Introduction

Prime Verifier API

Verify email deliverability and find professional email addresses over a fast JSON REST API, backed by a live SMTP verification fleet. This is the complete reference: authentication, every endpoint and field, copy-paste code in eight languages, and a live Try it console on every endpoint.

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Base URL

https://api.primeverifier.com

⚿

Auth

Send your key in the X-API-KEY header.

Format

JSON in, JSON out. Every reply is { status, data, error }.

Verify your first email

Verify an email

curl -X POST "https://api.primeverifier.com/v1/verify/single" \
  -H "X-API-KEY: pk_live_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{ "email": "[email protected]" }'

Create a key in your dashboard under Profile, API Keys, then run the call above. See Quickstart for a full walkthrough.

Explore the API

✓

Verify email

Real-time deliverability for one address or a batch, with a graded risk score.

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Find email

Give a name and a company domain, get the most likely deliverable address.

≣

Bulk jobs

Upload a large list, process it in the background, stream progress, download results.

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Webhooks

Get a callback the moment a job finishes, no polling.

How responses work

Every endpoint returns the same envelope, so your integration parses one shape everywhere:

Response envelope

{
  "status": "success",
  "data": { /* the result */ },
  "error": null
}

On failure, status is "error", data is null, and error carries a stable numeric code. See Errors.