# Wholesale & White-Label Email Verification API | MailVeri

> Headless white-label OEM & BYOK email verification API for SaaS, ESPs & agencies. Verify 1M emails for $299 ($0.0002/check at 5M) with 99%+ precision.

- **Source**: https://mailveri.com/wholesale-api
- **AI Reference**: https://mailveri.com/llms-full.txt

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Headless OEM & BYOK Verification Infrastructure

Power your ESP, email finder, CRM, lead-distribution engine, or Clay/n8n agency stack with 99%+ deliverability accuracy at **$299 per 1,000,000 checks** (down to **$0.0002/email** at 5M). 100% brand-neutral JSON, Catch-All detection included free, and non-expiring credits.

[Get API Key & 1,000 Free Credits](https://app.mailveri.com/accounts/signup/) · [Request 5,000-Credit Partner Sandbox](https://mailveri.com/contact?subject=wholesale-api)

$0.0002

Lowest unit cost ($999 / 5M)

80% – 90%

Partner resale gross margin

99%+

Deliverability precision

30% Lifetime

Recurring BYOK rev-share

## Two Ways to Monetize & Scale With MailVeri

Whether you want to resell verification credits under your own SaaS brand or let users plug in their own API key, MailVeri adapts to your architecture in under 15 minutes.

Model A • Headless White-Label OEM

### Embed Behind Your Own SaaS UI & Credit Ledger

Call our single-email and batch verification endpoints from your backend using your master API key. Our responses contain pure JSON deliverability data with zero MailVeri branding—allowing you to sell “1-Click List Cleaning” or bundle verification credits inside your own plans.

- **Buy at $0.20–$0.299 / 1K, sell at $1.50–$4.00 / 1K:** Turn email verification from an infrastructure cost center into an 85%+ gross margin profit stream.
- **Zero monthly minimums:** Pay-as-you-go credits never expire, matching seasonal customer demand without fixed overhead.
- **Async batch webhooks:** Dispatch 100K–1M row jobs and receive HMAC-signed completion callbacks automatically.

[Start White-Label Integration](https://app.mailveri.com/accounts/signup/)

Model B • Native BYOK + 30% Rev-Share

### Bring Your Own Key (BYOK) & Agency Handover

Building a WordPress CRM plugin, self-hosted AWS SES newsletter tool, scraper workflow, or Clay/n8n agency workspace? Add MailVeri as a recommended verification provider and link your partner referral URL next to the API key input field.

- **30% lifetime recurring commission:** Earn 30% on every initial and repeat credit top-up your users or agency clients make forever.
- **Zero billing or support overhead:** Users manage their own credit balances while your platform gets credit for saving them up to 90%.
- **Ready-made templates:** Drop-in setups for [Clay HTTP API](https://mailveri.com/integrations/clay), [n8n](https://mailveri.com/integrations/n8n), [Make](https://mailveri.com/integrations/make), and [AI Agent MCP](https://mailveri.com/docs/mcp).

[Explore 30% Lifetime Partner Program](https://mailveri.com/affiliates)

## Wholesale Unit Economics & Resale Margin Table

Most ESPs, CRMs, and data platforms charge end users **$1.50 to $3.00 per 1,000 verifications**. See how much gross margin your platform retains when powered by MailVeri wholesale tiers.

| Monthly Volume | Legacy API Cost | MailVeri Wholesale Cost | Resale Revenue (@ $2/1K) | Your Net Gross Profit | Gross Margin |
| --- | --- | --- | --- | --- | --- |
| 100,000 / mo | $400 – $649 | $59 ($0.00059/ea) | $200 | +$141 / mo | 70.5% |
| 500,000 / mo | $1,500 – $1,800 | $199 ($0.00040/ea) | $1,000 | +$801 / mo | 80.1% |
| 1,000,000 / mo | $2,500 – $3,199 | $299 ($0.000299/ea) | $2,000 | +$1,701 / mo | 85.1% |
| 2,500,000 / mo | $5,500 – $6,500 | $599 ($0.00024/ea) | $5,000 | +$4,401 / mo | 88.0% |
| 5,000,000 / mo | $9,000 – $12,000+ | $999 ($0.00020/ea) | $10,000 | +$9,001 / mo | 90.0% |

All wholesale tiers use non-expiring pay-as-you-go credits with Catch-All detection included at no extra cost. Need 10M–100M+ monthly checks? [Contact us for custom volume allocations](https://mailveri.com/contact?subject=wholesale-enterprise).

