# Is Email Hosted by One.com – Change Watch

> Is Email Hosted by One.com – 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 One.com (via MX record lookup) and returns a change-detected result comparing the current check against the previous result stored for up to 90 days.

## Facts

- Endpoint: GET https://email.intel.rallylive.ca/watch/email/hosted-by/one-com?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-one-com-change-watch-8d89c760
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_lKO_B4JBHDkvaO36zClSG

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-change-watch-8d89c760
```

Example prompt: Keep an eye on whether acmecorp.com is hosted by One.com for email — let me know as soon as that status changes compared to the last time you checked.

## When to prefer this

Choose this endpoint when you need to detect changes in One.com email hosting status over time rather than just performing a one-time check. It is ideal for scheduled monitoring workflows where you want to be alerted only when something changes, avoiding noise from repeated identical results. Prefer it over the plain check endpoint when you need a before/after diff and a 'changed' flag for event-driven automation.

## Known failure modes

- Domain not provided or malformed — missing required query parameter returns an error
- No previous check stored — if this is the first call for a domain, 'changed' may be undefined or false with no before/after diff
- DNS lookup failure via Cloudflare DoH — transient network errors may produce inconclusive results
- Previous result expired — if more than 90 days have passed since last check, comparison baseline is lost
- Payment failure — x402 payment not completed results in no response

## How this service works

Change watch for is email hosted by one com: 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 the current boolean result indicating if the domain's email is hosted by One.com, a 'changed' true/false flag comparing against the last stored check (retained 90 days), a list of fields that changed with before/after values, and the timestamp of when the result 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-one-com-change-watch-8d89c760/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)