# Domain Intel – MX Microsoft 365 Checker

> Domain Intel – MX Microsoft 365 Checker 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).

Analyzes a domain's MX records to detect and validate Microsoft 365 mail routing configuration, returning mail policy intelligence alongside WHOIS, DNS, TLS, and subdomain data.

## Facts

- Endpoint: POST https://dns.halowerk.com/domain/articles/mx-microsoft-365?utm_source=zero.xyz
- Price: $0.009/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/domain-intel-mx-microsoft-365-checker-d3f858b4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rVMew0NEjXwQa9icen9Na

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability domain-intel-mx-microsoft-365-checker-d3f858b4 -d '<json body>'
```

Example prompt: Can you check whether contoso.com is currently routing its email through Microsoft 365 — pull the MX records, WHOIS, DNS, TLS cert, and subdomain info while you're at it?

## When to prefer this

Choose this endpoint when you need a no-signup, pay-per-call domain intelligence lookup that specifically highlights Microsoft 365 mail routing, with the added benefit of bundled WHOIS, DNS, TLS, and subdomain data in a single call. Ideal for agents performing one-off domain audits, security recon, or mail configuration validation without committing to a subscription API key.

## Known failure modes

- Domain not found or unresolvable — returns empty or error response
- Invalid domain string exceeding 253 characters — schema validation error
- Baseline object malformed or missing required fields (domain, observed_at, records) — 400 validation error
- Payment not processed via x402 — 402 Payment Required response
- Rate limiting or upstream DNS resolver timeout — transient 5xx error
- Domain exists but has no MX records configured — returns empty MX array

## How this service works

Requires an unauthenticated caller-owned baseline; returns real current NS/MX records, added/removed sets and tri-state target-provider transition. Current DNS comes from one bounded native recursive-resolver query; existing Dossier provides context. Resolver caching may apply; no account ownership or global migration-completion claim. Existing provider patterns are reused without new invented attribution. At most50records,domain253chars,9sbudget; DNSsubquery2s/oneattempt. Unknown provider remai

## Output

Returns a structured payload including WHOIS registration data, full DNS record set, MX records with priority and exchange hostnames, mail policy details (SPF/DKIM/DMARC indicators), TLS certificate metadata, discovered subdomains, and a specific assessment of whether the domain routes mail through Microsoft 365.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "domain": {
   "type": "string",
   "maxLength": 253
  },
  "baseline": {
   "type": "object",
   "required": [
    "domain",
    "observed_at",
    "records"
   ],
   "properties": {
    "domain": {
     "type": "string",
     "maxLength": 253
    },
    "records": {
     "type": "array",
     "items": {
      "type": "object",
      "required": [
       "exchange",
       "priority"
      ],
      "properties": {
       "exchange": {
        "type": "string",
        "maxLength": 254
       },
       "priority": {
        "type": "integer",
        "maximum": 65535,
        "minimum": 0
       }
      },
      "additionalProperties": false
     },
     "maxItems": 50
    },
    "observed_at": {
     "type": "string",
     "maxLength": 40
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/domain-intel-mx-microsoft-365-checker-d3f858b4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from dns.halowerk.com](https://www.zero.xyz/host/dns.halowerk.com/llms.txt)