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Email

Verify email syntax, MX and live mailbox; detect disposable, role and catch-all addresses.

TrustLookup API is a free Email API that requires apiKey authentication, is served over HTTPS and does not support CORS, so it should be called from a server.

Authentication
apiKey
HTTPS
Yes
CORS
No
Category
Email
Uptime (30 days)
100%

Online · 1247 msTested Nov 15, 2026 · checked dailyIs it down? Status & uptime

About TrustLookup

TrustLookup API reference: one endpoint checks phone numbers, emails, IPs and domains. Authentication, examples, every check and its price, errors and webhooks.

Provider
TrustLookup
Website
trustlookup.io ↗

Details from trustlookup.io.

Key facts

  • 100% uptime (30 days)
  • HTTPS
APILayer

Validate emails before they bounce

mailboxlayer checks syntax, MX records and SMTP, and flags disposable addresses, with a free plan to start.

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TrustLookup API FAQ

Who provides the TrustLookup API?

The TrustLookup API is provided by TrustLookup (trustlookup.io). TrustLookup API reference: one endpoint checks phone numbers, emails, IPs and domains. Authentication, examples, every check and its price, errors and webhooks.

Is the TrustLookup API free?

Yes. The TrustLookup API is listed in the Email category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.

Does the TrustLookup API require an API key?

Yes. The TrustLookup API uses apiKey authentication, so you need to register for credentials before making requests.

Can I call the TrustLookup API from the browser?

Not directly. The TrustLookup API does not allow CORS, so call it from a server, serverless function or proxy instead of front-end JavaScript.

Does the TrustLookup API support HTTPS?

Yes. The TrustLookup API is served over HTTPS, so it's safe to use in production.

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Show that TrustLookup is listed on Public APIs. The badge displays its developer rating once it has one.

TrustLookup on Public APIs

Markdown

[![TrustLookup on Public APIs](https://publicapis.lol/badge/trustlookup.svg)](https://publicapis.lol/apis/trustlookup)

HTML

<a href="https://publicapis.lol/apis/trustlookup"><img src="https://publicapis.lol/badge/trustlookup.svg" alt="TrustLookup on Public APIs" height="20"></a>