checked 2026-10-13).
Checks whether a domain's MX records have changed relative to a Posteo-observed baseline, returning current DNS, WHOIS, mail policy, TLS, and subdomain data; billed per call in USDC via x402.
Price / call$0.009
Success—
StatusUnknown
How this service works
Domain in, WHOIS, DNS, mail policy, TLS certificate and subdomains out. Pay per call in USDC over x402. No signup, no API key.
Output
Returns current WHOIS registration data, full DNS records, MX records with priorities, mail policy details (SPF/DKIM/DMARC), TLS certificate information, and discovered subdomains for the queried domain. When a baseline is supplied, the response also highlights any changes in MX records relative to that baseline.
Example use cases
Email provider migration detection
“Has acmecorp.com changed its mail servers since 2024-09-15? Back then Posteo saw mx1.posteo.de at priority 10 — tell me if the MX records are different now and show me the current DNS and WHOIS.”
Domain mail security audit
“Pull the full DNS, SPF, DKIM, DMARC, TLS certificate, and subdomains for startup.io — I need to audit their email security posture and want everything in one call.”
Competitor email infrastructure monitoring
“I want to know if rival.com has quietly switched email providers — the last baseline I have from Posteo shows mail.posteo.de priority 20 observed on 2025-01-10. Check if that's still true and return the current mail config.”
Technical details
Endpoint
POSThttps://dns.halowerk.com/domain/articles/mx-posteo?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a no-signup, pay-per-call way to retrieve comprehensive domain intelligence — especially when you want to detect MX record drift against a previously observed Posteo baseline. It bundles WHOIS, DNS, mail policy, TLS, and subdomains into a single call for $0.009 USDC, making it ideal for agents that need ephemeral, cost-accountable domain lookups without API key management.
Side effects
- Domain not found or unresolvable — returns empty or error result
- Payment not received via x402 — 402 response requiring USDC payment
- Malformed domain input exceeding 253 characters — schema validation error
- Baseline records array exceeds 50 items — rejected by schema
- WHOIS rate limiting or registry unavailability — partial result returned
- TLS certificate lookup failure for domains without HTTPS — cert field absent
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| domain | string | |
| baseline | object |
Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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