1️⃣ Deep SMTP Verification

Checks mailbox existence using safe + throttled SMTP simulation.

2️⃣ Multi-layer Validation

• Syntax validation
• MX record lookup
• Domain existence check
• Provider health check
• SMTP handshake
• Catch-all detection
• Temporary domain detection
• Role-based address detection
• Disposable / spam-trap detection

3️⃣ Real-time API (1ms – 120ms latency)

Built for production apps.

4️⃣ Bulk Email Cleaning Engine

Upload CSV and let the system process millions safely.

5️⃣ Risk Scoring

Each email receives a score from 0–100.

6️⃣ Usage Dashboard & Analytics

Full visibility of historical logs and quality reports.

🧪 Code Snippets

✔ JavaScript (Node.js) API Example

import fetch from "node-fetch"; const API_KEY = "YOUR_API_KEY"; async function verifyEmail(email) { const res = await fetch(`https://api.purechecker.com/v1/verify?email=${email}`, { headers: { Authorization: `Bearer ${API_KEY}`, }, }); const result = await res.json(); console.log(result); } verifyEmail("hello@example.com");

✔ cURL Example

curl -X GET "https://api.purechecker.com/v1/verify?email=test@gmail.com" \ -H "Authorization: Bearer YOUR_API_KEY"

✔ Python Example

import requests API_KEY = "YOUR_API_KEY" URL = "https://api.purechecker.com/v1/verify" params = { "email": "support@example.com" } headers = { "Authorization": f"Bearer {API_KEY}" } response = requests.get(URL, params=params, headers=headers) print(response.json())

📊 Email Verification Result Table

Field

Description

email

The email address you tested

status

valid / invalid / risky / unknown

mx_found

Boolean – MX record exists

smtp_status

mailbox_exists / catch_all / reject

domain_age

Age of domain (days)

provider

Gmail, Outlook, Yahoo, Custom

is_disposable

Detects temporary emails

is_role

admin@, support@, hr@

score

0–100 rating

🖼️ Bulk Upload Feature (Image Placeholder)

https://yourdomain.com/images/bulk-upload-preview.png

⚙️ API Response Example

{ "email": "hello@example.com", "status": "valid", "mx_found": true, "smtp_status": "mailbox_exists", "catch_all": false, "is_disposable": false, "provider": "Gmail", "score": 98, "processed_at": "2025-02-12T10:30:45.000Z" }

📦 Technology Stack

• Next.js 14 (App Router)
• Node.js + Fastify internal worker
• Redis Queue + BullMQ
• PostgreSQL + Prisma ORM
• Cloudflare Workers (for API edge verification)
• Docker + Railway Deployment
• Stripe Billing Integration
• Resend / SendGrid (Email Notifications)
• Sanity CMS for project documentation

📹 Video Demo

https://www.youtube.com/watch?v=YOUR_VIDEO_ID

🧱 Architecture Diagram (Image Placeholder)

https://yourdomain.com/images/purechecker-architecture.png

🛠️ Internal Workflow

1. Request hits the Edge Worker
2. Quick validation (syntax, MX, domain)
3. Job queued → Redis (BullMQ)
4. SMTP Simulation Worker picks job
5. Multiple parallel SMTP attempts
6. Result stored in PostgreSQL
7. Score calculated
8. Dashboard + API returns response

📈 Performance Metrics

Feature

Value

Avg. SMTP verification time

80–120ms

API latency

1–15ms (Edge)

Bulk processing

200K emails/hour

Accuracy

98–99.5%

Availability

99.9%

💰 Pricing Model Example

Tier

Monthly Credits

Price

Starter

10,000

$9

Pro

50,000

$29

Business

200,000

$79

Enterprise

Custom

Contact

🔐 Security Features

• AES-256 encrypted API tokens
• IP allowlist
• Rate limiting per endpoint
• Abuse prevention filters
• Anti-spam honeypot detection
• GDPR compliant email processing

🧭 Use Cases

• SaaS onboarding email validation
• Newsletter signup protection
• CRM database cleaning
• Transactional mailing safety
• Outreach campaign optimization
• Fraud detection & prevention
• Email marketing agencies

❤️ Conclusion

PureChecker delivers a complete, enterprise-grade email verification solution built for scale, speed, and accuracy.
With developer-friendly APIs, powerful dashboard analytics, and strict security, it helps businesses maintain clean mailing lists and maximize deliverability.