Verify Outbound Leads in Clay.
Cut Verification Costs by 85%.
Plug MailVeri into your Clay tables using Clay's native “Import from cURL” action. Verify lead deliverability in real-time, protect cold outreach sender reputation, and stop burning expensive Clay enrichment credits on high-margin third-party verifiers.
How MailVeri Fits Into Your Clay Waterfall
Clay credits are valuable. Placing MailVeri as Tier 1 in your enrichment pipeline instantly validates 80%+ of good leads for pennies before running costly secondary enrichments.
Find Email
Prospect data is ingested into Clay from Apollo, LinkedIn Sales Navigator, or CSV imports.
MailVeri Action
Calls MailVeri real-time API via Clay HTTP Action. Checks live MX records, SMTP ping, and disposable filters.
Extract Verdict
Clay unpacks the JSON payload into columns: status, quality_score, credits_used, and is_forwarding.
Quick Setup: How to Connect MailVeri in Clay in 60 Seconds
- 1Add an HTTP API Column in Clay: In your Clay workbook, click “Add Column” → select “Add Enrichment” → search for “HTTP API” (or Custom HTTP Request).
- 2Import from cURL: In the configuration modal, click the “Import from cURL” button in the top right. Paste the cURL command copied from the top of this page.
- 3Map the Email Column: In the Body box, replace
[email protected]by typing/and selecting your email column pill (e.g./Work Email), and toggle “Remove empty keys” ON. - 4Add Your API Key: In the Headers tab, replace
YOUR_MAILVERI_API_KEYwith your API key from MailVeri Dashboard. - 5Set Run Condition & Rate Limit: Under Run Settings → Only run if, add the non-empty email guard formula below, and set Define rate limit to
10requests per1000ms so 10K+ row workbooks run smoothly without throttling. - 6Run Sample & Save Columns: Click “Test Request”, then click “Add as column” on
status,quality_score, andcredits_used(1for verified verdicts,0ifUNKNOWN).
Clay HTTP API Drawer — Exact Field Reference
| Clay Drawer Field | Exact Value to Enter | Why It Matters |
|---|---|---|
| Method & Endpoint | POST https://api.mailveri.com/v1/verify-mail/ | Real-time single-address verification endpoint |
| Headers | Authorization: Bearer <KEY> • Content-Type: application/json | Authenticates directly against your Universal Credit balance |
| Body (JSON) | {"email": "/Work Email"} | Maps each row's dynamic email pill; enable Remove empty keys |
| Run Settings → Only run if | Boolean({{Work Email}}) && String({{Work Email}}).includes("@") | Skips blank waterfall misses before making an HTTP call |
| Define rate limit | Request Limit: 10 • Duration: 1000 ms | Prevents burst 429 retries across large parallel Clay tables |
curl -X POST "https://api.mailveri.com/v1/verify-mail/" \
-H "Authorization: Bearer YOUR_MAILVERI_API_KEY" \
-H "Content-Type: application/json" \
-d '{"email": "[email protected]"}'{
"email": "/Work Email"
}// Clay Run Settings -> "Only run if" conditional formula:
// Skips blank cells so MailVeri only runs when an email address is present
Boolean({{Work Email}}) && String({{Work Email}}).includes("@")POST https://api.mailveri.com/v1/verify-mail/
Authorization: Bearer YOUR_MAILVERI_API_KEY
Content-Type: application/json
{
"email": "[email protected]"
}{
"error": 0,
"message": "Verified [email protected] successfully",
"status": "VALID",
"mail": "[email protected]",
"email": "[email protected]",
"balance": 4999,
"credits_used": 1,
"quality_score": 99,
"is_forwarding": false
}// In Clay: Add a Formula Column to route leads into Instantly / Smartlead
if (row['mailveri_status'] === 'VALID' && Number(row['mailveri_quality_score'] ?? 0) >= 80) {
return 'Safe to Send';
} else if (row['mailveri_status'] === 'CATCH_ALL' || row['mailveri_status'] === 'ROLE_ACCOUNT') {
return 'Review Catch-All / Role';
} else if (row['mailveri_status'] === 'UNKNOWN') {
return 'Retry Later (credits_used = 0)';
} else {
return 'Do Not Contact';
}Stop Overpaying for Enrichment Waterfall Credits
Compare MailVeri's direct pricing against native Clay credit usage and legacy verification tools:
| Verification Method | Cost per 100K | Cost per 1M | Credit Expiration | Net Outbound Savings |
|---|---|---|---|---|
| MailVeri via Clay HTTP API | $59 | $299$0.30/1k | NEVER ExpireLifetime | BaselineBest Value |
| Clay Native Verifiers (Waterfall) | $1,000 - $2,000+1-2 Clay credits/check | $10,000+Clay credit tiers | Expires MonthlySubscription | Save 94%+ with MailVeri |
| MillionVerifier | $149$1.49/1k | $449$0.45/1k | Never Expire | Save up to 60% with MailVeri |
| BounceBan | $300$3.00/1k | $1,700$1.70/1k | Never Expire | Save 82% with MailVeri |
| NeverBounce | $400$4.00/1k | $2,500$2.50/1k | Expires in 12 Months | Save 85%-88% with MailVeri |
| ZeroBounce | $649$6.49/1k | $3,199$3.20/1k | Expires in 2 Years | Save 91% with MailVeri |
Why Growth Teams & Agencies Connect MailVeri to Clay
Purpose-built for modern cold outreach workflows, SDR pipelines, and high-volume outbound campaigns.
