Cookie Policy
Effective Date
January 27, 2026
1. Introduction
This Cookie Policy explains how Sylinko Inc. ("we," "us," and "our") uses cookies and similar technologies (such as local storage and web beacons) when you visit our websites, including our Documentation Site and Sylinko Passport (collectively, the "Websites").
This policy provides you with clear information about the cookies we use and your choices regarding these technologies.
2. What are Cookies?
Cookies are small text files that are placed on your device (computer, smartphone, or tablet) when you visit a website. They are widely used to make websites work more efficiently, as well as to provide information to the owners of the site.
We use two main types of cookies:
- Session Cookies: These are temporary cookies that expire when you close your browser.
- Persistent Cookies: These remain on your device for a set period or until you delete them.
We also use "Similar Technologies" such as Local Storage (used to store your theme preferences, like "Dark Mode") which function similarly to cookies but store data in your browser for longer periods.
3. How We Use Cookies
We use cookies for the following purposes:
- Authentication & Security: To identify you when you log in to Sylinko Passport and to protect our services from malicious attacks (e.g., bot attacks).
- Functionality: To remember your preferences, such as your language settings or theme (Light/Dark mode).
- Performance & Analytics: To understand how our Websites are used, detect errors, and improve system stability.
4. Cookies We Use
Below is a detailed list of the cookies and technologies we use on our Websites:
4.1. Strictly Necessary Cookies (Essential)
These cookies are essential for the Websites to function properly. You cannot switch these off in our systems.
| Cookie Name | Provider | Purpose |
|---|---|---|
__Secure-sylinko_passport.session_token | Sylinko Passport | Authentication. Used to maintain your logged-in status and secure your session. |
__Secure-sylinko_passport.state | Sylinko Passport | Authentication. Used to prevent CSRF attacks during the login process. |
better-auth.last_used_login_method | Sylinko Passport | Authentication. Remembers the last login method you used (e.g., email, Google, GitHub) for a smoother login experience. |
cf_clearance / cf_uvid | Cloudflare | Security. Used by Cloudflare Turnstile to verify that you are a human and not a bot. |
4.2. Functional Cookies (Preferences)
These technologies enable the website to provide enhanced functionality and personalization.
| Cookie Name | Type | Purpose |
|---|---|---|
NEXT_LOCALE | Cookie | Localization. Remembers your preferred language (e.g., English or Chinese) so you don't have to verify it every time. |
theme | Local Storage | Appearance. Stores your preference for Light Mode or Dark Mode. |
4.3. Performance & Analytics Cookies
These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site.
| Cookie Name | Provider | Purpose |
|---|---|---|
sentryReplaySession | Sentry | Error Tracking. Helps us identify unique user sessions when an application error occurs, allowing us to fix bugs faster. |
5. Third-Party Services
In addition to our own cookies, we use trusted third-party services that may verify cookies on your device. Specifically:
- Stripe: We use Stripe for payment processing. Stripe sets cookies to detect fraud and facilitate transactions. (See Stripe Privacy Policy)
- Cloudflare: (See Cloudflare Privacy Policy)
- We use Cloudflare Turnstile for security. This service sets cookies to distinguish between humans and bots.
- We also use Cloudflare Web Analytics for anonymous website traffic analysis.
- Sentry: We use Sentry for anonymous error tracking and performance monitoring. (See Sentry Privacy Policy)
6. Managing Your Cookie Preferences
You have the right to decide whether to accept or reject cookies. You can exercise your cookie rights by setting your browser controls.
- Browser Settings: Most web browsers allow you to control cookies through their settings preferences. You can usually find these settings in the "Options" or "Preferences" menu of your browser.
- Consequences of Disabling: Please note that if you disable Strictly Necessary Cookies (like authentication tokens), you may not be able to use certain features of our Websites, such as logging in to Sylinko Passport.
7. Updates to This Policy
We may update this Cookie Policy from time to time in order to reflect, for example, changes to the cookies we use or for other operational, legal, or regulatory reasons. Please revisit this Cookie Policy regularly to stay informed about our use of cookies and related technologies.
8. Contact Us
If you have any questions about our use of cookies or other technologies, please email us at contact@sylinko.com.
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