# Is Email Hosted By Mailbox.org – Change Watch

> Is Email Hosted By Mailbox.org – Change Watch is a paid API for AI agents from email.intel.rallylive.ca, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-24).

Monitors whether a domain's email is hosted by Mailbox.org and alerts when that status changes, returning current answer, change flag, before/after field diffs, and last-seen timestamp.

## Facts

- Endpoint: GET https://email.intel.rallylive.ca/watch/email/hosted-by/mailbox-org?utm_source=zero.xyz
- Price: $0.02/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-mailbox-org-change-watch-ca8cdb67
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_sy2xWK3LIBEHXQGSteL9R

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-change-watch-ca8cdb67
```

Example prompt: Keep an eye on whether protonmail.com is hosted by Mailbox.org and tell me if that status ever changes — I want to know the before and after values and when it last changed.

## When to prefer this

Use this endpoint when you need to track changes in whether a domain's email is hosted by Mailbox.org over time, rather than just performing a one-time check. It is ideal for scheduled monitoring pipelines, alerting workflows, or competitive intelligence tasks where knowing when the status changed (and what exactly changed) matters more than just the current state.

## Known failure modes

- Domain not previously checked — no baseline exists for comparison, 'changed' will be null or baseline will be set on first call
- DNS resolution failure via Cloudflare DoH — MX records unavailable, check returns error
- Invalid or non-existent domain — lookup fails with error response
- Payment failure — x402 payment not processed, request rejected
- Rate limiting or timeout — upstream DNS query takes too long

## How this service works

Change watch for is email hosted by mailbox org: runs the check, compares it with the result from your previous call for the same domain (kept 90 days) and returns the current answer, changed true/false, the fields that changed with before/after values, and when it was last seen. Schedule it to be alerted when this changes. $0.02 per check.

## Output

Returns whether the domain's email is currently hosted by Mailbox.org (boolean), a 'changed' flag (true/false) compared to the previous call for that domain (retained 90 days), the specific fields that changed with before and after values, and the timestamp of when the status was last seen.

## 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-change-watch-ca8cdb67/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)