Truelist
Verifies emails
Hosted MCP Server
npx add-mcp 'https://api.truelist.io/mcp'Installs into Claude Code, Codex, Cursor and more
Documentation
New Deliverability-first cold outbound email infrastructure
The Last EmailValidation Tool You'll Ever Need.
Truelist helps you improve your email reputation, deliverability, and engagement — with pay-as-you-go credits that never expire, or unlimited plans for high volume.
- Cuts through "catch-all" domains with layered validation
- Up to 2x more accurate results than competitors
- Credits that never expire, or unlimited plans — no surprise overages
- Get started in under 2 minutes
No credit card required. Cancel any time.
Truelist
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Upload Your List
Drag and drop or click to upload
CSV, XLS, XLSX up to 10MB
Enterprise-grade security & compliance
verified_user SOC 2 Type II
workspace_premium ISO 27001 Compliant
lock TLS 1.2+ Encryption
public GDPR Compliant
Trusted by teams using
The Problem
You shouldn't have to deal withemail bounces killing deliverability
Other tools
Verifying email
Ready to verify
Truelist
Verifying email
Enhanced
Ready to verify
The other guys
Truelist
Stuck waiting for hours for larger lists to validate.
Fast validation for single emails and large lists.
Emails at catch-all domains come back as "unknown."
Catch-all "unknowns" resolved to valid or invalid.
You waste money and damage sender reputation.
Bounce risk drops and inbox placement improves.
How It Works
Clean, verify, and protect your list in minutes
01
Upload your list or connect via API
Drag and drop a CSV or plug into Zapier, Make, Clay, or your custom stack.
02
We verify every email
We detect invalid, disposable, spam trap, and risky emails with multiple verification strategies.
03
Export or sync a clean list
Automatically push to your ESP, CRM, or cold outreach tool. No manual cleanup needed.
What We Do
What does Truelist do?
Truelist is an email validation tool that protects your brand by removing emails that are likely to bounce, which could harm your sender reputation.
Find and remove invalid emails.
Remove invalid and inactive email addresses, fake users, disposable emails, bots, and spam traps from your email list.
Free to start.
Get 100 free validations with no credit card required. After that, pay-as-you-go credits never expire.
A powerful API and integrations.
Truelist integrates with thousands of tools and platforms, including Clay.com, Zapier, Make.com, ConvertKit, Mailchimp, and more.
Try it out.
Why Truelist
Built differently, on purpose
Unlimited Validation
Credits that never expire
Buy credits when you need them and use them whenever you want. Validate lists, single emails, or real-time inputs, and move to an Unlimited plan if you validate at high volume.
Verify List
Your Lists
Website Signups.csv
0%
0 of 8,127 emails verified
Completed
| List Name | Emails | Uploaded | |
|---|---|---|---|
| Q1 Newsletter | 12,450 | Jan 15, 2026 | Download |
| Conference Leads | 3,892 | Jan 12, 2026 | Download |
Verify Email
Result
Verification Details
Valid email format
MX records found
SMTP verified
Mailbox exists
Not a disposable address
Accept-all domain
Enhanced check passed
Multi-Strategy Validation
We don't stop when the domain says "Accept-All"
Most tools stop at a single check. We don't. Truelist combines multiple validation strategies across SMTP, automated browser checks, and 3rd party APIs to give you the most accurate signal possible.
Our Enhanced Validation strategy delivers up to 2x more accurate results than other providers through advanced heuristics and third-party data cross-referencing.
Advanced Reporting
Real insights into your list health
Bounce risk, reason codes, domain quality, and more — so you can take action confidently.
Reports
Total Emails
0
List Health
0%
0
Ok 0
Risky 0
Invalid 0
Unknown 0
Top Failure Reasons
Mailbox not found 0
Catch-all domain 0
Invalid syntax 0
Developer API
Your API Keys
| Key | Last used |
|---|---|
| tl_live_sk_a1b2...f6g7 | 2 hours ago |
|
{
"email": "test@example.com",
"status": "ok",
"score": 95
}
Real-Time API + Webhooks
Verify as you go with instant feedback
Integrate Truelist into your signup forms or CRMs and stop bad emails before they enter your funnel.
Verification Details
Weed out bad emails before you send
Protect your brand by removing emails that are likely to bounce, which could harm your sender reputation.
