# SPF Authorizes Greenhouse Change Watch

> SPF Authorizes Greenhouse 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 SPF record authorizes Greenhouse (greenhouse.io) as a mail sender and alerts when that authorization status changes.

## Facts

- Endpoint: GET https://email.intel.rallylive.ca/watch/email/spf-authorizes/greenhouse?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/spf-authorizes-greenhouse-change-watch-bd1b5e46
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_IAA6KQRkN4YBU3IKGWNtK

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 spf-authorizes-greenhouse-change-watch-bd1b5e46
```

Example prompt: Keep an eye on whether acmecorp.com's SPF record still authorizes Greenhouse as a mail sender — let me know as soon as the authorization status changes compared to the last check.

## When to prefer this

Use this endpoint when you need to continuously monitor whether a specific domain's SPF record authorizes Greenhouse as a mail sender and want automatic change detection with before/after diffing. Prefer it over a one-shot SPF check when you need alerting on drift — e.g. when a customer removes Greenhouse from SPF unexpectedly, causing email delivery failures for ATS-generated messages.

## Known failure modes

- Domain not found or invalid — DNS lookup fails and no result is returned
- No prior check stored for the domain — first call has no baseline to compare against so changed will be false
- DNS timeout or Cloudflare DoH unreachable — check cannot complete
- Payment of $0.02 USDC not fulfilled — request rejected via x402 payment required response
- SPF record is absent or malformed — result may be indeterminate

## How this service works

Change watch for spf authorizes greenhouse: 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 SPF-authorizes-Greenhouse boolean answer, a changed true/false flag comparing to the previous call for the same domain (retained 90 days), the specific fields that changed with before/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/spf-authorizes-greenhouse-change-watch-bd1b5e46/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)