Bad emails start at capture
A typo or a fake at sign-up stays in your database for good.
Mailcleaner · API and widget
An email validation API and a widget for your sign-up forms.
Verification shouldn't live only in a dashboard. Call the Flaxxa Mailcleaner API from your own code, add the widget to your sign-up forms, subscribe to signed webhooks, and import lists from the email tools you already use.
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mailcleaner.flaxxa.com / api-widget
API
flx_live_••••a1b2 + widget for your forms signed webhooks
- Workspace keys
- REST API
- Addresses per batch
- 1,000
- HMAC-signed
- Webhooks
- For your forms
- Widget
01 / 04
Why verify emails inside your own product?
Dashboards are siloed
If verification only runs in an app, your product never benefits.
CSV shuffling
Exporting lists to clean them and importing them back is slow and error-prone.
02 / 04
How do you add email verification to your app?
Create a key
Make a full-access or read-only key in the app.
Call the API
POST /verify for one address, /verify/batch or /jobs/upload for many.
Add the widget
Drop the script onto your sign-up and lead forms.
Subscribe to webhooks
Get a signed event when a job finishes, instead of polling.
03 / 04
What does the API include?
Verify
Single checks and batches of up to 1,000, with optional depth and typo fixing.
Jobs and files
Upload CSV, TSV, TXT or XLSX, poll status, page through results, export.
Idempotency
Send an Idempotency-Key and a retried request never creates a second job.
Signed webhooks
Jobs, verifications, suppressions and audits, signed and retried.
Form widget
Quick checks on your forms, with allowed websites you set.
Email tool import
Mailchimp, Brevo, MailerLite, GetResponse, ConvertKit, HubSpot and AWeber.
04 / 04
What changes when verification is built in?
Clean data from the first form fill.
Stop bad data at the door
Check addresses before they're stored.
No CSV shuffle
Import from your tools and get results by API.
One balance
API, widget and app all spend the same credits.
Keep exploring
More Mailcleaner capabilities
Email verification
Verify one email address or a whole list: a verdict, a 0–100 risk score and a confidence score for each, from a paste, a file, Google Drive or the API.
Disposable email checker
Check whether an email address uses a disposable (temporary) inbox, in a list or on your sign-up form, plus role addresses like info@ and sales@.
List cleaning
Clean an email list in one upload: counts per verdict, a clean CSV or XLSX export, and a suppression list so bad addresses don't creep back in.
FAQ
API and widget: common questions
Yes. The REST API at https://flaxxa.com/api/v1/mailcleaner verifies one address (POST /verify) or up to 1,000 (POST /verify/batch), uploads files, returns results and manages suppressions and webhooks.
Get started in minutes
Try Flaxxa Mailcleaner free.
Spin up a workspace and put API and widget through its paces.
Free plan · No credit card · Cancel anytime