# is-email-hosted-by-one-com

> is-email-hosted-by-one-com is a paid API for AI agents from email.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-24).

Checks whether a domain's email is hosted by One.com by looking up its MX records via Cloudflare DoH and matching them against One.com's known mail-exchanger patterns.

## Facts

- Endpoint: GET https://email.intel.rallylive.ca/email/hosted-by/one-com?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-24
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/is-email-hosted-by-one-com-3bf29c19
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xumTtxxhWTJqWm54skouC

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 is-email-hosted-by-one-com-3bf29c19
```

Example prompt: Can you check if example.com has its email hosted by One.com? I need to know whether their MX records point to One.com's mail servers.

## When to prefer this

Use this endpoint when you need to programmatically determine whether a specific domain's email infrastructure is managed by One.com, particularly for sales prospecting (targeting One.com customers), pre-migration audits (confirming current provider), or deliverability investigations. Prefer this over generic MX lookup tools when you specifically need One.com detection logic already built in.

## Known failure modes

- Domain does not exist or has no MX records — returns no match with empty MX list
- DNS lookup failure via Cloudflare DoH — may return an error or timeout
- Domain has MX records but none match One.com patterns — returns 'no' with unmatched hosts listed
- Invalid or malformed domain input — returns an error
- Payment not processed — returns 402 Payment Required

## How this service works

Is the domain's email hosted by one com? Looks up the MX records (Cloudflare DoH) and matches them against one-com's mail-exchanger patterns, returning yes/no, the MX hosts and which matched. Provider detection for deliverability, sales and migration work. $0.01 per lookup.

## Output

Returns a yes/no answer indicating whether the domain's email is hosted by One.com, along with the full list of MX hosts discovered via Cloudflare DoH and which specific MX records matched One.com's known mail-exchanger patterns.

## 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/is-email-hosted-by-one-com-3bf29c19/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from email.intel.rallylive.ca](https://www.zero.xyz/host/email.intel.rallylive.ca/llms.txt)