# dns-mx-via-mullvad

> dns-mx-via-mullvad is a paid API for AI agents from dns.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-21).

Retrieves MX records for a domain using Mullvad's DNS over HTTPS resolver, returning records, TTL, response code, DNSSEC validation status, and answer time.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/mx/via/mullvad?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dns-mx-via-mullvad-c675e8ee
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UQdrHGj1QZ-vh_l4wZyQo

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 dns-mx-via-mullvad-c675e8ee
```

Example prompt: Can you look up the MX records for gmail.com using the Mullvad DNS resolver and tell me what mail servers it returns, the TTL, and whether DNSSEC was validated?

## When to prefer this

Choose this endpoint when you specifically want MX record data as seen by the Mullvad DNS resolver — useful for comparing resolver-specific answers, detecting geographic or policy-based filtering, verifying DNSSEC enforcement, or checking propagation lag relative to other resolvers. Prefer this over generic DNS tools when resolver identity and DNSSEC validation status matter.

## Known failure modes

- NXDOMAIN response if the domain does not exist
- SERVFAIL if Mullvad's resolver cannot reach authoritative servers
- Empty MX record set if the domain has no MX records configured
- Network timeout if the DoH endpoint is unreachable
- Invalid or malformed domain input may return an error

## How this service works

MX records for a domain as answered by Mullvad DNS (DNS over HTTPS): the records, TTL, response code (NOERROR/NXDOMAIN/SERVFAIL), whether the resolver validated DNSSEC, and the resolver's answer time. Compare resolvers to spot propagation lag, filtering or split-horizon answers. $0.01 per lookup.

## Output

Returns the MX records (mail exchange hostnames and priorities) for the queried domain as answered by Mullvad's DoH resolver, along with the record TTL, DNS response code (NOERROR, NXDOMAIN, or SERVFAIL), a boolean indicating whether the resolver performed DNSSEC validation, and the resolver's answer latency in milliseconds.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/dns-mx-via-mullvad-c675e8ee/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from dns.intel.rallylive.ca](https://www.zero.xyz/host/dns.intel.rallylive.ca/llms.txt)