# SparkPost Email Hosting Change Watch

> SparkPost Email Hosting 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 2026-10-20).

Monitors whether a domain's email is hosted by SparkPost, comparing current results against a previous check to detect and report any changes.

## Facts

- Endpoint: GET https://email.intel.rallylive.ca/watch/email/hosted-by/sparkpost?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sparkpost-email-hosting-change-watch-03b919dd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XX1gUjz3_L6XCT2rpVPPr

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 sparkpost-email-hosting-change-watch-03b919dd
```

Example prompt: Keep an eye on whether acmecorp.com has switched to SparkPost for email hosting — let me know if anything changes compared to last time you checked.

## When to prefer this

Use this endpoint when you need to detect changes in SparkPost email hosting over time rather than just a one-time check. It is ideal for scheduled polling workflows where you want to be alerted only when the hosting status actually changes, avoiding noise from repeated identical results. Prefer this over a single point-in-time check when you need audit trails of before/after values and timestamps.

## Known failure modes

- Domain not previously checked — no baseline to compare against, so 'changed' will be null or false
- DNS lookup failure for the domain
- Domain does not exist or is unreachable
- Stale baseline — if more than 90 days have passed since the last check, prior result is purged
- Rate limiting or payment failure ($0.02 USDC required per call)

## How this service works

Change watch for is email hosted by sparkpost: 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 SparkPost email hosting status for the domain, a boolean indicating whether the result changed since the last check (stored for 90 days), the specific fields that changed with their 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/sparkpost-email-hosting-change-watch-03b919dd/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)