Email validation
Free email validation tools.
Email verification API
100 validations a month, no card.
The free tools handle one address at a time. The API handles thousands, from your backend, with the same checks and one JSON response.
Get your free API keyFree email tools.
Run a quick check on any address without an account or API key.
Email Verifier
Check syntax, MX records, SMTP deliverability, and disposable domain status for any email address.
Open toolEmail Syntax Checker
Validate that an email address follows RFC 5322 formatting rules before it touches your system.
Open toolEmail Existence Checker
Probe the destination mail server to confirm whether a specific mailbox actually exists.
Open toolCatch-All Email Checker
Detect whether a domain accepts mail for every address, which makes SMTP probing unreliable.
Open toolTemporary Email Checker
Find out if an address belongs to a throwaway inbox service like Mailinator or Temp-Mail.
Open toolDomain Age Checker
Look up when a domain was first registered to spot newly minted addresses used in fraud.
Open toolAPI and developers.
Integrate email validation directly into your product or workflow.
Email Verification API
Validate any email address for syntax, deliverability, disposable domains, catch-all behavior, and more in one call.
Open toolDisposable Emails
Browse the database of disposable and throwaway email domains that Trueguard flags automatically.
Open toolTemporary Email Sending
Learn how temporary email senders operate and how Trueguard detects them at signup.
Open toolAPI Documentation
Full reference for the email validation API: endpoints, parameters, response fields, and code samples.
Open toolIntegrations and guides.
Call the email validation API from your language or stack, with working code.
Email Validation in JavaScript
Validate any email address from JavaScript or Node.js with one API call. Code samples, error handling, and the real JSON response shape.
Open toolEmail Validation in Python
Validate any email address from Python with one API call using requests or httpx. Code samples, error handling, and the real JSON response shape.
Open toolEmail Validation in PHP
Validate any email address from PHP with one API call using Guzzle or cURL. Code samples, error handling, and the real JSON response shape.
Open toolUse cases.
Deploy email validation by context: signup forms, lead capture, fraud detection, and platform integrations.
Signup Form Email Validation
Validate each address at registration, before the account is created. Block fake, mistyped, and disposable emails at the form.
Open toolLead Form Email Verification
Verify email on lead capture forms before junk addresses sync to your CRM. Flag disposable and undeliverable leads at capture.
Open toolEmail Validation for Fraud Teams
Use email as a standalone risk signal to catch disposable and fake addresses. A separate product you own and run yourself.
Open toolHubSpot Email Validation
Validate emails for HubSpot forms and contacts via Trueguard's API, before they become contacts. No native marketplace app required.
Open toolComparisons.
See how Trueguard email validation compares to other providers.
Verifalia vs Trueguard
Flat $49.99 a month for 50,000 versus Verifalia's $219 per 50,000, compared feature by feature.
View comparisonAbstract API vs Trueguard
Flat $49.99 a month for 50,000 versus Abstract's comparable Professional tier at $199 a month, compared feature by feature.
View comparisonZeroBounce vs Trueguard
Flat $49.99 a month for 50,000 versus $379 a month for the same 50,000 on ZeroBounce ONE, compared feature by feature.
View comparisonCheapest Email Verification API
$49.99 a month for 50,000 validations against nine providers, from DeBounce at $69.00 to ZeroBounce at $379.
View comparison
Need validation at scale?
The free tools above handle one address at a time. The API handles thousands. One endpoint, nine code samples, 100 free validations a month with no credit card required.
Get your free API keyNo credit card required.
