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SPF Authorizes SendGrid Checker
x402
SPF Authorizes SendGrid 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 2026-10-16).
Checks whether a domain's SPF record authorizes SendGrid 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 sendgrid to send its mail? Reads the SPF TXT record (Cloudflare DoH) and checks for sendgrid'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 indicating whether the domain's SPF record authorizes SendGrid, the specific SPF mechanism that matched (e.g. include:sendgrid.net), and the full raw SPF TXT record retrieved via Cloudflare DNS-over-HTTPS.
Example use cases
Verify SendGrid onboarding for new domain
“We just set up SendGrid for sending transactional emails from acme.com — can you confirm that acme.com's SPF record actually includes SendGrid so our emails won't land in spam?”
Audit vendor email authorization
“I need to audit which email vendors are authorized by our domain newsletter.io — specifically, does our SPF record authorize SendGrid, and what's the matching mechanism?”
Detect unauthorized SendGrid sender
“Someone claims to be sending email on behalf of partnercompany.com through SendGrid — can you check if partnercompany.com's SPF record actually authorizes SendGrid or if this looks suspicious?”
Technical details
Endpoint
GEThttps://email.intel.rallylive.ca/email/spf-authorizes/sendgrid?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a focused, single-vendor check to confirm SendGrid is authorized in a domain's SPF record — ideal for deliverability audits, vendor onboarding verification, or detecting unauthorized senders. Prefer over generic SPF parsers when the specific question is about SendGrid authorization and you want structured yes/no output with the matching mechanism highlighted.
Side effects
- Domain has no SPF TXT record — returns no authorization with empty record
- Domain does not exist or DNS lookup fails — DNS resolution error
- SPF record exists but SendGrid is not included — returns no with the full record for inspection
- Malformed SPF record that cannot be parsed — may return error or unparseable record string
- Payment not received (x402) — request rejected before lookup is performed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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