identity.tw is a developer tool site built around βinclusive identity verification.β Its goal is to ensure that every Taiwan resident can access online services and platforms equally. It focuses on validation of Taiwan resident identification numbers, offering a free online validation API, validation code for major programming languages, and a transparency report tracking how online service providers support legacy and new UI numbers for foreign residents.
The API design is very lightweight. A sample request is https://v.identity.tw?id=G112233445, and the response returns the id plus a valid boolean value, making it suitable for pre-submit form validation or backend data-entry checks. In terms of language support, the site provides local validation implementations for JavaScript, Python, PHP, and Java, while Go is marked as Coming soon. The code includes regular expressions and checksum logic for UI numbers, and also considers scenarios such as Legacy ARC, reflecting its focus on compatibility with foreign resident identification numbers.
The website clearly states that the ID number validation API is provided free of charge. No paid plans, call limits, SLA, or commercial support information is visible. Integration comes in two forms: calling the HTTP API directly, or embedding the sample code into a local system. For development teams that only need format and checksum validation, this approach is low-cost and quick to integrate. However, if real identity verification, KYC, or government database matching is required, the site text does not indicate that it offers those capabilities.
The strengths are clear positioning, a simple interface, free availability, and multilingual examples. It can help product teams avoid incorrectly rejecting non-citizen or foreign resident users. The transparency report covers government, finance, transportation, retail, entertainment, and other services, giving it some value as a public accountability resource. The drawbacks are also apparent: it does not disclose open-source status, self-hosting options, rate-limiting policies, a privacy policy, error codes, versioning, or availability commitments. The documentation is suitable for quick testing, but still falls short of production-grade API documentation.
It is suitable for Taiwan-based services, Taiwan user registration flows in cross-border products, lightweight data validation scenarios outside government or finance, and teams auditing whether their own systems support both legacy and new UI numbers for foreign residents. The text does not provide information on access from mainland China, and payment information cannot be assessed either; since the service is free, payment is not a major concern. Alternatives include implementing Taiwan UI number regex and checksum logic in-house, or choosing a formal KYC/identity verification provider when strong identity checks are required.
β This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on identity.tw official site.
identity.tw is an Taiwan Dev Tools provider. TG4G tracks its product information, an overall rating of 7.0/10, and a China-accessibility score of China direct-connect friendly. Click "Visit Official Site" to reach identity.tw directly.