IN THE FIELD GUIDE
Isdisposable
isdisposable.com
Prevent fake signups by blocking disposable email addresses during user registration. Offline npm package with 160k+ disposable domains for instant detection without network requests. Real-time DNS and MX record analysis to detect new disposable email services not in blocklists.
THE PRODUCT, BEYOND THE PITCH
Editorially reviewed · Sources checked Oct 7, 2026
A good fit for
- Developers integrating disposable email detection into SaaS applications to improve signup quality.
- Teams needing scalable email validation with real-time detection and analytics for growing user bases.
Know the limitations
- Offline npm package only detects known disposable domains and does not perform real-time DNS checks.
- API requests exceeding monthly limits return a 429 error; npm package can still be used offline.
What you can do
- Prevent fake signups by blocking disposable email addresses during user registration.
- Analyze signup data with dashboard analytics to track block rates, top disposable domains, and money saved.
Features
- Offline npm package with 160k+ disposable domains for instant detection without network requests.
- Real-time DNS and MX record analysis to detect new disposable email services not in blocklists.
- Risk scoring system that assigns a 0-100 score per email combining multiple detection signals.
- Custom allow/blocklist to override detection for specific domains, such as whitelisting corporate emails.
Integrations
Not confirmed yet.
Platforms & data export
Not confirmed yet.
THE COST FOR YOUR TEAM
Go beyond the starting price.
Published plan prices for your team size and usage. Results update as you type. Taxes, currency conversion and unlisted add-ons are excluded, and anything the source did not state is called out rather than guessed.
Cheapest fit for 1 person, all 1 tools
$0.00/month
$0.00 a year on these plans.
| Tool / plan | Monthly | Per year | What this assumes |
|---|---|---|---|
FreeCheapest fit Flat subscription | $0.00 | $0.00 | Automatically extracted from the linked pricing source. Seat allowances, usage limits, taxes and terms are not confirmed — check them with the provider. |
Pro Flat subscription | $9.00 | $108.00 | Automatically extracted from the linked pricing source. Seat allowances, usage limits, taxes and terms are not confirmed — check them with the provider. |
Business Flat subscription | $29.00 | $348.00 | Automatically extracted from the linked pricing source. Seat allowances, usage limits, taxes and terms are not confirmed — check them with the provider. |
Scale Flat subscription | $79.00 | $948.00 | Automatically extracted from the linked pricing source. Seat allowances, usage limits, taxes and terms are not confirmed — check them with the provider. |
A practical workflow
- Install the npm package with npm install @isdisposable/js and call isDisposable(email) to check if an email is disposable.
- Use the real-time API for advanced detection including DNS/MX checks, risk scoring, and domain age detection.
Based on the sources below. Editorial review does not imply hands-on product testing.
Alternatives to explore
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