# Is Email Hosted By Titan Watch

> Is Email Hosted By Titan 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).

Change-watch that detects when a domain's email hosting switches to or from Titan, returning current result, change flag, field diffs, and last-seen timestamp.

## Facts

- Endpoint: GET https://email.intel.rallylive.ca/watch/email/hosted-by/titan?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-titan-watch-4af120ad
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hdUFlEKikAH7QCXSCgTk4

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-titan-watch-4af120ad
```

Example prompt: Watch acmecorp.com for me and let me know if their email hosting changes to or from Titan — I want to see whether it's changed since the last check and what exactly is different.

## When to prefer this

Use this endpoint when you need to detect changes in Titan email hosting over time rather than a one-shot check. It is ideal for scheduled polling workflows where you want to be alerted only when the hosting status flips, without storing your own state. Prefer it over a plain is-email-hosted-by-titan check when change detection, before/after diffing, or last-seen timestamps are required.

## Known failure modes

- Domain not previously checked — no baseline for comparison, 'changed' will be null or treated as first-seen
- DNS resolution failure via Cloudflare DoH — MX records unavailable, check may return an error
- Invalid or non-existent domain input — endpoint returns error or empty result
- Stale baseline — if more than 90 days since last call, prior result is purged and no diff is possible
- Payment failure — $0.02 USDC x402 payment not completed, request rejected

## How this service works

Change watch for is email hosted by titan: 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 answer for whether the domain's email is hosted by Titan, a 'changed' true/false flag compared to the previous call (retained for 90 days), a list of fields that changed with before and after values, and the timestamp of when the state 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-titan-watch-4af120ad/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)