InboxGreen API

Built for operators & agencies
Live DNS - no cached APIs
No login required
No data retention
Privacy first diagnostics
Prevents blacklisting - not causes it

Lightweight JSON checks for MX, SPF and DMARC.

This endpoint is for quick automation. For deeper checks (DKIM discovery, List-Unsubscribe, risk scoring), use the Free Checker and then upgrade via FixKit + Monitoring.

Try it now

Use a root domain only (no https://, no paths). 

Click “Run API check” to see the JSON response here.

Endpoint

GET /api/check?domain=example.com

Example

curl "https://inboxgreen.email/api/check?domain=example.com"

CORS & rate limits

  • CORS: * (GET, OPTIONS)
  • Limit: 60 requests / minute per IP

Notes: DNS changes can take time to propagate. If you just updated SPF/DMARC, wait a few minutes and retry.

Managing multiple domains? Monitoring alerts are usually cheaper than building your own polling + incident workflow. See Monitoring.