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The API-first enrichment layer for AI agents and GTM engineers. Verified contact data, company intelligence, and intent signals — via REST API, CLI, and MCP.

INSIGHTS AND STRATEGIES

B2B Sales & Data Enrichment Blog

Actionable playbooks for email finding, enrichment APIs, deliverability, and outbound pipeline growth.

Featured articles

Best Email Finder Tools in 2026: Complete Comparison Guide

Email Finding16 min read

Best Email Finder Tools in 2026: Complete Comparison Guide

Compare the top email finder tools for B2B sales in 2026. Honest reviews of accuracy, pricing, and features to help you choose the right tool for your team.

Jesse Ouellette

2/18/2026

Best Lead Generation Tools for B2B Sales in 2026

Lead Generation14 min read

Best Lead Generation Tools for B2B Sales in 2026

The ultimate guide to B2B lead generation tools in 2026. From prospecting to enrichment, find the right tools to build pipeline and close deals faster.

Jesse Ouellette

2/18/2026

CLI vs API vs MCP: Which LeadMagic Interface Is Right?

Guide7 min read

CLI vs API vs MCP: Which LeadMagic Interface Is Right?

Three interfaces, one platform, same credits. Here's when to use the REST API, when the CLI is faster, and when MCP inside your AI assistant is the right call.

Patrick Spielmann

2/27/2026

Your Sequencer Says Green, Gmail Says Spam. Audit Now

Email16 min read

Your Sequencer Says Green, Gmail Says Spam. Audit Now

Outbound reply rates flatlining? Stop guessing why. Audit Google Postmaster v2 and Microsoft SNDS now, and use LeadMagic to clean data before you send.

Jesse Ouellette

5/29/2026

Introducing the LeadMagic CLI

Product8 min read

Introducing the LeadMagic CLI

B2B enrichment in your terminal: one-command install, fast CSV enrichment, and plain-English data queries without a browser.

Patrick Spielmann

2/25/2026

MCP Server: LeadMagic in Your AI Assistant

Product11 min read

MCP Server: LeadMagic in Your AI Assistant

Your AI tool can look up live B2B data mid-conversation with 53 enrichment tools in Cursor, Claude, ChatGPT, and more — OAuth sign-in, no API key to paste.

Patrick Spielmann

2/26/2026

Web Scraping for LLM Pipelines: Clean Data for RAG

Web Scraping for LLM Pipelines: Clean Data for RAG

Web scraping for LLM apps — how to collect, clean, and format web data for RAG pipelines. Markdown as the optimal format for AI agents.

Patrick Spielmann

3/1/2026

What Is Data Enrichment? B2B Guide for 2026

Data Enrichment15 min read

What Is Data Enrichment? B2B Guide for 2026

Data enrichment turns incomplete records into actionable prospect profiles. Learn how B2B teams improve sales and operations.

Jesse Ouellette

2/18/2026

More articles

Data Enrichment10 min read

Automated List Enrichment Using MCP

Learn how to use Model Context Protocol (MCP) to automate B2B list enrichment directly inside AI assistants, maintaining clean deliverability and 97% accuracy.

Jesse Ouellette·5/26/2026

Data Quality12 min read

Why B2B Data Accuracy Matters Most in 2026

Bad data destroys your domain reputation and burns your TAM. Here's why 97% accuracy is the new gold standard for outbound.

Jesse Ouellette·3/7/2026

Email Verification20 min read

Best Email Verification Tools in 2026 (10K-Email Test)

I ran 10,000 real B2B emails through 10 verification tools and measured accuracy, speed, catch-all handling, and cost. Here's what actually works.

Jesse Ouellette·2/25/2026

Email Finding9 min read

Bulk Email Finder: How to Find Emails at Scale in 2026

The complete guide to finding valid email addresses in bulk. CSV upload, API batch processing, and the real numbers on what it costs at scale.

Jesse Ouellette·2/24/2026

Email Verification10 min read

Bulk Email Verification: How to Clean Large Lists Fast

Practical guide to cleaning email lists at scale: CSV workflow, 73K-email case study, processing speeds, and provider cost comparisons.

Jesse Ouellette·2/11/2026

Email Verification12 min read

Catch-All Email Verification Guide for Accept-All Domains

40% of enterprise domains are catch-all. Most verifiers label them 'risky.' Here's how we resolve them for real outbound decisions.

Jesse Ouellette·2/18/2026

Clay14 min read

Clay Lead Scoring & Standardized Mapping Blueprint

Build an automated, high-accuracy lead scoring engine in Clay using LeadMagic email verification and job change data.

Jesse Ouellette·5/29/2026

Email22 min read

Your Warmup Pool Is Lying: Cold Email Delivery in 2026

Is your outreach hitting spam? Stop relying on fake warmup tools. Build same-platform OAuth setups and use LeadMagic to verify data with 97% accuracy.

