VerifyPulse
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v1.2 REST API • Sub-200ms DNS & SMTP Verification

Real-time email verification.
Zero deliverability surprises.

Inspect syntax, resolve authoritative MX records, identify catch-all servers, and run zero-send SMTP handshakes. Clean lists without minimums or forced subscriptions.

Verify 100 Emails Free Free Standalone Checker
100 free credits No credit card needed Base USDC & Card
verify_inspector.sh
Latency: < 140ms
Samples:
Drops straight into the outbound stack you already use
Instantly Smartlead Lemlist Apollo.io Clay Make Zapier Google Sheets
Verification Engine

Four-stage inspection pipeline

Every email is processed through rigorous syntax, DNS, and socket verification.

Stage 01

RFC 5322 Syntax

Validates domain syntax, quote characters, and flags common domain typos (e.g. gmai.com).

Stage 02

Disposable Filter

Cross-references against 3,800+ active burner domains and temporary mailbox providers.

Stage 03

DNS MX Resolution

Direct query to authoritative nameservers to verify active Mail Exchanger routing.

Stage 04

Zero-Send SMTP

Emulates an SMTP handshake (HELO, MAIL FROM, RCPT TO) without sending a single email.

Autonomous Agent Layer

Built for AI agents & automated pipelines

No human CAPTCHAs, no credit card lockouts. Native OpenAPI, /llms.txt specification, and Base USDC settlement.

Zero-friction agent onboarding

Autonomous scrapers, cold outreach bots, and AI agents can self-provision API keys with 100 free credits in a single POST request. Top-ups execute autonomously via Base USDC micropayments.

  • Autonomous self-provisioning via /v1/agent/provision
  • Context-optimized /llms.txt standard specification
  • Self-custodial Base USDC micropayments ($0.001 gas) 
# Verify single email address
curl -X POST https://verifypulse-seven.vercel.app/v1/verify \
  -H "X-API-Key: vp_live_..." \
  -H "Content-Type: application/json" \
  -d '{"email": "prospect@target.com"}'
Pricing

Transparent rates. Credits never expire.

Pay only for what you verify. No monthly lock-ins, no forced subscription traps.

Zero-Unknown Billing Guarantee — Only Pay For Conclusive Checks
Legacy tools like NeverBounce & ZeroBounce charge full credits even when emails return "Risky" or "Unknown". VerifyPulse never bills for unknown or unverified addresses. Credits are deducted only on deterministic Valid or Invalid verdicts.
Developer
$0
Free forever
  • 100 free verification credits
  • REST API key access
  • CSV test cleaning (25 rows)
  • Typo fix suggestions
Get Free Key
POPULAR
Micro Starter
$3
One-time pack • $0.001 / check
  • 3,000 verification credits
  • Full CSV bulk cleaning
  • Credits never expire
  • Zero-unknown guarantee
Instant settlement • 0% fee
Growth
$12
One-time pack • $0.0006 / check
  • 20,000 verification credits
  • 20x concurrent cleaning
  • Zero-send SMTP probe
  • Priority processing queue
Instant settlement • 0% fee
Scale
$39
One-time pack • $0.00039 / check
  • 100,000 verification credits
  • Unlimited concurrency
  • Direct webhook ingestion
  • Dedicated support
Instant settlement • 0% fee
Feature VerifyPulse NeverBounce ZeroBounce
Price per 1,000 Checks $1.00 ($3 for 3,000) $8.00 $8.00
Charge for 'Unknown' / Risky $0 (Never Billed) Full credit billed Full credit billed
Expiring Credits Never Expire Monthly Expiry Monthly Expiry
Simulated Port 25 SMTP Handshake Sub-140ms Included Included Included
Autonomous AI Agent Integration /llms.txt + Base L2 Rail None None
Payment Rails Base USDC (0% fee, 1s) Cards only Cards only
Settlement Rail: Base USDC (0x42871B99A3AA942D3B8EC7E43D37979886E856cA) • Instant activation
DONE-FOR-YOU DATA SERVICE

Fresh, Verified Niche B2B Lead Lists

Skip expensive scrapers and bloated databases. We crawl Google Maps, business registries, and websites to extract high-intent local business leads, then run every contact through our zero-send SMTP verification engine.

Free 50-Lead Sample Dataset (Dental Clinics & Labs)
Includes practice name, direct decision-maker email, phone, street, city, website, and verification proof.
Download Free Sample CSV
500 Verified Leads
$15
Flat $15 USDC on Base • Any city/niche
  • 500 decision-maker contacts
  • 100% SMTP verified (<1% bounce)
  • Full addresses, phones, websites
  • Delivered within 4 hours
BEST VALUE
1,500 Verified Leads
$35
Flat $35 USDC on Base • Regional list
  • 1,500 decision-maker contacts
  • 100% SMTP verified (<1% bounce)
  • Google Maps + site enrichment
  • Delivered within 8 hours
5,000 Verified Leads
$99
Flat $99 USDC on Base • Multi-state / Country
  • 5,000 decision-maker contacts
  • 100% SMTP verified (<1% bounce)
  • Deep owner & founder mapping
  • Priority turnaround (24h)
FAQ

Frequently asked questions

Does VerifyPulse send an email to the inbox?

No. VerifyPulse initiates a socket connection to the target mail server on port 25, sends standard SMTP handshake commands (HELO, MAIL FROM, RCPT TO), captures the status code, and terminates the connection before data dispatch.

Do purchased credits expire?

No. Credit packs never expire. Any unused balance remains active indefinitely on your account until consumed.

How can autonomous AI agents use the service?

Agents can call POST /v1/agent/provision with an agent identifier to receive an API key and 100 free credits. When credits run low, agents can transfer Base USDC to our wallet and call the verification webhook.

What is catch-all detection?

A catch-all mail server accepts mail for any address on the domain, even invalid ones. VerifyPulse explicitly tags these as 'risky' with a score breakdown so you can filter your campaigns safely.