Terms of Service

These Terms of Service (“Terms”) are a binding agreement between you and Marketlens governing your use of the Marketlens website, APIs, data exports, documentation, and all related services (the “Services”).

By creating an account, accessing the Services, or using an API key you agree to these Terms and our Privacy Policy. If you are acting on behalf of an organization, you represent that you have authority to bind that organization.

Marketlens is operated by Paweł Fijałkowski, an individual based in Poland. Contact: [email protected].

As Marketlens is not currently operated through a registered business entity, references to “Marketlens,” “we,” “us,” or “our” throughout these Terms refer to the operator personally.

Account

A registered user account providing access to the Services.

API

The Marketlens REST endpoints, WebSocket connections, SDKs, and related programmatic interfaces.

API Key

The authentication credential issued to you for accessing the API.

Data

All market data made available through the Services, including order book snapshots, deltas, trades, candles, and signals.

Derived Data

New data you create from the Data that cannot be reverse-engineered to reconstruct the originals.

Subscription Tier

The service level (Free, Pro, or Enterprise) associated with your Account, each with specific rate limits, daily caps, and feature access.

Third-Party Data

Market data originating from third-party platforms—including Polymarket—that is collected, normalized, and served through the Services.

You must be at least 18 years old and legally capable of entering into a binding agreement. You must not reside in any country subject to applicable trade sanctions or embargoes, and must not appear on any restricted or denied party list.

You must provide accurate information during registration and keep it current. We may suspend accounts created with false or misleading information.

You are responsible for maintaining the confidentiality of your credentials and API Keys, and for all activity under your Account. API Keys must not be shared, committed to public repositories, or embedded in client-side code. Notify us immediately at [email protected] if you suspect unauthorized access.

Subject to these Terms and payment of applicable fees, Marketlens grants you a limited, non-exclusive, non-transferable, non-sublicensable, revocable license to access and use the Services and Data in accordance with your Subscription Tier.

Free Tier

You may use the Data for personal, non-commercial, and research purposes only. You may not create Derived Data for commercial purposes, redistribute the Data, or use it to build commercial products.

Paid Tiers

Pro and Enterprise subscribers may access, process, and store Data for internal business purposes; create Derived Data; display Data in their own applications and reports; and use Data for backtesting, quantitative research, and model development.

Redistribution

Without a separate written agreement you may not redistribute, resell, sublicense, or syndicate the raw Data to third parties—whether free or paid. This includes operating a competing data service or systematically exposing Data through your own API.

Attribution

Where you publicly display Data or Derived Data you must include reasonable attribution such as “Data provided by Marketlens.”

You agree not to:

• Use the Services for any unlawful purpose, including violations of securities, commodities, or gambling regulations.
• Reverse engineer, decompile, or disassemble any part of the Services.
• Circumvent or interfere with rate limits, authentication, or other technical restrictions.
• Use automated tools to exceed API rate limits or create excessive load.
• Access the Services to build a competing product or for competitive benchmarking.
• Share, transfer, or sell Account credentials or API Keys.
• Redistribute or syndicate the Data except as permitted under Section 6.
• Create derivative financial products based on the Data without prior written consent.
• Engage in market manipulation, fraud, or violations of any exchange or venue rules.
• Transmit malware or interfere with other users’ access.
• Remove or alter any proprietary notices, trademarks, or attribution.
• Impersonate any person or entity or misrepresent your affiliation.

The Data originates from third-party platforms including Polymarket. Marketlens collects, normalizes, and stores this data but does not control its accuracy, completeness, or availability at the source.

Marketlens is not affiliated with, endorsed by, or sponsored by Polymarket or any other data source. Third-Party Data is provided “as is.” Changes to upstream platforms may affect coverage or availability without notice.

You are solely responsible for ensuring your use of the Data complies with applicable third-party terms and regulations.

Paid tiers require payment as described on our pricing page. All fees are in USD and exclude applicable taxes.

Subscriptions renew automatically for successive periods of the same duration unless cancelled before the renewal date. We may adjust pricing with at least 30 days’ advance notice. You are responsible for all applicable taxes.

If payment fails we will notify you and provide at least 14 days to resolve the issue. After that we may downgrade your Account, suspend access, or terminate the Account. You remain liable for fees incurred through termination.

Cancellation and Refunds

You may cancel a paid subscription at any time. Cancellation takes effect at the end of the current billing period and you retain access until then. Fees already paid are generally non-refundable.

Right of Withdrawal (EU)

If you are a consumer in the European Union or European Economic Area, you have a statutory right to withdraw from a distance purchase within 14 days of subscribing, without giving a reason. By subscribing and requesting immediate access to the Services, you expressly consent to the performance of the Services beginning before the withdrawal period expires and acknowledge that you will lose your right of withdrawal once the Services have been fully performed. If you withdraw before the end of the 14-day period and the Services have already begun at your request, you may be charged a proportional amount for the Services used.

