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DKIM Selector Scanner
x402
DKIM Selector Scanner is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Tests 50 common DKIM selectors against a domain and reports all published DKIM keys with their type and strength, revealing which email services the domain uses.
Price / call$0.01
Success—
StatusUnknown
How this service works
DKIM selector scan: tests 50 common DKIM selectors (Google, Microsoft 365, Mailchimp, SendGrid, Amazon SES, Postmark, HubSpot, Zoho, Proton, Fastmail and more) and reports every published key with its type and estimated strength. Find out which email services a domain signs mail with. $0.01 per domain.
Output
A list of all DKIM selectors that resolved successfully for the domain, including the selector name, the associated email service provider (e.g. Google, Microsoft 365, SendGrid), the key type (e.g. RSA, Ed25519), and an estimated key strength (e.g. 1024-bit, 2048-bit). Selectors with no DNS record are omitted from the results.
Example use cases
Competitor email stack reconnaissance
“Can you check which email services example.com is using by scanning their DKIM selectors? I want to know if they're on Google Workspace, Microsoft 365, Mailchimp, or something else.”
Email deliverability audit
“Run a DKIM selector scan on mybusiness.com and tell me all the DKIM keys that are published — I need to know the key types and whether any are weak.”
Phishing domain investigation
“Scan suspiciousdomain.net for DKIM selectors — I'm investigating whether this domain is set up to send legitimate email through known providers or if it looks sketchy.”
Technical details
Endpoint
GEThttps://intel.rallylive.ca/dns/dkim-selectorsWhen to prefer
Use this endpoint when you need to discover which email sending services a domain has configured, audit a domain's email authentication posture, or investigate email infrastructure without access to the domain's DNS admin panel. It's faster and more comprehensive than manually checking individual selectors because it tests 50 well-known selectors in one call. Prefer this over a generic DNS lookup when you specifically need DKIM intelligence across major providers.
Side effects
- Domain does not exist or has no DNS — returns empty results or DNS error
- Domain has no DKIM records for any of the 50 tested selectors — returns empty list
- Network timeout when querying DNS — may return partial results or error
- Invalid domain format supplied — returns validation error
- Payment failure (x402) — request not processed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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