DNS monitor

For A, AAAA, MX, TXT, and CNAME record assertion with drift alerts.

What it checks

Resolves a hostname against a named resolver and asserts that the answers contain the values you expect. Use it to catch DNS drift, hijacked records, or propagation delays after a migration.

When to use it

• After moving DNS providers — assert the new records are served from every resolver.
• MX records for critical mail domains.
• TXT records (SPF, DKIM, domain-verification keys).
• CNAME chains that must resolve to a specific target.

Config fields

Fields marked * are required.

Example config

{
  "name": "example.com MX",
  "type": "dns",
  "config": {
    "host": "example.com",
    "record_type": "MX",
    "expected_values": ["mail.example.com."],
    "resolver": "1.1.1.1"
  },
  "interval_sec": 300
}