Preserve Clay Credits
Save your high-value Clay credits for AI messaging, phone numbers, and company research rather than burning them on commodity verification.
Protect Sending Domains
Keep your campaign bounce rates strictly below 1.5%. Prevent Google Workspace and Microsoft 365 outbound domain suspensions.
Smart Waterfall Optimization
Run MailVeri as Step 1. Deliverable emails exit the waterfall immediately, cutting downstream tool calls by over 70%.
Frequently Asked Questions
Everything you need to know about integrating MailVeri with Clay.com tables.
Does running MailVeri consume Clay credits?
Using Clay's HTTP API column with your own MailVeri API key consumes 0 Clay enrichment credits on Explorer/Pro+ plans (or 1 standard HTTP action credit on legacy plans), bypassing third-party waterfall verifier markups and saving 85%–95% on verification costs.
How fast is verification when running across thousands of rows?
MailVeri's real-time single verification endpoint responds in real time depending on remote mail server responsiveness. Clay executes HTTP enrichments asynchronously in parallel batches, allowing large tables to populate smoothly.
Can I detect Catch-All and Disposable emails in Clay?
Yes. MailVeri provides granular status classifications including VALID, CATCH_ALL, ROLE_ACCOUNT, DISPOSABLE, and INVALID. You can write Clay formulas to handle each category according to your risk tolerance.
Do MailVeri credits expire if my Clay outreach volume fluctuates?
No. All MailVeri Universal Credits are 100% pay-as-you-go and never expire ($9 for 10K, $59 for 100K, $299 for 1M), so you never lose unused monthly allowances between outbound sprints.
How should I configure Clay Run Settings, Rate Limits, and credits_used?
Under Clay's Run Settings → Only run if, paste Boolean({{Work Email}}) && String({{Work Email}}).includes("@") so empty rows are skipped, and set Define rate limit to 10 requests per 1000 ms. Every API response returns credits_used (1 for conclusive checks, 0 when an unresponsive mail server returns UNKNOWN so zero credits are wasted).
Related Guides for Clay.com Workflows
How to Verify Emails in Clay Using HTTP API: Save 80% on Waterfall Credits
Step-by-step HTTP API column setup and conditional AI prompt gating in Clay.
How to Verify Emails Before Sending in Instantly & Smartlead
Route verified Clay rows into Instantly and Smartlead while keeping bounce rates below 1.5%.
Why Apollo “Verified” Emails Still Bounce (And How to Fix It)
Why static B2B lead sources require a live verification step before cold outreach.
BounceBan & Scrubby Alternative: Catch-All Verification Without $300–$800/100K Fees
Verify corporate catch-all domains and disabled accounts inside Clay at 1 credit flat.
MillionVerifier Pricing & Alternative (2026): Cut HTTP API Costs by 60%
Compare MillionVerifier ($149/100K) vs MailVeri ($59/100K) for Clay HTTP API columns.
ZeroBounce vs NeverBounce vs MailVeri: Save Up to 90% on Bulk Checks
Why GTM engineers replace native Clay verifier add-ons with MailVeri's $0.0002/check API.
Ready to cut your Clay verification costs?
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