Last updated: 2026-05-21. This document has not been reviewed by counsel; it is published in good faith and may be revised. Material changes will be notified per §13.

Terms of Service

Preamble

These Terms of Service ("Terms") govern your use of Volar and the services available at volardata.com ("Service"), operated by Volar ("we," "us," or "our"). By creating an account, you agree to be bound by these Terms. If you do not agree, do not use the Service.

1. Definitions

2. Account

Eligibility

You must be at least 18 years old to create an account. By registering, you represent that you are not located in a country subject to a US or EU embargo or designated on any OFAC sanctions list, and that you are not otherwise prohibited from using the Service under applicable law.

One Account Per Person or Company

Creating duplicate accounts to circumvent rate limits, cadence gates, or download caps is prohibited and grounds for immediate termination without refund.

Account Security

You are responsible for maintaining the confidentiality of your password and API keys. You are responsible for all activity that occurs under your account. Notify us immediately at [email protected] if you suspect unauthorised access.

3. Subscriptions and Billing

Self-Serve Billing

Subscriptions are managed self-serve via Stripe. By providing payment details, you authorise Stripe to charge your payment method on a recurring basis according to your selected Tier and Billing Cadence.

Tiers and Pricing

Billing-Cadence-Gated History

The Pro tier's historical data depth is determined by the Billing Cadence:

Switching from Monthly to Annual unlocks the archive on next subscription renewal. Switching from Annual to Monthly removes archive access at the end of the current billing period.

Cancellation

You may cancel your Subscription at any time through the Stripe Customer Portal. Cancellation takes effect at the end of the current billing period. You retain access until the period ends. After cancellation, you retain rights to Data already downloaded for internal use only — public redistribution remains prohibited indefinitely.

Refunds

Payments are non-refundable except where required by applicable law (e.g., EU consumer rights for digital services purchased in error within 14 days of initial purchase). Partial-month refunds are not provided. Pro Annual subscribers who download a substantive portion of the historical archive within the first 14 days waive their EU statutory withdrawal right by exercising the Service.

Price Changes

We will provide at least 30 days' written notice (via email to your registered address) before changing Subscription prices. Continued use after the notice period constitutes acceptance of the new pricing. Existing subscribers are not affected mid-cycle.

4. Usage Limits and Anti-Abuse

Rate Limits

Each Tier has defined API rate limits and download caps. Exceeding limits results in temporary throttling (HTTP 429). Current limits per Tier:

Tier Requests / min Daily file downloads Concurrent connections
Sandbox 10 0 (blocked) 1
Pro Monthly 1,000 5 10
Pro Annual 1,000 50 10
Enterprise 5,000 unlimited (monitored) 50

Anti-Abuse

You may not use the Service to:

Watermarking

All Parquet files served via the Service contain embedded per-key watermarks identifying the Subscriber and timestamp of each download. Embedded watermarks are conclusive evidence of the source of any redistributed Data, and Volar may rely on them in enforcement actions without further authentication.

Mass Extraction

Sustained download patterns that exceed reasonable internal-research use (for example, downloading the entire BTC archive in under 60 days on a single Pro Annual subscription) trigger automatic monitoring alerts and may be flagged for review. We reserve the right to throttle, suspend, or terminate accounts exhibiting extraction patterns inconsistent with the licensed use.

5. Data Rights and License

License Grant

Subject to these Terms and payment of applicable fees, Volar grants you a non-exclusive, non-transferable, revocable license to use the Data for the rights specified for your Tier:

Right Sandbox Pro Enterprise
Research / personal use ✓ (eval only, 30 days) ✓ ✓
Production trading on your own systems ✗ ✓ ✓
Academic publication (with citation) ✗ ✓ ✓
Internal redistribution within company ✗ ✓ (≤5 users) ✓ (unlimited)
Derivative data products ✗ ✗ ✓ (with written addendum)
Public redistribution / resale ✗ ✗ ✗ (prohibited at all Tiers)

Restrictions

You may not, regardless of Tier:

Cancel-Then-Retain (Pro Annual)

Pro Annual subscribers who download archival Data and subsequently cancel before renewal retain the right to use the downloaded Data for internal purposes only. Public redistribution, resale, and derivative-data products remain prohibited indefinitely after cancellation. This clause exists because the marquee BTC historical archive is the company's primary commercial asset; the price reflects internal-use licensing, not perpetual redistribution.

Customer Analytics

You retain all rights to derived analytics, models, signals, and research you create using the Data, subject to the license restrictions above. Volar claims no ownership over your derivative work product.

6. Deribit Data Disclaimer

Data is sourced from Deribit's publicly accessible API. Volar is an independent service and is not affiliated with, endorsed by, or in any way officially connected with Deribit. We do not guarantee the completeness, accuracy, timeliness, or fitness of the Data for any purpose. You are solely responsible for verifying Data before making financial, investment, or trading decisions. Nothing in the Service constitutes investment advice.

7. Uptime and SLA

We target the following uptime levels per calendar month:

Downtime caused by third-party providers (Deribit, Cloudflare, Hetzner, Stripe), scheduled maintenance (announced 48h in advance), or force majeure events is excluded from SLA calculations.

Where Enterprise uptime breaches the SLA by more than 0.1% in a calendar month, affected users may request a pro-rata service credit by emailing [email protected] within 15 days of the end of that month. Pro users may report sustained outages but do not receive automatic credits — contact support if downtime materially affected your use.

8. Acceptable Use

You agree not to use the Service to:

Security researchers who discover vulnerabilities are encouraged to disclose them responsibly to [email protected] before public disclosure.

9. Termination

By You

You may close your account at any time from the dashboard or by emailing [email protected].

By Volar

We may suspend or terminate your account immediately upon: non-payment of fees, material breach of these Terms (including the anti-abuse and watermarking clauses), sanctions or OFAC violation, mass-extraction patterns under §4, or behaviour that causes harm to other users or the Service. No refund is provided for terminations resulting from breach.

Data Deletion

Upon termination, your account data is retained for a 30-day grace period (during which you may request an export), after which it is permanently deleted. See our Privacy Policy for details. Watermarked Data already downloaded remains traceable indefinitely under §4.

10. Limitation of Liability

The Service is provided "as is" without warranties of any kind, express or implied, including fitness for a particular purpose or non-infringement.

To the maximum extent permitted by applicable law: (a) Volar's total aggregate liability arising out of or related to your use of the Service is capped at the total fees you paid in the 12 months preceding the claim; (b) Volar is not liable for indirect, incidental, consequential, special, or punitive damages, including lost profits, data loss, or business interruption, even if advised of the possibility of such damages.

Nothing in these Terms excludes liability for death or personal injury caused by negligence, fraud, or any other liability that cannot be limited by law.

11. Indemnification

Each party agrees to indemnify and hold harmless the other party and its officers, directors, and employees from and against any claims, damages, losses, and costs (including reasonable legal fees) arising out of: (a) your breach of these Terms; (b) your use of the Service in violation of applicable law; or (c) any claim by a third party relating to your derived analytics or downstream use of the Data.

12. Governing Law

These Terms are governed by and construed in accordance with the laws of Romania. Any disputes arising under these Terms shall be resolved in the courts of Bucharest, Romania, and both parties submit to the exclusive jurisdiction of those courts. Nothing in this section limits a consumer's right under their local jurisdiction to bring proceedings in their country of habitual residence where applicable consumer-protection law so provides.

13. Changes to These Terms

We may update these Terms at any time. We will provide at least 30 days' notice via email before changes take effect. Continued use of the Service after the effective date constitutes acceptance of the updated Terms.

14. Contact