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Block disposable addresses and obvious typos before creating accounts.
Intelligence API
Validate syntax, catch disposable domains, and confirm MX records exist. v1 does not probe mailboxes or claim full deliverability—so you get fast, honest signals you can ship today.
At a glance
Use cases
Block disposable addresses and obvious typos before creating accounts.
Reject domains with no mail hosts before they pollute your CRM.
Add a cheap secondary check alongside payment fraud scoring.
Batch-scan stored emails for disposable domains and missing MX.
Integration
Subscribe to an Email Validation plan and copy your ev_sec_ secret key.
Call /v1/emailval/lookup/{email} (URL-encoded) or ?email=.
Allow low risk, challenge medium, and block high (disposable or no MX).
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. Honest v1: format, disposable domains, and MX only—no SMTP mailbox probe.
curl -s "https://api.syndaq.com/v1/emailval/lookup/user%40example.com" \
-H "Authorization: Bearer ev_sec_YOUR_SECRET_KEY"{
"success": true,
"email": "[email protected]",
"domain": "example.com",
"cached": true,
"valid_format": true,
"disposable": false,
"has_mx": true,
"mx": ["0 ."],
"risk": { "level": "low", "reasons": [] },
"limits_note": "v1 checks format, disposable domains, and MX records only — not mailbox existence or deliverability.",
"request_id": "e5f6789012345678901234abcdef0123"
}Reference
Included with your Syndaq Email Validation plan.
| Method | Path | Description |
|---|---|---|
| GET | /v1/emailval/lookup |
Validate an email by ?email= query parameter. |
| GET | /v1/emailval/lookup/{email} |
Validate an email in the URL path (URL-encoded). |
| GET | /v1/emailval/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.
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