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spf-authorizes-postmark
x402
spf-authorizes-postmark is a paid API for AI agents from email.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-20).
Checks whether a domain's SPF record authorizes Postmark to send email on its behalf, returning yes/no, the matching mechanism, and the full SPF record.
Price / call$0.01
Success—
StatusUnknown
How this service works
Does the domain's SPF record authorise postmark to send its mail? Reads the SPF TXT record (Cloudflare DoH) and checks for postmark'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 flag indicating whether Postmark is included in the domain's SPF record, the specific SPF mechanism that matched (e.g. include:spf.mtasv.net), and the complete raw SPF TXT record retrieved via Cloudflare DoH.
Example use cases
Verifying Postmark onboarding for new domain
“We just set up Postmark for sending transactional emails from our domain mybrand.io — can you confirm our SPF record is properly configured to authorize Postmark so our emails won't get rejected?”
Auditing vendor email setup before launch
“Before we go live, can you check if notifications.partnerapp.com has Postmark listed in its SPF record and show me the full SPF record and which mechanism matches?”
Investigating unexpected email sender
“I'm seeing emails from support.somecompany.com that claim to come through Postmark — can you verify whether their SPF record actually authorizes Postmark as a sender?”
Technical details
Endpoint
GEThttps://email.intel.rallylive.ca/email/spf-authorizes/postmark?utm_source=zero.xyzWhen to prefer
Use this endpoint when you specifically need to verify Postmark authorization in a domain's SPF record. It is purpose-built for Postmark and uses Cloudflare DoH for reliable DNS resolution, making it faster and more focused than a generic SPF parser. Prefer it over generic DNS tools when checking vendor email deliverability wiring for Postmark specifically, or when auditing whether an unknown sender is legitimately authorized via Postmark.
Side effects
- Domain has no SPF TXT record — returns no authorization with empty record
- Domain does not exist or DNS resolution fails — DNS error returned
- SPF record is malformed or exceeds DNS lookup limit — parsing may fail
- Rate limiting or Cloudflare DoH unavailability — service temporarily unavailable
- No domain query parameter provided — request rejected with input validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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