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DKIM SMTPAPI Selector Change Watch
x402
DKIM SMTPAPI Selector Change Watch is a paid API for AI agents from dns.intel.rallylive.ca, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-20).
Monitors the DKIM DNS record for the 'smtpapi' selector and alerts when it changes by comparing the current result against the last recorded value (stored for 90 days).
Price / call$0.02
Success—
StatusUnknown
How this service works
Change watch for dkim selector smtpapi: 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 DKIM smtpapi selector record, a boolean indicating whether it has changed since the previous call, a list of fields that changed with their before and after values, and the timestamp of when it was last seen. The previous result is retained for 90 days.
Example use cases
Email deliverability change detection
“Keep an eye on the smtpapi DKIM selector for sendgrid.com — let me know immediately if the DNS record changes and what specifically is different from before.”
Security audit for DKIM rotation
“Has the smtpapi DKIM selector record for mycompany.com changed at all since the last check? I need to verify whether our DKIM key rotation went through correctly.”
Third-party ESP monitoring
“Monitor the smtpapi DKIM selector for our email service provider's domain vendor.io and alert me whenever it changes so I can make sure we're not broken.”
Technical details
Endpoint
GEThttps://dns.intel.rallylive.ca/watch/dns/dkim/smtpapi?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to continuously monitor whether the DKIM smtpapi selector DNS record for a specific domain has changed over time, particularly for detecting email authentication key rotations, unauthorized modifications, or ESP configuration changes. Prefer this over a plain DKIM lookup endpoint when change detection and alerting are the primary goal rather than a one-time record retrieval.
Side effects
- Domain not found or DNS lookup failure returns an error or NXDOMAIN response
- No previous record exists for the domain (first call returns changed: null or false with no before value)
- Previous record expired after 90 days, resulting in no baseline for comparison
- Malformed domain input causing query failure
- Rate limiting or payment failure preventing the check from running
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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