# is-email-hosted-by-mailbox-org

> is-email-hosted-by-mailbox-org is a paid API for AI agents from email.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-12).

Checks whether a domain's email is hosted by Mailbox.org by querying MX records via Cloudflare DoH and matching against Mailbox.org's mail-exchanger patterns, returning yes/no plus matched hosts.

## Facts

- Endpoint: GET https://email.intel.rallylive.ca/email/hosted-by/mailbox-org?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/is-email-hosted-by-mailbox-org-18f21d17
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_IOJ8ssuN3G87yiy3FOX-b

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-mailbox-org-18f21d17
```

Example prompt: Can you check if acmecorp.com has its email hosted by Mailbox.org? I need to know the MX records it uses and whether any of them match Mailbox.org's pattern.

## When to prefer this

Use this endpoint when you need a fast, single-domain check specifically for Mailbox.org hosting detection, especially for sales intelligence, deliverability auditing, or migration verification workflows. Prefer the bulk sibling endpoint when checking many domains at once. Choose this over generic DNS tools when you need the provider-specific pattern matching logic built in rather than raw MX record lookups.

## Known failure modes

- Domain does not exist or has no MX records — returns no match with empty MX list
- Cloudflare DoH lookup timeout or failure — DNS resolution error
- Domain input missing or malformed — request validation error
- Mailbox.org MX pattern changes not yet reflected — potential false negative

## How this service works

Is the domain's email hosted by mailbox org? Looks up the MX records (Cloudflare DoH) and matches them against mailbox-org'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 boolean indicating whether the domain's email is hosted by Mailbox.org, the full list of MX hosts retrieved via Cloudflare DoH, and which specific MX hosts matched Mailbox.org'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-mailbox-org-18f21d17/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)