Verify at signup, or clean a list you already have.
One endpoint for single addresses, one for files. Available on the free tier — test it with your 100 free credits before you buy anything.
curl -X POST https://events.zylentix.com/api/v1/verify \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"email": "maya.chen@northwind-studio.com"}'
{
"email": "maya.chen@northwind-studio.com",
"verdict": "DELIVERABLE",
"sub_reason": "",
"confidence": 98,
"free_provider": false,
"mx_provider": "Google Workspace",
"did_you_mean": ""
}
Endpoints
| Method | Path | What it does |
|---|---|---|
| POST | /api/v1/verify | Verify one address, synchronously. Unknown results are not charged. |
| POST | /api/v1/uploads | Get a presigned target and upload a file straight to storage. |
| POST | /api/v1/batches | Create a list from an upload or an inline array. Returns the quote. |
| POST | /api/v1/batches/{id}/start | Start verification. Holds exactly the quoted credits. |
| GET | /api/v1/batches/{id}/progress/poll | Rows processed, rate, state and the verdict breakdown so far. |
| GET | /api/v1/batches/{id}/results | Paginated results, filterable by verdict. |
| GET | /api/v1/batches/{id}/download/{type} | Full, deliverable-only, suppression list, or JSON summary. |
| DELETE | /api/v1/batches/{id} | Destroy the list and its results immediately. |
| GET | /api/v1/credits | Balance, held credits and recent ledger movements. |
| POST | /api/v1/webhooks | Register a signed callback for batch events. |
Every mutating endpoint accepts an Idempotency-Key header. Retrying with the same key replays the original response instead of doing — or charging — the work twice.
Getting results out
Available today, on every plan including the free tier.
Direct ESP and CRM connectors
One-click sync into Mailchimp, Klaviyo, HubSpot, Salesforce and the rest is on the roadmap, not shipped. Today you move lists with CSV exports or the API, both of which every one of those tools imports natively. We would rather say that plainly than list logos we cannot yet stand behind.