# MX Record Lookup

> MX Record Lookup is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).

Looks up MX records for a domain, identifies the mail provider (e.g. Google Workspace, Microsoft 365, Zoho, Proton), detects null-MX, and determines whether the domain accepts email.

## Facts

- Endpoint: GET https://intel.rallylive.ca/mx-lookup
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mx-record-lookup-0ee2c310
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pzBQGM92HBzGGX63ia53g

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 mx-record-lookup-0ee2c310
```

Example prompt: What mail provider does acme.com use, and does it actually accept email? Look up its MX records and tell me the hosts and priorities.

## When to prefer this

Choose this endpoint when you need email-routing-specific intelligence beyond a generic DNS lookup — specifically when you want mail provider identification (Google Workspace vs Microsoft 365 vs Zoho etc.), null-MX detection, or a clear yes/no on whether a domain accepts email. Prefer it over a full DNS lookup endpoint when you only care about email routing, as it returns pre-parsed, provider-labeled output rather than raw DNS records.

## Known failure modes

- Domain does not exist (NXDOMAIN) — returns no MX records and email-acceptance false
- Domain has no MX records but is not null-MX — treated as no email acceptance
- Network or DNS resolver timeout — may return an error or empty result
- Unrecognized mail provider — provider field returns null or 'unknown'
- Invalid domain format in query parameter — returns validation error

## How this service works

MX record lookup: the mail exchanger hosts for a domain with priorities, the detected mail provider (Google Workspace, Microsoft 365, Zoho, Proton...), null-MX detection, and whether the domain accepts email at all. Email routing and provider identification. $0.01 per domain.

## Output

Returns the MX records for the domain (hostname and priority for each mail exchanger), the detected mail provider (e.g. Google Workspace, Microsoft 365, Zoho, Proton, or unknown), a null-MX flag indicating if the domain explicitly rejects email, and a boolean indicating whether the domain accepts email at all.

## 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/mx-record-lookup-0ee2c310/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from intel.rallylive.ca](https://www.zero.xyz/host/intel.rallylive.ca/llms.txt)