Customer onboarding
Verify that a client domain has email auth configured before you send on their behalf.
Intelligence API
Inspect SPF, DKIM selectors, and DMARC in one JSON response—with a 0–100 readiness score. Ideal for onboarding domains, deliverability audits, and abuse triage.
At a glance
Use cases
Verify that a client domain has email auth configured before you send on their behalf.
Score SPF/DKIM/DMARC readiness during support or pre-sales reviews.
Quickly see whether a spoofed brand domain publishes DMARC or open SPF.
Surface auth gaps to shared hosting customers without leaving your stack.
Integration
Subscribe to an Email Auth plan and copy your ea_sec_ secret key.
Call /v1/emailauth/lookup/{domain} or ?domain=.
Use score plus the SPF/DKIM/DMARC objects to decide next remediation steps.
Example
Every response includes a request_id for support correlation.
Rate limit and quota headers are returned on authenticated routes so you can backoff gracefully.
Authenticated with your Syndaq secret key over HTTPS. Lookups never contact a mailbox—only public DNS auth records are evaluated.
curl -s "https://api.syndaq.com/v1/emailauth/lookup/example.com" \
-H "Authorization: Bearer ea_sec_YOUR_SECRET_KEY"{
"success": true,
"domain": "example.com",
"cached": true,
"score": 75,
"spf": { "found": true, "record": "v=spf1 -all" },
"dkim": { "found": false, "selectors": [] },
"dmarc": { "found": true, "record": "v=DMARC1; p=reject;" },
"request_id": "b2c3d4e5f6789012345678901234abcd"
}Reference
Included with your Syndaq Email Auth plan.
| Method | Path | Description |
|---|---|---|
| GET | /v1/emailauth/lookup |
Lookup SPF/DKIM/DMARC by ?domain= query parameter. |
| GET | /v1/emailauth/lookup/{domain} |
Lookup SPF/DKIM/DMARC for a domain in the URL path. |
| GET | /v1/emailauth/status |
Returns plan limits and quota for the authenticated key. |
Pricing
Transparent limits. Upgrade when your traffic grows—no surprise overages without a plan change.
Development and light production lookups.
Higher throughput for production apps.
High-volume lookups with priority limits.
FAQ
Pick a plan, create your keys in the client area, and start calling the API in minutes.
Choose a plan Ask a question