SMTP Validation
Validate domains and query SMTP servers to remove invalid, inactive, parked domains, and invalid accounts.
Spam trap checking
Clean spam traps to improve your reputation score and avoid being identified as a spammer.
DNS record checking
Ensure that an email's DNS and MX records are valid.
Disposable emails
Identify and remove disposable email domains from your lists.
Duplicates removal
Identify and remove duplicate emails from your lists.
Accept-all domains
Spot and flag domains that accept any email addresses.
Agent-Native
Built for Claude, Cursor, and agent-first workflows
Our hosted MCP server lets AI assistants validate emails, manage batches, and explore your account through natural-language tool calls. No API keys to copy. OAuth once and you're connected.
smart_toy
Validate from anywhere
Use Claude Desktop, Claude Code, Cursor, or VS Code Copilot. Same verification stack as the API, driven by chat — perfect for ad-hoc list cleanup and prototyping batch jobs.
lock
OAuth, not API keys
Connect once in your browser. Tokens are short-lived and scoped to your account, with no long-lived secrets pasted into config files. Revoke access any time from your Truelist settings.
hub
Seven tools, one server
Single-email validation, batch creation, batch state, account info, and history queries — all the building blocks an agent needs to run real email-hygiene workflows end to end.
Built For You
Who is Truelist for?
Truelist is the perfect solution for businesses and individuals who want to improve their email deliverability and campaign performance — whether it's cold email outreach, marketing campaigns, or transactional emails.
[
contract
SDRs & Account Executives
The perfect complement to your lead generation and cold email marketing tools. It offers reliable email verification at a fraction of the cost, ensuring your emails reach the right inboxes.
Learn more
](https://truelist.io/for/sales)[
stacked_email
Email Marketers
Email marketers can save significantly on email verification costs. Enjoy comprehensive verification services without breaking the bank, making every marketing dollar count.
Learn more
](https://truelist.io/for/marketing)[
hub
Developers & Automation Experts
For those needing a robust list verification API, Truelist is ideal. Pay-as-you-go credits never expire, and Unlimited plans take per-email math off the table at high volume.
Learn more
](https://truelist.io/for/engineering)
What People Say
Trusted by thousands of marketers, founders, and SDRs
The Team
Created by industry veterans
Grant Ammons, Co-founder of Truelist
Corey Haines, Co-founder of Truelist
From the blog
Learn best practices about email marketing and deliverability.
May 19, 2026
How to Find Someones Email on Facebook (A 2026 Guide)
Learn how to find someones email on Facebook with our step-by-step guide. We cover profile checks, search techniques, tools, and the crucial validation step.
Grant Ammons
Founder
May 18, 2026
Welcome Email Sample: 7 Expert Examples and Tips
Find your perfect welcome email sample. We analyze 7 expert examples for SaaS and e-commerce with deliverability tips to boost engagement.
Grant Ammons
Founder
May 17, 2026
The Verification Code Email Guide: Security & Delivery
Learn how to send, secure, and troubleshoot your verification code email. Our guide covers deliverability, templates, security risks, and implementation tips.
Grant Ammons
Founder
FAQ
Frequently asked questions
Can't find the answer you're looking for? Reach out to our customer support team.
What is Truelist?
Truelist is a cutting-edge email validation service designed to improve the accuracy and deliverability of your email campaigns by verifying email addresses in real-time and cleaning email lists.
How does Truelist validate email addresses?
Our service uses advanced algorithms and real-time checking to validate email addresses. This includes checking for format correctness, domain validity, and whether the email address is active and accepting mails.
What are the benefits of using Truelist for email validation?
By using Truelist, you can reduce bounce rates, avoid spam traps, improve your sender reputation, and ultimately increase the effectiveness of your email marketing efforts.
Do credits expire?
No. Pay-as-you-go credits never expire, so you can buy what you need and use it whenever. If you validate at high volume, Unlimited plans include unlimited standard validations.
Is Truelist compliant with data privacy regulations like GDPR?
Yes, we prioritize data security and compliance with global privacy laws, including GDPR. Truelist is SOC 2 Type II certified, meaning our security controls are independently audited and verified. We ensure that all data is handled securely and with the utmost respect for privacy. Learn more about our security practices.
Does Truelist have an API?
Yes, we have a powerful API that allows you to integrate Truelist into your own applications and services. You can find our API documentation here.