# SPF Authorizes Yahoo Change Watch

> SPF Authorizes Yahoo 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 Yahoo mail servers, alerting when the result changes between checks.

## Facts

- Endpoint: GET https://email.intel.rallylive.ca/watch/email/spf-authorizes/yahoo?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-yahoo-change-watch-ce8849ab
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_v6i4fXFJvt8uZceBjHFEz

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-yahoo-change-watch-ce8849ab
```

Example prompt: Keep an eye on whether acmecorp.com's SPF record authorizes Yahoo mail servers, and let me know if anything changes from the last time you checked.

## When to prefer this

Use this endpoint when you need ongoing, scheduled monitoring of whether Yahoo is authorized in a domain's SPF record and want to be alerted only when the answer changes. Prefer this over a one-shot SPF check when you want change detection with before/after diffing and a 90-day history window. Ideal for automated deliverability pipelines, compliance checks, and post-migration verification workflows.

## Known failure modes

- Domain not found or unresolvable — returns error or null result
- No previous check stored (first call) — 'changed' field may be null or false with no before/after diff
- SPF record temporarily unavailable due to DNS propagation — may return stale or inconclusive result
- Rate limiting or payment failure — request rejected at x402 payment layer

## How this service works

Change watch for spf authorizes yahoo: 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 Yahoo is authorized by the domain's SPF record, a 'changed' true/false flag, a list of fields that changed with before/after values, and the timestamp of when the result was last observed. Previous result is retained for 90 days.

## 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-yahoo-change-watch-ce8849ab/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)