## 5 High-Volume Wholesale Use Cases

Designed for platforms where deliverability precision and per-check cost directly determine profitability.

### 1. ESPs, AWS SES Wrappers & WP CRMs

Protect shared sending IPs and prevent [Amazon SES 5% bounce probation](https://mailveri.com/integrations/aws-ses). Automatically scrub newly imported subscriber CSVs or offer profitable 1-Click List Cleaning inside your dashboard.

### 2. Email Finders & B2B Contact Databases

Finding a B2B email often requires testing 3 to 8 naming permutations per prospect. With $0.0002/check pricing, included Catch-All detection, and non-expiring credits, you can verify millions of candidates without blowing up COGS.

### 3. Ping-Post Lead Routing & Referral Gates

Validate inbound leads in real time inside LeadConduit, Phonexa, boberdoo, webinar gates, and paid newsletter networks. Block 100,000+ disposable burner domains and typos before paying $2–$50 per lead.

### 4. AppSumo LTD & Flat-Rate SaaS Relief

Supporting thousands of Lifetime Deal (LTD) or flat-rate unlimited users? Slash your backend verification expense by up to 90% with non-expiring wholesale credits and zero recurring monthly commitments.

### 5. Regional SaaS FX Margin Protection

For B2B platforms in Brazil, Latin America, India, Central Europe, and Southeast Asia billing in local currency (BRL, INR, CZK, PLN, THB), $299/1M wholesale USD pricing preserves healthy SaaS unit economics.

### 6. Clay Studios & Outbound SDR Agencies

Plug your master API key into [Clay HTTP API columns](https://mailveri.com/integrations/clay) (0 Clay credits), [n8n](https://mailveri.com/integrations/n8n), and [Instantly](https://mailveri.com/integrations/instantly)/[Smartlead](https://mailveri.com/integrations/smartlead) pipelines across 20 to 100+ client workspaces.

## Drop-In White-Label API Blueprint

Clean, predictable JSON contracts for both real-time single checks and 1,000,000-row asynchronous batch jobs.

### 1. Real-Time Single Verification Request

```http
POST https://api.mailveri.com/v1/verify-mail/
Authorization: Bearer YOUR_MAILVERI_API_KEY
Content-Type: application/json

{
  "email": "founder@target-company.com"
}
```

### 2. Brand-Neutral JSON Response

```json
{
  "error": 0,
  "message": "Verified founder@target-company.com successfully",
  "status": "VALID",
  "email": "founder@target-company.com",
  "mail": "founder@target-company.com",
  "balance": 999999,
  "credits_used": 1,
  "quality_score": 98,
  "is_forwarding": false
}
```

### 3. Python (FastAPI) White-Label Proxy Endpoint

```python
import os
import requests
from fastapi import FastAPI, HTTPException
from pydantic import BaseModel

app = FastAPI()
MAILVERI_API_KEY = os.environ["MAILVERI_API_KEY"]

class VerifyRequest(BaseModel):
    email: str

@app.post("/api/v1/verify")
def verify_customer_email(payload: VerifyRequest):
    # Forward verification request to MailVeri Wholesale API
    resp = requests.post(
        "https://api.mailveri.com/v1/verify-mail/",
        headers={"Authorization": f"Bearer {MAILVERI_API_KEY}"},
        json={"email": payload.email},
        timeout=15,
    )
    if resp.status_code != 200:
        raise HTTPException(status_code=502, detail="Verification upstream error")

    data = resp.json()
    status = data.get("status")
    # Return 100% custom white-label response under your own SaaS brand
    return {
        "email": data.get("email"),
        "deliverability": status,
        "safe_to_send": status in ("VALID", "ROLE_ACCOUNT"),
        "billable": data.get("credits_used") == 1,
        "quality_score": data.get("quality_score"),
        "is_forwarding": data.get("is_forwarding", False),
    }
```

