QuantOracle

Terms of Service

The short version: use it freely, don't abuse the free API, and remember the calculator outputs are math — not financial advice. Full terms below.

Last updated: May 14, 2026

1. Acceptance of terms

By using quantoracle.dev (the "Site") or api.quantoracle.dev (the "API"), you agree to these terms. If you don't agree, don't use the Site or API.

2. What QuantOracle provides

QuantOracle is a free toolkit that provides:

  • 15 interactive quant finance calculators on the Site, free for human use
  • An HTTP API with 63 calculator endpoints + 10 paid composite endpoints
  • Free tier: 1,000 calls per IP per day, no signup or API key required
  • Paid tier: per-call USDC payments via x402 on Base or Solana for usage beyond the free tier or for paid composite endpoints
  • Open-source integrations (LangChain, Coinbase AgentKit, MCP server)
  • Editorial content (comparison articles, tutorials, technical documentation)

3. THE BIG DISCLAIMER — Not financial advice

This is the most important section. Read it.

QuantOracle outputs are mathematical computations. They are correct within the assumptions of the underlying models (Black-Scholes, Kelly Criterion, Monte Carlo, etc.) and verified against 120 published-textbook benchmarks. They are not financial advice.

Specifically:

  • Calculator outputs depend on your inputs. Garbage in, garbage out. If your volatility estimate is wrong, your Black-Scholes price will be wrong. The calculator has no way to know that.
  • Model assumptions can be wrong for your situation. Black-Scholes assumes log-normal returns. Real markets have fat tails. Kelly assumes you know your true edge. You usually don't. The calculator returns the formula-correct answer; it can't tell you whether the formula applies.
  • Past performance doesn't predict future returns. Backtests and Monte Carlo projections are scenarios, not forecasts.
  • You are responsible for any decisions you make using these tools. The operator of QuantOracle is not your financial advisor, broker, or fiduciary.

If you are trading real money based on QuantOracle outputs, you should consult a licensed financial advisor, understand the underlying math yourself, and accept that you alone bear the risk of your trades.

4. No warranty

QuantOracle is provided "as is" with no warranty of any kind, express or implied. We don't warrant that:

  • The Site or API will be available at any specific time (no uptime SLA on the free tier)
  • Calculations will be appropriate for your specific use case
  • The Site or API will be free of bugs or errors
  • Any specific financial outcome will result from using the tools

We test the math against textbook values (the accuracy_benchmarks.py suite has 120 verified tests). If you find a bug, file an issue and we'll fix it. But there's no guarantee.

5. Limitation of liability

To the maximum extent permitted by law, the operator of QuantOracle is not liable for any damages arising from use of the Site or API, including:

  • Trading losses, missed opportunities, or any other financial losses
  • Data loss
  • Service interruptions
  • Consequential, incidental, or punitive damages

If a court finds this limitation unenforceable, the operator's total aggregate liability is limited to the amount you paid to QuantOracle in the 12 months preceding the claim. For free-tier users, that's zero. For x402 paid users, that's the sum of the USDC settlements your wallet sent us.

6. Acceptable use

The following are prohibited:

  • Abuse of the free tier. Don't try to evade the 1,000/IP/day limit via rotating IPs, proxies, or distributed scrapers. We will rate-limit or IP-block abusers.
  • Resale of free-tier output as a paid service. If you want to build a paid product on top of QuantOracle, use the paid tier — it's priced at $0.002-$0.10/call specifically so you can resell at a markup.
  • Denial of service. No coordinated traffic attacks, no oversized requests intended to consume server resources.
  • Misrepresentation. Don't claim QuantOracle endorses any specific trading strategy, fund, or product. We don't.
  • Reverse engineering / cloning the math + reselling without attribution. The API outputs themselves aren't copyrighted (mathematical formulas can't be), but copying the entire API surface to compete on price is bad form. We'd prefer you contribute upstream.

Violations may result in IP blocks, rate-limit reduction, or being added to a public list of bad actors. Severe abuse may result in legal action.

7. x402 paid endpoints

Paid composite endpoints settle via the x402 protocol. Specific terms:

  • Pricing is per-call and on-chain. You see the price quote before signing.
  • Settlement is final once on-chain confirmation occurs. No refunds for changing your mind after settlement.
  • If the API errors before returning data, settlement does not occur (this is enforced at the protocol level, not our discretion).
  • The x402 protocol and the Coinbase CDP facilitator are third parties. QuantOracle is not responsible for blockchain issues (e.g., chain forks, facilitator downtime).

Detailed pricing is at /pricing.

8. Intellectual property

The source code of QuantOracle is open source (MIT license) and available at github.com/QuantOracledev/quantoracle. The mathematical formulas implemented are not copyrightable; the specific implementation and documentation are licensed under MIT terms.

The QuantOracle name and logo are not licensed for commercial use without permission. If you fork the code, please don't market your fork as "QuantOracle."

9. Affiliate links

Some links on the Site are affiliate links — when you click them and complete a purchase on the destination site, QuantOracle may earn a commission. These are always clearly marked with a Sponsored badge and use the rel="sponsored nofollow noopener" HTML attributes. Full details at /affiliate-disclosure.

10. Privacy

Data we collect and how we use it is described at /privacy. The short version: we collect very little, we don't sell what we do collect, and there's no signup.

11. Changes to these terms

We may update these terms at any time. Material changes are announced via the QuantOracle RSS feed. The change history is visible in git. Continued use after material changes constitutes acceptance.

12. Governing law

These terms are governed by the laws of the operator's primary jurisdiction. Any disputes will be resolved in the courts of that jurisdiction. If you're a consumer in a jurisdiction with mandatory consumer-protection law, those laws apply to the extent they cannot be waived by contract.

13. Contact

Questions about these terms: GitHub Issues. See the contact page for current channels.