2FA Directory is a community-driven database and API that catalogs websites and online services supporting two-factor authentication across multiple methods including SMS, email, phone calls, hardware tokens, and software authenticators.
The project addresses the challenge of discovering which services offer two-factor authentication and what methods they support. It maintains a comprehensive, crowdsourced list accessible both through a web directory and a public API, allowing users to evaluate services based on their security offerings and helping consumers make informed choices between alternatives.
The tool suits anyone building security-conscious applications, conducting security audits, or researching service capabilities. It works well for developers integrating 2FA support into their own platforms and for security researchers tracking adoption trends. The project explicitly recommends using the API rather than scraping the repository directly, as the data structure may change. Commercial use of the data is permitted under the project's license but requires proper attribution and sponsorship is requested to offset maintenance costs.
The project maintains active community engagement through multiple social media channels and actively solicits contributions via documented guidelines. Development activity centers on expanding the directory's coverage through community submissions and maintaining the underlying data structure to support both the web interface and API access.
