# SPF Authorizes Mailgun Checker

> SPF Authorizes Mailgun Checker is a paid API for AI agents from email.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-24).

Checks whether a domain's SPF record authorizes Mailgun to send email on its behalf, returning yes/no, the matching mechanism, and the full SPF record.

## Facts

- Endpoint: GET https://email.intel.rallylive.ca/email/spf-authorizes/mailgun?utm_source=zero.xyz
- Price: $0.01/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-mailgun-checker-4ab88354
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_iIAcfHUe3FSOO_xA5Lezw

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-mailgun-checker-4ab88354
```

Example prompt: Check whether Mailgun is authorized to send email for rallylive.ca by looking up its SPF record — I need to confirm our Mailgun integration is properly wired for deliverability.

## When to prefer this

Choose this endpoint when you specifically need to confirm whether Mailgun is authorized as an email sender for a domain via SPF, especially for pre-send deliverability checks, onboarding vendor integrations, or auditing unexpected senders. It uses Cloudflare DoH for reliable DNS resolution and returns both the boolean result and the raw mechanism for transparency. Use sibling watch endpoints if you need ongoing change monitoring rather than a one-time check.

## Known failure modes

- Domain has no SPF TXT record — returns no authorization with empty record
- Domain does not exist or DNS lookup fails — returns error from Cloudflare DoH
- SPF record exists but is malformed or exceeds DNS lookup limit — may return inconclusive result
- Rate limiting or upstream Cloudflare DoH unavailability — returns service error
- Missing or invalid domain query parameter — returns bad request error

## How this service works

Does the domain's SPF record authorise mailgun to send its mail? Reads the SPF TXT record (Cloudflare DoH) and checks for mailgun's include/ip mechanisms, returning yes/no, the matching mechanism and the full record. Confirms a vendor integration is wired for deliverability, or spots an unexpected sender. $0.01 per lookup.

## Output

Returns a yes/no authorization result indicating whether Mailgun is permitted by the domain's SPF record, identifies the specific SPF mechanism that matched (e.g. include:mailgun.org or an IP range), and provides the complete raw SPF TXT record retrieved via Cloudflare DNS over HTTPS.

## 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-mailgun-checker-4ab88354/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)