# SPF Authorizes Fastmail Change Watch

> SPF Authorizes Fastmail 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 Fastmail, detecting changes between successive checks and returning before/after diffs

## Facts

- Endpoint: GET https://email.intel.rallylive.ca/watch/email/spf-authorizes/fastmail?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-fastmail-change-watch-00c5a1e6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qCaVEy2PxW5LOacGUhyfn

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-fastmail-change-watch-00c5a1e6
```

Example prompt: Keep an eye on whether example.com's SPF record still authorizes Fastmail — let me know if anything changes compared to last time you checked.

## When to prefer this

Use this endpoint when you want to detect changes in Fastmail SPF authorization over time rather than just a one-time check. It is ideal for scheduled monitoring pipelines, alerting workflows, or audit systems where knowing whether something changed (and exactly what changed) matters more than just the current state. Prefer it over a plain SPF check when historical comparison and drift detection are needed.

## Known failure modes

- Domain not found or has no SPF record — may return a negative result with no change data
- No previous check stored (first call) — 'changed' will be false or null as there is no baseline
- Domain syntax invalid — request may be rejected
- DNS lookup failure via Cloudflare DoH — transient error with no result
- Payment not attached or insufficient — x402 payment required error

## How this service works

Change watch for spf authorizes fastmail: 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 result of whether the domain's SPF record authorizes Fastmail, a 'changed' true/false flag comparing with the previous check (retained for 90 days), a list of fields that changed with before and after values, and a timestamp of when the previous 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-fastmail-change-watch-00c5a1e6/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)