Wiring email verification into webhook pipelines (n8n, Zapier, Make)

Most data flows in modern stacks pass through n8n, Zapier, or Make. A new lead enters from a Facebook ad, fans out into HubSpot, Slack, and Google Sheets. Adding email verification anywhere in that pipeline is a 5-minute change that improves every downstream tool. Here is how to wire it up.

The integration pattern

All three platforms work the same way: an HTTP node that calls MailoClean's verify endpoint, then a router that branches based on the response.

n8n setup

1. Add an HTTP Request node.
2. Method: POST.
3. URL: https://mailoclean.com/api/v1/verify
4. Authentication: Header Auth → Authorization: Bearer YOUR_API_KEY
5. Content-Type: application/json
6. Body: { "email": "{{ $json.email }}" }
7. Add a Switch node after it.
8. Route on {{ $json.status }}: valid, invalid, disposable, etc.

Wire each route to a different downstream action. Valid leads go to HubSpot. Invalid leads get a Slack ping for manual review. Disposable signups get flagged and dropped.

Zapier setup

1. Add a Webhooks by Zapier step → POST.
2. URL: https://mailoclean.com/api/v1/verify
3. Payload Type: JSON
4. Data: email: {{trigger.email}}
5. Headers: Authorization: Bearer YOUR_API_KEY
6. Add a Filter step after.
7. Filter: Only continue if status equals valid (or whatever statuses you accept).

Make (formerly Integromat) setup

1. Add an HTTP module → "Make a request".
2. URL: https://mailoclean.com/api/v1/verify
3. Method: POST
4. Headers: Authorization: Bearer YOUR_API_KEY, Content-Type: application/json
5. Body Type: Raw, JSON
6. Body: { "email": "{{1.email}}" }
7. Parse response: Yes.
8. Add a Router after to branch on {{2.status}}.

Common pipeline patterns

Facebook Lead Ads + verification + CRM

Triggers on new lead → verify → if valid, push to CRM; if invalid, send to a "needs cleanup" Google Sheet for the SDR to review.

Typeform + verification + Slack

Triggers on form submit → verify → if disposable, Slack alert (someone is trying to game your trial); if valid, send welcome email; if catch-all, tag for engagement tracking.

Webhook from your app + verification + database update

Your app fires a webhook on signup → verification module checks → updates user record with verification status, score, and any flags.

Cost considerations

Each verification call costs one credit. For high-volume pipelines (10k+ leads per month), use the cache and consider batching. MailoClean's API caches results server-side for 24h; repeated calls on the same address within that window do not cost extra.

Error handling

All three platforms have retry policies on HTTP nodes. Configure:

• Timeout: 10 seconds.
• Retries: 3, with exponential backoff.
• On final failure: route to a "needs manual review" branch rather than dropping the lead.

FAQ

Is there a native MailoClean app in these platforms?

Native integrations are on the roadmap. For now the HTTP/webhook setup above works in all three and takes 5 minutes.

Can I run bulk verification through Zapier?

Possible but inefficient. Use the bulk API endpoint directly for batches over 100 addresses.

Plug verification into your pipeline

Get an API key, paste it into n8n/Zapier/Make, route the result. Done in 5 minutes.