Terms of service
Effective
The agreement
These terms are an agreement between you and Proairos Pte. Ltd., a company registered in Singapore, at 60 Paya Lebar Road, #06-28 Paya Lebar Square, Singapore 409051 (“we”, “us”) for the use of LetoQuant: this website, the API at api.letoquant.com, the MCP endpoint at mcp.letoquant.com, and the data they provide (together, “the service”). By creating an account or using the service, you accept these terms; if you use it for an organisation, you accept them for that organisation too. Our privacy policy explains how we handle personal data.
Who may use the service
You must be at least 18 years old and able to make a binding agreement, and you may not use the service where the law forbids it.
Your account and API keys
You sign in with Apple, Google or an email code; keep them secure, because you answer for what is done through your account. API keys and connected AI clients act as you. A key is personal: its secret is shown once, you answer for its use, and you may not share it. If you think a key has leaked, delete it on your API keys page and tell us.
What the service is
LetoQuant provides research data on US markets, from SEC filings and a licensed market-data vendor, updated nightly, and tools to query it from AI clients and programs. Queries run on computers we operate ourselves, so the service may be unavailable at times, including for maintenance we announce in advance; we do not promise any level of availability. Each plan has quotas, such as a number of queries and an amount of query time per day, and fair use applies within them. We may change, add or remove features, tables and quotas; when a change takes away something you pay for, we tell you in advance.
Use of the data
You may use the data and your query results for your own research and analysis, and show them in your own AI conversations and in your own work. You may not redistribute, resell, sublicense or publish the data or substantial parts of it, export it in bulk, copy it systematically, or use it to build or improve a dataset or service that competes with ours.
Acceptable use
You may not get around a plan’s limits or quotas or the service’s security; share an account or an API key, or let others use yours; attack, overload, scrape or disrupt the service; reverse engineer it, except where the law allows; use it to break the law or anyone’s rights; or present what it provides as advice from us.
Not investment advice
The service provides research data and education, not investment, financial, legal or tax advice: see Not investment advice, which is part of these terms. The data is provided as is. It may contain errors, gaps or delays, and we do not warrant that it is accurate, complete or current. You alone are responsible for the decisions you make with it.
Plans and payment
At launch, the Free plan costs nothing and Pro is offered as early access, free of charge, which we grant on request; we may end early access or change what it includes, with notice. Before we charge for any plan, these terms gain its price, renewal, cancellation, refund and tax terms.
Third-party services
You may use the service through AI clients such as Claude or ChatGPT, sign in with Apple or Google, and, once paid plans open, pay through Airwallex. Others provide those services under their own terms and privacy policies, which govern your use of them. We are not responsible for them, or for what an AI client says or does with our data.
Intellectual property and feedback
The service, its software and documentation, and our compilation of the data belong to us and our licensors; these terms give you only the rights to use them that they state. Your queries, and the analyses you make from their results, are yours. If you send us feedback or ideas, we may use them without any obligation to you.
Suspension and termination
You may stop using the service, and ask us to delete your account, at any time. We may suspend or close an account, or revoke its keys and connections, if it breaks these terms, puts the service or others at risk, or the law requires it; where we can, we tell you first and why. The sections on the use of the data, not investment advice, intellectual property, disclaimers, limitation of liability, indemnity and governing law survive the end of this agreement.
Disclaimers
To the extent the law allows, the service is provided “as is” and “as available”, without warranties of any kind, express or implied, including of merchantability, fitness for a particular purpose, accuracy and non-infringement.
Limitation of liability
To the extent the law allows, we are not liable for indirect, incidental, special, consequential or punitive damages, or for lost profits, trading losses or lost data, arising from the service or these terms. Our total liability for all claims is limited to the greater of what you paid us for the service in the twelve months before the claim and US$100. Nothing in these terms limits a liability that the law does not allow to be limited.
Indemnity
You will indemnify us against claims, losses and costs, reasonable legal fees included, that arise from your breach of these terms or your misuse of the service or the data.
Governing law and disputes
Singapore law governs these terms, and the courts of Singapore may hear disputes about them, except where the law of your country gives you protections, or a court, that an agreement cannot set aside.
Changes to these terms
We may change these terms; the date at the top says when this version took effect. We announce a material change on this website and, if you have an account, by email, at least 30 days before it takes effect; using the service after that means you accept it. These terms may be offered in other languages for convenience; the English version governs.
Contact
Write to leto@proairos.com with questions about these terms, or see the support page.