# dns-mx-via-opendns

> dns-mx-via-opendns is a paid API for AI agents from dns.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-22).

Fetches MX records for a domain via OpenDNS (DNS over HTTPS), returning records, TTL, response code, DNSSEC validation status, and resolver answer time.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/mx/via/opendns?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dns-mx-via-opendns-62a08c4e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_aLXPrVGAHZYvOkm_pllab

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-opendns-62a08c4e
```

Example prompt: What MX records does OpenDNS return for gmail.com? I want to see the TTL, response code, whether DNSSEC was validated, and how fast OpenDNS answered.

## When to prefer this

Choose this endpoint when you specifically need to see how OpenDNS resolves MX records for a domain — useful for comparing resolver behavior, detecting propagation lag, identifying filtering (OpenDNS is known for content filtering), or diagnosing split-horizon DNS. Prefer it over generic MX lookups when OpenDNS's perspective is relevant to email routing or security investigations.

## Known failure modes

- Domain does not exist — returns NXDOMAIN response code
- Resolver fails to answer — returns SERVFAIL response code
- No MX records configured for domain — returns NOERROR with empty answer section
- Network timeout reaching OpenDNS — may result in error or no response
- Invalid domain format in query — likely 400 or validation error

## How this service works

MX records for a domain as answered by OpenDNS (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 for the queried domain as answered by OpenDNS via DNS over HTTPS, including the record values (mail server hostnames and priorities), TTL, DNS response code (NOERROR, NXDOMAIN, or SERVFAIL), whether the resolver performed DNSSEC validation, and the resolver's answer time 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-opendns-62a08c4e/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)