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Welcome to the Leads Sentry documentation. This guide covers both the desktop verification platform and the Free Tools hub so your team can run deep list cleaning and quick daily diagnostics in one workflow.

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Quick Start

Get up and running in under 5 minutes

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API Reference

Complete API documentation

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Support

Get help when you need it

Quick Start Guide

Follow these steps to start verifying emails and using the Free Tools workflow with Leads Sentry:

1

Create an Account

Sign up for a free account at leadssentry.com/register. No credit card required to get started.

2

Download the App

Download the Leads Sentry desktop application for Windows, macOS, or Linux from your dashboard.

3

Get Your API Key

Navigate to Settings → API Keys in your dashboard to generate your API key.

4

Start Verifying

Use the app or API to start verifying emails immediately.

5

Use Free Tools for Quick Checks

Run SPF, DMARC, MX, DNS, and related checks in Free Tools before campaign sends.

Installation

Leads Sentry is available as a desktop application for all major platforms.

System Requirements

  • Windows: Windows 10 or later, 4GB RAM, 100MB free space
  • macOS: macOS 10.15 or later, 4GB RAM, 100MB free space
  • Linux: Ubuntu 18.04+ or equivalent, 4GB RAM, 100MB free space

Download & Install

# Windows (PowerShell)
Invoke-WebRequest -Uri "https://leadssentry.com/download/windows" -OutFile "LeadsSentry-Setup.exe"
.\LeadsSentry-Setup.exe

# macOS (Terminal)
curl -O https://leadssentry.com/download/macossudo installer -pkg LeadsSentry.pkg -target /

# Linux (Terminal)
wget https://leadssentry.com/download/linuxsudo dpkg -i leads-sentry.deb

Authentication

All API requests require authentication using your API key. Include your key in the Authorization header.

Authorization: Bearer YOUR_API_KEY

Example Request

curl -X POST https://leadssentry.com/api/v1/verify \
  -H "Authorization: Bearer ls_live_xxxxxxxxxxxxxxxx" \
  -H "Content-Type: application/json" \
  -d '{"email": "user@example.com"}'

API Overview

The Leads Sentry API is organized around REST. Our API has predictable resource-oriented URLs, accepts JSON request bodies, returns JSON-encoded responses, and uses standard HTTP response codes.

Base URL

https://leadssentry.com/api/v1

Rate Limits

Plan Rate Limit
Free 100 requests/minute
Professional 1,000 requests/minute
Enterprise 10,000 requests/minute

Verify Single Email

Verify a single email address through our six-layer verification engine.

Endpoint

POST /verify

Request Body

{
  "email": "user@example.com",
  "check_catch_all": true,
  "check_role": true
}

Response

{
  "success": true,
  "email": "user@example.com",
  "status": "valid",
  "score": 98,
  "checks": {
    "syntax": true,
    "dns": true,
    "smtp": true,
    "catch_all": false,
    "role": false,
    "disposable": false
  },
  "suggested_correction": null
}

Support

Need help? Our team is here to assist you.

email

Email Support

Response within 24 hours

support@leadssentry.com
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Live Chat

Available for Professional+ plans

Start a conversation
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