# SPF Authorizes Mandrill Change Watch

> SPF Authorizes Mandrill 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 Mandrill to send email, alerting when the authorization status changes between checks.

## Facts

- Endpoint: GET https://email.intel.rallylive.ca/watch/email/spf-authorizes/mandrill?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-mandrill-change-watch-75f7e67c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xy5JsVgSdDd8ePLEkJaNR

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-mandrill-change-watch-75f7e67c
```

Example prompt: Watch acmecorp.com for any change in whether its SPF record authorizes Mandrill to send email, and let me know if anything changes from the last time it was checked.

## When to prefer this

Choose this endpoint when you need to detect changes in Mandrill SPF authorization over time rather than just knowing the current state. It is ideal for scheduling periodic checks and receiving a diff-style response (before/after values, changed flag) without building your own state management. Prefer it over the plain SPF-authorizes-Mandrill check when you want to be alerted reactively to changes, and over the bulk variant when you need per-domain change tracking with historical comparison.

## Known failure modes

- Domain not previously checked — no baseline exists so 'changed' cannot be computed on first call
- DNS lookup failure via Cloudflare DoH — returns error if SPF record cannot be retrieved
- Invalid or non-existent domain — returns error or null result
- Payment failure — x402 payment of $0.02 USDC not completed, request rejected
- Baseline expired — previous result older than 90 days is discarded, treated as first call

## How this service works

Change watch for spf authorizes mandrill: 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-Mandrill boolean result, a 'changed' true/false flag indicating whether the answer differs from the previous check (stored up to 90 days), the specific fields that changed with before and 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/spf-authorizes-mandrill-change-watch-75f7e67c/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)