Cookie Policy
Last updated: March 23, 2026
1. What Are Cookies
Cookies are small text files that are stored on your device when you visit a website. They are widely used to make websites work, improve efficiency, and provide information to website owners.
2. Cookies We Use
2.1 Essential Cookies (Always Active)
These cookies are necessary for the platform to function and cannot be switched off.
| Cookie | Provider | Purpose | Retention |
|---|---|---|---|
| sb-*-auth-token | Supabase | Authentication session | Session |
| theme | Archimedes | Dark/light mode preference | Persistent |
| cookie-consent | Archimedes | Cookie consent preferences | 1 year |
2.2 Analytics (Cookieless — you can switch it off)
We measure aggregate page views and page performance using Vercel Web Analytics and Vercel Speed Insights. These are cookieless: they set no cookies, store nothing on your device, and do not build a profile of you or follow you across other sites. We rely on legitimate interest to run them, and you have an absolute right to object — choose "Turn off analytics" in the cookie banner and they will not load at all.
We run no advertising, marketing or cross-site tracking of any kind.
Sentry is used for error and performance monitoring so we can diagnose faults.
| Cookie | Provider | Purpose | Retention |
|---|---|---|---|
| sentry-* | Sentry | Error tracking and performance monitoring | Session |
2.3 Third-Party Cookies
These cookies are set by third-party services we use.
| Cookie | Provider | Purpose | Retention |
|---|---|---|---|
| __stripe_mid, __stripe_sid | Stripe | Payment fraud prevention | 1 year / 30 min |
3. How to Manage Cookies
You can manage cookies through:
- Browser settings: Most browsers allow you to block or delete cookies. See your browser's help documentation for instructions.
- Our cookie banner: On your first visit you can turn analytics off. Your choice is stored on your device and is honoured immediately — the analytics scripts are not loaded at all for visitors who opt out. To change your mind, clear the
cookie-consententry in your browser's local storage and the banner will reappear.
Note: Blocking essential cookies may prevent the platform from functioning properly. You will still be able to browse public content, but authentication and transaction features require essential cookies.
4. Changes to This Policy
We may update this Cookie Policy from time to time. Changes will be posted on this page with an updated "Last updated" date.
5. Contact Us
For questions about our cookie practices, contact us at privacy@archimedes.market.
Archimedes Market — Cookie Policy