Jesse Ouellette & Patrick Spielmann·5/29/2026

Email Verification8 min read

Disposable Email Detection: Block Temporary Emails at Scale

Disposable emails hurt signup quality and invite abuse. Learn detection methods, where blocklists fail, and how to reduce false positives.

Patrick Spielmann·1/22/2026

Email Verification10 min read

Email Bounce Rate: What It Is and How to Fix It

Hard bounces, soft bounces, catch-all traps — I break down what actually causes high bounce rates and the 7 fixes that brought ours under 0.5%.

Jesse Ouellette·2/14/2026

Email Verification14 min read

Email Deliverability Checklist: 15 Steps for 2026

The 15-step checklist I use to keep bounce rates under 0.5% and inbox placement above 90%. Infrastructure, data quality, sending hygiene — all of it.

Patrick Spielmann·2/4/2026

Developer12 min read

Email Finder API Guide: Code + Integration Patterns

Integrate an email finder API with curl, Python, and Node.js. Includes auth, rate limits, error handling, and batch patterns.

Patrick Spielmann·2/20/2026

Email Finding7 min read

Email Finder vs Verifier: Differences and When You Need Both

Email finders discover email addresses. Email verifiers check if they're real. Here's when you need each — and why the best tools combine both.

Patrick Spielmann·2/12/2026

Email Verification15 min read

Email List Cleaning: The Complete Guide for 2026

Step-by-step guide to email list cleaning with real before/after metrics, catch-all handling, and a cadence that protects sender reputation.

Patrick Spielmann·2/8/2026

Email Finding6 min read

Email Permutator vs Email Finder: Why Guessing Fails

Permutators generate guesses from name patterns. Finders verify the real address. Here's why guessing costs more than teams expect.

Patrick Spielmann·2/14/2026

Email14 min read

Email Validation Best Practices for 2026

Stop guessing, start verifying. Learn email validation nuances, catch-all handling, and why 97% accuracy is the benchmark.

Patrick Spielmann·3/7/2026

Email Verification13 min read

Email Verification API: The Developer's Integration Guide

Integrate email verification with curl, Python, and Node.js. Covers responses, catch-all handling, batching, and production error strategies.

Jesse Ouellette·2/22/2026

Engineering15 min read

The Developer's Guide to B2B Data Enrichment API Integration

Learn how to build a scalable, high-performance data enrichment pipeline using the LeadMagic API. Code examples, error handling, and best practices included.

Jesse Ouellette·7/22/2025

Developer10 min read

How to Extract Text from Any Website (2026 Guide)

How to extract text from any website — browser tools, Python scripts, and APIs. Covers JS-rendered pages and AI-ready output.

Jesse Ouellette·2/21/2026

Email Finding12 min read

How to Find Emails from LinkedIn Profiles Safely

Compliance-safe guide to finding emails from LinkedIn profiles. Compares extensions, manual methods, and URL-based enrichment APIs.

Jesse Ouellette·2/16/2026

Compliance12 min read

GDPR-Compliant B2B Prospecting: A Guide for Sales Teams

Stop fearing GDPR. Learn how to run effective, compliant outbound campaigns using legitimate interest and high-quality data.

Patrick Spielmann·5/12/2025

Developer12 min read

HTML to Markdown (2026): Python, JS, Pandoc & Tools

Convert HTML to clean Markdown with Python, JavaScript, Pandoc, or free online tools. Step-by-step with code examples — plus LeadMagic's instant converter.

Patrick Spielmann·2/17/2026

Email Finding11 min read

How to Find Anyone's Email Address (7 Proven Methods)

Step-by-step guide to finding anyone's email address using 7 proven methods. From email finder tools to Google dorking — tested by someone who built one.

Jesse Ouellette·2/10/2026

Email Verification12 min read

How to Verify an Email Address: 5 Methods That Actually Work

From manual MX lookups to bulk API verification — five practical methods to check if an email address is real, ranked by speed, accuracy, and when to use each.

Patrick Spielmann·1/28/2026

Developer13 min read

How CSS Classes Explode LLM Token Budgets in RAG

Compare HTML and Markdown token consumption in RAG pipelines. Learn how utility classes explode LLM costs by 1100% and how to optimize scraping.

LeadMagic Team·5/29/2026

Developer8 min read

Markdown vs HTML (2026): Which to Use for AI & Web

Markdown vs HTML compared: syntax, performance, and AI pipelines. Why Markdown is ~67% more token-efficient for LLMs — plus when HTML still wins.

Jesse Ouellette·2/25/2026

Sales14 min read

Mobile Outreach: The Secret Weapon for B2B Sales Success

Stop wasting time on office desk phones. Learn how to use mobile outreach to bypass gatekeepers and achieve 5-10x higher connect rates.

Patrick Spielmann·9/15/2025

Developer9 min read

Python Scraper Cheat-sheet: HTML to Markdown for LLMs

A practical Python guide for converting HTML to clean, LLM-ready Markdown. Code snippets for markdownify, html2text, and LeadMagic's scraper API.

LeadMagic Team·5/29/2026

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