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SPF Authorizes Slack Checker
x402
SPF Authorizes Slack 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 Slack 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 slack to send its mail? Reads the SPF TXT record (Cloudflare DoH) and checks for slack'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 result indicating whether Slack is authorized by the domain's SPF record, the specific SPF mechanism that matched (e.g. include:mail.slack.com or an IP range), and the complete raw SPF TXT record retrieved via Cloudflare DNS-over-HTTPS.
Example use cases
Slack email deliverability audit
“We just set up Slack email notifications for our domain techcorp.io — can you check if the SPF record actually authorizes Slack to send on our behalf so we know emails won't land in spam?”
Unexpected sender investigation
“We're seeing emails that claim to be from our domain acmeinc.com sent via Slack — can you check our SPF record to confirm whether Slack is actually authorized, or if something looks off?”
Pre-launch vendor integration check
“Before we go live with our Slack-based alerting system for clientfirm.com, can you verify that our SPF record includes Slack as an authorized sender so transactional emails get delivered correctly?”
Technical details
Endpoint
GEThttps://email.intel.rallylive.ca/email/spf-authorizes/slack?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to specifically confirm whether Slack is an authorized email sender for a domain — ideal for auditing vendor email integrations, troubleshooting Slack notification deliverability, or detecting unauthorized senders. Prefer this single-domain endpoint for one-off checks; use the bulk sibling endpoint if checking multiple domains at once.
Side effects
- Domain has no SPF TXT record — returns no authorization with empty record
- Domain does not exist (NXDOMAIN) — DNS lookup fails
- SPF record is malformed or exceeds DNS lookup limit — parsing may be incomplete
- Network or Cloudflare DoH unavailability causes lookup timeout
- Payment not processed (x402) — request blocked before lookup occurs
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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