Privacy Notice
Last updated: 31 October 2026
This notice explains what personal data Hydromancer collects when you visit our website or use our services, why we use it, who we share it with, and the rights you have under the EU General Data Protection Regulation (GDPR).
1. Who is responsible for your data
The controller of your personal data is Hydromancer B.V., a private limited company registered in the Netherlands, with its registered office at Posthoornstraat 17, 3011 WD Rotterdam, the Netherlands. For any privacy question or request, contact us at data@hydromancer.xyz.
2. What data we collect
- Account data: your name, email address, and sign-in details when you create an account.
- Billing data: your plan, invoices, billing details, and transaction history. Card details are handled by our payment processor, and we do not store full card numbers.
- Usage data: API keys, requests made to our services, token consumption, IP addresses, and technical logs.
- Website data: pages visited, clicks, device and browser information, approximate location derived from your IP address, and a pseudonymous identifier. When you are signed in, this can be linked to your account.
- Communications: the content of messages you send us by email, Telegram, Slack, Discord, or other channels.
The blockchain data we provide through our services is public network data. Where it includes wallet addresses, we process it as part of providing the services.
3. Why we use it and our legal basis
| Purpose | Legal basis |
|---|---|
| Creating and running your account, providing the API and data services | Performance of a contract |
| Billing, invoicing, and keeping financial records | Performance of a contract; legal obligation |
| Securing the services, preventing abuse, and enforcing usage limits | Legitimate interests |
| Responding to support requests and other messages | Performance of a contract; legitimate interests |
| Understanding how the website and services are used, to improve them | Legitimate interests, or consent where the law requires it |
| Measuring the effectiveness of our advertising | Consent |
| Complying with legal and regulatory requirements | Legal obligation |
Where we rely on legitimate interests, our interest is to run, secure, and improve a reliable service. You can object to this processing at any time (see section 8).
5. Who we share data with
We share personal data only with service providers that help us run Hydromancer, under agreements that require them to protect it and use it only on our instructions:
- Vercel — Website and API hosting
- Clerk — Account sign-up, sign-in, and authentication
- Our payment processor — Processing subscription payments
- PostHog — Product and website analytics
- Google (Google Tag Manager) — Managing website tags
- X Corp. — Advertising conversion measurement
We may also disclose data where required by law, to protect our rights, or as part of a merger, acquisition, or sale of assets. We do not sell your personal data.
6. International transfers
Some of our providers process data outside the European Economic Area, including in the United States. Where they do, we rely on safeguards recognised under the GDPR, such as the EU–US Data Privacy Framework or the European Commission's Standard Contractual Clauses.
7. How long we keep data
- Account and usage data: for as long as your account is active, and for a limited period afterwards to handle questions, disputes, or abuse.
- Billing and invoicing records: for 7 years, as required by Dutch tax law.
- Technical logs and analytics data: only as long as needed for security, troubleshooting, and analysis.
- Communications: for as long as needed to handle your request and our relationship with you.
8. Your rights
Under the GDPR, you have the right to:
- access the personal data we hold about you;
- have inaccurate data corrected;
- have your data erased in certain circumstances;
- restrict or object to certain processing, including processing based on legitimate interests;
- receive your data in a portable format;
- withdraw consent at any time, without affecting processing that happened before.
To exercise any of these rights, email data@hydromancer.xyz. We respond within one month. You also have the right to lodge a complaint with a data protection authority — in the Netherlands, the Autoriteit Persoonsgegevens — or with the authority where you live or work.
9. Security
We use appropriate technical and organisational measures to protect personal data, including encryption in transit and access controls. No system is completely secure, so please keep your credentials and API keys safe.
10. Children
Our services are intended for businesses and adults, and are not directed at children under 16. We do not knowingly collect their personal data.
11. Changes to this notice
We may update this notice from time to time. The latest version is always available on this page, and we will notify account holders of material changes.