### 4. Node.js (Express) White-Label Proxy with Zero-Waste Credit Billing

```javascript
// Node.js / Express White-Label Verification Endpoint
app.post('/api/v1/verify', async (req, res) => {
  const { email } = req.body;

  const upstream = await fetch('https://api.mailveri.com/v1/verify-mail/', {
    method: 'POST',
    headers: {
      'Authorization': `Bearer ${process.env.MAILVERI_API_KEY}`,
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({ email }),
  });

  const data = await upstream.json();

  // Deduct 1 credit from your customer's internal SaaS wallet only when credits_used === 1
  const isBillable = data.credits_used === 1;

  return res.json({
    address: data.email,
    verdict: data.status,
    billable: isBillable,
    qualityScore: data.quality_score,
    flags: {
      disposable: data.status === 'DISPOSABLE',
      catchAll: data.status === 'CATCH_ALL',
      roleAccount: data.status === 'ROLE_ACCOUNT',
      forwarding: Boolean(data.is_forwarding),
    },
  });
});
```

### 5. High-Throughput Bulk Batch Dispatch (Up to 1M Rows)

```bash
curl -X POST "https://api.mailveri.com/v1/verify-batch/" \
  -H "Authorization: Bearer YOUR_MAILVERI_API_KEY" \
  -F "file=@customer_upload_250k.csv" \
  -F "webhook_url=https://your-saas.com/webhooks/verification-complete"
```

### 6. Batch Job Initialization Response

```json
{
  "error": 0,
  "job_id": "P2sUEUWEyQXsNzMzE8EXdV",
  "status": "PROCESSING",
  "total_emails": 250000
}
```

## Wholesale & White-Label FAQs

### Is the MailVeri API truly headless and white-label ready?

Yes. Every response from https://api.mailveri.com/v1/ returns clean, brand-neutral JSON containing the verification verdict (VALID, INVALID, CATCH_ALL, DISPOSABLE, ROLE_ACCOUNT, FULL_INBOX, or UNKNOWN) and boolean flags. You can wrap our single-email and bulk batch endpoints behind your own SaaS UI, credit ledger, and custom domain with zero visible MailVeri branding.

### What is the difference between the Headless OEM model and the BYOK Partner model?

In the Headless OEM model, your platform purchases wholesale credits ($299 per 1M or $999 per 5M) using your master API key and bills your customers directly at your own retail markup (often $1.50 to $4.00 per 1,000 checks, yielding 80%–90% gross margin). In the Bring Your Own Key (BYOK) model, you add a "Connect MailVeri API Key" field inside your software or agency workspace and earn a 30% lifetime recurring revenue share on every credit package your referred users purchase.

### Do wholesale verification credits ever expire?

Never. All MailVeri wholesale tiers use 100% pay-as-you-go Universal Credits that remain active indefinitely with zero monthly minimums or forced subscription renewals, allowing your platform to scale smoothly with seasonal customer demand.

### Does Catch-All verification cost extra credits?

No. Unlike providers that charge 3 to 10 credits per email for deeper catch-all checks, MailVeri includes catch-all domain detection, 100,000+ disposable domain filtering, role-account classification, and provider-specific alias normalization at standard 1-credit rates ($0.0002 to $0.000299 per check at wholesale tiers).

