Block Disposable Emails API

What it does

Temporary email abuse destroys signup funnels: fake accounts, trial farming, referral fraud, wasted server resources — especially for AI SaaS where every request costs money. TempMailChecker blocks 277,358+ temporary/disposable email domains with one API call. Returns temp: true/false in sub-ms time across US/EU/Asia endpoints. Works with any product, any stack. Free plan included.

Detect and block disposable email signups with a REST API. One request returns a simple temp boolean. Get 100 free lifetime API checks with no credit card.

New Disposable Domain Report 2026 — our dataset of 335,000+ domains, by the numbers. See the stats → Check disposable and temporary email addresses at signup with one REST request and one boolean response. 335,000+ domains, sub-5ms processing, and 100 free lifetime API checks. Built for real-time signup protection — not temporary inbox creation or full mailbox verification. No credit card required. Call the endpoint from your backend before creating an account. Send an email address or domain, authenticate with your API key, and use the temp boolean to accept, block, challenge, or flag the signup. Use either email or domain . Keep the API key on your server so visitors cannot copy it or…from tempmailchecker.com

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