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API Playground

Choose an API, paste your X-API-Key, edit the request parameters, and send a real request from your browser.

All APIs
Email Verification →

Check syntax, MX, SMTP reachability, disposable and role accounts, and an overall quality score.

Try it out

Paste your X-API-Key, edit the request parameters, and send a real request. Useful for integration checks.

POSThttps://openapi.toolkk.com/v1/email-verification

Without an API key the request will go out anonymously and may be rejected by the gateway.

// Response will appear here after you send the request