### How does wholesale pricing help SaaS products that sold AppSumo Lifetime Deals (LTD) or local-currency plans?

If your SaaS sold Lifetime Deals (LTD) or bills customers in local currencies (such as BRL, INR, CZK, PLN, or THB), paying $0.002–$0.008 per check to legacy USD verification APIs quickly erodes your gross margin. Switching your backend verification calls to MailVeri ($0.0002–$0.000299/check with non-expiring pay-as-you-go credits and zero monthly minimums) cuts verification COGS by up to 90% immediately.

### How can we test MailVeri wholesale accuracy on our own production dataset?

Every new account receives 1,000 free credits immediately upon signup with no credit card required. For established SaaS platforms, ESPs, B2B databases, and outbound agencies evaluating a wholesale migration, contact our partnership team for a complimentary 5,000-credit sandbox allocation to benchmark speed and accuracy side-by-side.

## Ready to Cut Verification COGS by Up to 90%?

Create an account to test immediately with 1,000 free credits, or request a 5,000-credit wholesale partner sandbox for your engineering team.

[Create Free Account](https://app.mailveri.com/accounts/signup/) · [Request 5,000-Credit Partner Sandbox](https://mailveri.com/contact?subject=wholesale-api)

Explore: [Standard PAYG Pricing ($59/100K)](https://mailveri.com/pricing) · [Compare 36 Verifiers →](https://mailveri.com/compare) · [REST API Reference](https://mailveri.com/docs/api) · [MCP Server Docs](https://mailveri.com/docs/mcp) · [Outbound Agencies](https://mailveri.com/industries/outbound-agencies) · [Case Studies](https://mailveri.com/case-studies)

## Frequently Asked Questions

### Is the MailVeri API truly headless and white-label ready?

Yes. Every response from https://api.mailveri.com/v1/ returns clean, brand-neutral JSON containing the verification verdict (VALID, INVALID, CATCH_ALL, DISPOSABLE, ROLE_ACCOUNT, FULL_INBOX, or UNKNOWN) and boolean flags. You can wrap our single-email and bulk batch endpoints behind your own SaaS UI, credit ledger, and custom domain with zero visible MailVeri branding.

### What is the difference between the Headless OEM model and the BYOK Partner model?

In the Headless OEM model, your platform purchases wholesale credits ($299 per 1M or $999 per 5M) using your master API key and bills your customers directly at your own retail markup (often $1.50 to $4.00 per 1,000 checks, yielding 80%–90% gross margin). In the Bring Your Own Key (BYOK) model, you add a "Connect MailVeri API Key" field inside your software or agency workspace and earn a 30% lifetime recurring revenue share on every credit package your referred users purchase.

### Do wholesale verification credits ever expire?

Never. All MailVeri wholesale tiers use 100% pay-as-you-go Universal Credits that remain active indefinitely with zero monthly minimums or forced subscription renewals, allowing your platform to scale smoothly with seasonal customer demand.

### Does Catch-All verification cost extra credits?

No. Unlike providers that charge 3 to 10 credits per email for deeper catch-all checks, MailVeri includes catch-all domain detection, 100,000+ disposable domain filtering, role-account classification, and provider-specific alias normalization at standard 1-credit rates ($0.0002 to $0.000299 per check at wholesale tiers).

### How does wholesale pricing help SaaS products that sold AppSumo Lifetime Deals (LTD) or local-currency plans?

If your SaaS sold Lifetime Deals (LTD) or bills customers in local currencies (such as BRL, INR, CZK, PLN, or THB), paying $0.002–$0.008 per check to legacy USD verification APIs quickly erodes your gross margin. Switching your backend verification calls to MailVeri ($0.0002–$0.000299/check with non-expiring pay-as-you-go credits and zero monthly minimums) cuts verification COGS by up to 90% immediately.

### How can we test MailVeri wholesale accuracy on our own production dataset?

Every new account receives 1,000 free credits immediately upon signup with no credit card required. For established SaaS platforms, ESPs, B2B databases, and outbound agencies evaluating a wholesale migration, contact our partnership team for a complimentary 5,000-credit sandbox allocation to benchmark speed and accuracy side-by-side.