check-mail.org

What It Is

Check-Mail.org is an email verification API service provided by Sweden-based Techinate Aktiebolag. It is designed for developers who need to assess email quality during user registration, mailing-list cleanup, and anti-spam workflows. Rather than performing only regex-based format checks, it combines MX records, domain information, reputation signals, blacklists/whitelists, and heuristic rules to return JSON results, a risk score, and a recommendation on whether to block the address.

Core Capabilities and Integration

Its core capabilities include validating full email addresses or domains, identifying disposable/temporary emails, checking MX pointers, determining the type of email service, and returning relatively rich fields in sample responses, such as domain_age, mx_host, possible_typo, and is_role_based_email. Integration is straightforward: send an HTTP request and receive JSON in return. The page says it provides sample code for most programming languages, as well as prompts for Claude Code, Cursor, and Copilot, but the main text does not list official SDKs, authentication methods, error codes, or a complete documentation link. For developers, the barrier to entry is low, though serious production integration would still require further review of the API documentation.

Pricing and Commercial Terms

Pricing is clear: the free tier includes 1,000 requests per month with no credit card required; Pro costs $50/month for 200,000 requests; and Ultra costs $99/month for 500,000 requests. All plans include the same core capabilities, including email verification, temporary email detection, and a load-balanced API. The terms also state that paid subscriptions come with a 30-day money-back guarantee and can be upgraded, downgraded, or canceled. Payment methods are not disclosed.

Pros and Cons

The advantages are that the free quota is suitable for trials and small projects, the API returns detailed fields, and its detection dimensions are more practical than simple format validation. It also claims over 99.9% uptime and global load balancing. The drawbacks are that it does not clarify whether it is open source, self-hostable, whether official SDKs are available, what payment methods are supported, or what the full SLA looks like. The terms of service also state that the service is provided “as is” and does not guarantee uninterrupted or error-free operation.

Who It’s For and Access from China

It is suitable for SaaS products, content communities, e-commerce sites, or any development team that needs to reduce fake signups, temporary email usage, and spam accounts. The main text does not provide information about access from mainland China, so it is unclear whether direct connectivity is available; network stability and payment availability need to be tested in practice. If data compliance or local deployment is a strong requirement, you should look into whether domestic alternatives exist or whether there are email verification solutions that support private deployment.