The Services—including software, APIs, documentation, trademarks, and the compilation of Data—are the property of Marketlens or its licensors. These Terms grant no ownership interest in the Services.

You retain ownership of Derived Data you create in compliance with these Terms. If you provide feedback or suggestions about the Services, you grant Marketlens a perpetual, irrevocable, worldwide, royalty-free license to use that feedback for any purpose.

We may collect and use aggregated, anonymized usage data for improving the Services and monitoring performance.

The Services and Data are provided “as is” and “as available” without warranties of any kind, whether express, implied, or statutory, including implied warranties of merchantability, fitness for a particular purpose, accuracy, completeness, or uninterrupted access.

Marketlens does not warrant that the Services will be uninterrupted, error-free, or free from harmful components. Data may contain gaps, delays, or omissions resulting from WebSocket disconnections, third-party outages, or other technical factors. No service level agreement applies unless separately agreed in writing.

Marketlens reserves the right to modify, suspend, or discontinue any Data, features, endpoints, or portions of the Services at any time, with or without notice.

Not Financial Advice

The Services are for informational and research purposes only. Nothing constitutes investment, financial, trading, legal, or tax advice. Marketlens is not a registered investment advisor, broker-dealer, or licensed financial professional.

Prediction markets involve speculative risk. Historical order book data does not predict future outcomes. You are solely responsible for evaluating the risks of any decision you make using the Services.

No Affiliation

Marketlens is independent and is not affiliated with, endorsed by, or sponsored by Polymarket or any other prediction market platform.

To the maximum extent permitted by applicable law, Marketlens shall not be liable for any indirect, incidental, special, consequential, or punitive damages—including lost profits, lost revenue, loss of data, or business interruption—arising from your use of or inability to use the Services, regardless of the theory of liability.

To the maximum extent permitted by applicable law, the total aggregate liability of Marketlens for all claims arising out of these Terms or the Services shall not exceed the greater of (a) the amount you paid Marketlens in the twelve months preceding the claim, or (b) one hundred United States dollars ($100).

These limitations apply to the fullest extent permitted by law. Nothing in these Terms excludes or limits liability for death or personal injury caused by negligence, for fraud or fraudulent misrepresentation, or for any other liability that cannot be excluded or limited under applicable law.

Marketlens bears no responsibility for investment gains or losses, trading outcomes, or financial decisions made using the Data.

To the extent permitted by applicable law, you agree to defend, indemnify, and hold harmless Marketlens from claims, damages, liabilities, and reasonable expenses (including attorneys’ fees) arising from your breach of these Terms, violation of law, or infringement of third-party rights.

This section does not apply to the extent that it would be considered an unfair contract term under the consumer protection laws of your jurisdiction.

These Terms take effect when you first access the Services and remain in effect until terminated. You may terminate your Account at any time via Account settings or by contacting [email protected]. Cancellation of a paid subscription takes effect at the end of the billing period.

We may terminate or suspend your Account with 30 days’ notice for any reason, or immediately for material breach, non-payment, suspected fraud, or conduct threatening the Services.

On termination all licenses cease. You must stop using the Services and, if requested, delete all Data within 30 days and confirm deletion in writing. Outstanding fees remain due.

Sections covering redistribution, usage restrictions, intellectual property, disclaimers, liability, indemnification, governing law, and general provisions survive termination.

These Terms are governed by the laws of Poland. If you are a consumer in the EU/EEA, you also retain the protection of the mandatory provisions of the consumer law of your country of residence.

Disputes shall first be submitted to good-faith negotiation for 30 days. If unresolved, disputes may be brought before the competent courts in Poland. If you are an EU consumer, you may also bring proceedings in the courts of your country of residence.

You may also use the European Commission’s Online Dispute Resolution platform at ec.europa.eu/consumers/odr.

Either party may seek injunctive relief in any court of competent jurisdiction to protect intellectual property or confidentiality.

Your use of the Services is subject to our Privacy Policy, which describes how we collect, use, and disclose your personal data in accordance with the General Data Protection Regulation (GDPR) and applicable Polish data protection law.

Nothing in these Terms is intended to limit or exclude any rights you may have under mandatory consumer protection laws of your jurisdiction. Where any provision of these Terms conflicts with mandatory consumer rights, the mandatory rights prevail.

We may modify these Terms at any time. Material changes come with at least 30 days’ notice; non-material changes take effect on posting. Continued use constitutes acceptance.

We may modify, update, or discontinue parts of the Services at any time. We will make reasonable efforts to notify you of material changes.

These Terms and the Privacy Policy constitute the entire agreement. You may not assign your rights without written consent; Marketlens may assign freely. If any provision is unenforceable it will be modified minimally; the rest continues in force.

Failure to enforce a provision is not a waiver. Marketlens is not liable for delays caused by events beyond reasonable control—including outages, cyberattacks, and third-party platform failures. Nothing in these Terms creates a partnership, joint venture, or employment relationship.

Notices may be sent to the email on your Account. You may send notices to [email protected].

Questions about these Terms? [email protected]