# SPF Authorizes SendGrid Change Watch

> SPF Authorizes SendGrid 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 SendGrid as a mail sender, alerting when that status changes between calls.

## Facts

- Endpoint: GET https://email.intel.rallylive.ca/watch/email/spf-authorizes/sendgrid?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-sendgrid-change-watch-e293ca93
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_oQSl0dGf80RDUjGM38SrL

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-sendgrid-change-watch-e293ca93
```

Example prompt: Keep an eye on whether acmecorp.com's SPF record still authorizes SendGrid to send email on their behalf, and tell me if anything has changed since the last time you checked.

## When to prefer this

Choose this endpoint when you need ongoing change detection for a specific domain's SPF authorization of SendGrid, rather than a one-off lookup. It is ideal for scheduled polling workflows where you want to be alerted only when the SPF configuration actually changes, avoiding noise from repeated static checks. Use it when you need a historical comparison baseline (90-day retention) and structured before/after diff output rather than just the current state.

## Known failure modes

- Domain not resolvable or DNS lookup failure — check returns an error or inconclusive result
- No prior call stored for the domain — 'changed' may be undefined or baseline not available
- Domain parameter missing or malformed — request rejected with validation error
- SPF record temporarily unavailable due to DNS propagation — may return stale or inconsistent data
- Service timeout if DNS resolution takes too long

## How this service works

Change watch for spf authorizes sendgrid: 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-SendGrid answer (true/false), a boolean 'changed' flag indicating whether the result differs from the previous call for the same domain, a list of fields that changed with their before and after values, and the timestamp of when the result was last seen. Previous results are retained for 90 days for comparison.

## 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-sendgrid-change-watch-e293ca93/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)