Terms of Service

Last updated: April 13, 2026

1. Acceptance of Terms

By accessing or using EmailProbe (emailprobe.dev), including our API at api.emailprobe.dev, you agree to be bound by these Terms of Service. If you do not agree to these terms, you may not use the service.

These terms constitute a legally binding agreement between you and EmailProbe. By creating an account, generating an API key, or making API requests, you acknowledge that you have read, understood, and agree to these terms.

2. Description of Service

EmailProbe is an email validation and disposable email detection API. The service provides real-time analysis of email addresses to detect disposable, temporary, and fraudulent email domains through multi-layered intelligence including domain blocklist lookups, MX record analysis, IP clustering, and pattern detection.

EmailProbe offers the following plans:

• Free Tier: 2,500 validations per month at no cost
• Starter: $19/month
• Growth: $49/month
• Scale: $149/month

Plan features, limits, and pricing are subject to change. Current details are available at emailprobe.dev/pricing.

3. Account Registration

To use EmailProbe, you must create an account. You agree to:

• Provide a valid, working email address during registration
• Be at least 18 years of age
• Maintain the security of your account credentials and API keys
• Notify us immediately of any unauthorized access to your account
• Accept responsibility for all activity that occurs under your account

You are solely responsible for safeguarding your API keys. EmailProbe stores API keys as SHA-256 hashes and cannot recover lost keys. If you believe your key has been compromised, revoke it immediately and generate a new one.

4. API Usage

Rate Limits

Each plan has defined rate limits to ensure fair usage and service reliability:

Exceeding your rate limit will result in 429 Too Many Requests responses. Persistent abuse may lead to temporary or permanent suspension.

Prohibited Uses

You agree not to:

• Scrape, reverse-engineer, or attempt to reconstruct EmailProbe's disposable domain blocklist, MX intelligence, or IP cluster data
• Use the API to facilitate the sending of spam, phishing, or unsolicited bulk email
• Use the API to enable or support fraud, identity theft, or other illegal activity
• Share, resell, or redistribute your API keys to third parties
• Attempt to circumvent rate limits, authentication, or any security measures
• Use automated tools to create multiple free-tier accounts to bypass plan limits

5. Data Usage & Crowdsourced Intelligence

When you submit email addresses via the EmailProbe API, the following occurs:

• Email addresses are analyzed in real time for validation and pattern detection
• Raw email addresses are never stored. Only SHA-256 hashes are retained for 30 days to prevent duplicate processing and abuse detection
• Domain-level aggregate data (e.g., total lookups, unique customer count, random local-part ratio) is extracted and stored permanently
• Structural analysis of email naming conventions (e.g., "word.word" or "wordNNN") is performed at the domain level

This aggregated, anonymized data is used to improve detection accuracy for all EmailProbe customers. This is our crowdsourced intelligence model -- the more data flows through the system, the better it becomes at identifying disposable and suspicious domains.

If you wish to opt out of contributing to crowdsourced intelligence, contact us at support@emailprobe.dev. Note that opting out does not affect the service you receive; it only prevents your query patterns from improving detection for others.

6. Intellectual Property

All intellectual property associated with EmailProbe is owned by EmailProbe, including but not limited to:

• The disposable domain database and blocklist
• MX record intelligence and mail server pattern data
• IP clustering data and infrastructure fingerprints
• Detection algorithms, scoring models, and pattern analysis systems
• The EmailProbe name, logo, and branding
• API design, documentation, and SDKs

You are granted a limited, non-exclusive, non-transferable license to use the API in accordance with your plan and these terms. This license does not grant you ownership of any data, algorithms, or intelligence produced by the service.

7. Payment Terms

Paid subscriptions are billed monthly through our third-party payment processor, Dodo Payments. By subscribing to a paid plan, you agree to the following:

• Your subscription will automatically renew each billing cycle unless cancelled
• You may cancel your subscription at any time from your account dashboard
• Cancellation takes effect at the end of the current billing period
• No refunds are issued for partial months. You retain access to paid features until the end of your current billing cycle
• If payment fails, your account may be downgraded to the free tier after a grace period
• Prices may change with 30 days' notice to registered users

8. Free Tier

EmailProbe offers a free tier of 2,500 email validations per month. The free tier:

• Does not require a credit card to activate
• Resets on the first day of each calendar month
• Includes full API access with a rate limit of 10 requests/second
• Is subject to the same Terms of Service as paid plans

We reserve the right to modify free tier limits, features, or availability at any time. If changes materially affect your usage, we will provide reasonable notice.

9. Limitation of Liability

EmailProbe is provided "as is" and "as available" without warranties of any kind, whether express or implied, including but not limited to implied warranties of merchantability, fitness for a particular purpose, and non-infringement.

We do not guarantee:

• 100% accuracy in identifying disposable or fraudulent email addresses
• That the service will be uninterrupted, error-free, or free of vulnerabilities
• That false positives (legitimate emails flagged as disposable) or false negatives (disposable emails not detected) will not occur

To the maximum extent permitted by law, EmailProbe's total liability to you for any claims arising from or related to the service shall not exceed the total fees you have paid to EmailProbe in the 12 months preceding the claim.

In no event shall EmailProbe be liable for any indirect, incidental, special, consequential, or punitive damages, including lost profits, data loss, or business interruption.

10. Termination

We may suspend or terminate your account, without prior notice, if we reasonably believe:

• You have violated these Terms of Service
• Your usage poses a risk to the service, other users, or our infrastructure
• Your account is being used for illegal purposes

You may delete your account at any time through your account settings or by contacting support@emailprobe.dev. Upon deletion:

• Your API keys are immediately revoked
• Your account data is permanently deleted within 30 days
• Domain-level aggregate data (which contains no personal information) is retained

11. Changes to Terms

We may update these Terms of Service from time to time. When we do:

• The "Last updated" date at the top of this page will be revised
• For material changes, we will notify registered users via email
• Continued use of EmailProbe after changes constitutes acceptance of the updated terms

If you do not agree with updated terms, you should discontinue use of the service and delete your account.

12. Contact

If you have questions about these Terms of Service, contact us at:

support@emailprobe.dev