Venue Data Policy

Effective: TODO: effective date

This policy explains where the data sold as ProbNode comes from, what it is and is not, and how it relates to the venue it was recorded from.

ProbNode is not affiliated with, endorsed by, or sponsored by Polymarket.

This document is a draft pending legal review.

Where the Data Comes From

We record from two kinds of public source:

Polymarket's public market data feeds, from which our recorders capture order-book updates as they are broadcast;
the Polygon blockchain, read through a node we operate ourselves, from which trades are reconstructed from settled on-chain transactions.

We do not use private, privileged or non-public access to any venue, and we do not receive data from Polymarket under any agreement with it.

The data is historical order-book and trade data at millisecond resolution. Each row carries two timestamps: ts_exchange, the time stated by the venue, and ts_recv, the time our recorder received the message. The two are kept separate on purpose, so you can see latency and never have to guess which clock a value came from.

We record and package the data. We do not alter prices, sizes or outcomes, and we do not fill gaps with synthetic values.

Coverage and Gaps

Recording is imperfect: connections drop, feeds change and messages are missed. Every gap we know of is written into the coverage ledger, which records what was and was not captured for each market and hour. The ledger, like the catalog, is public, needs no key, and is meant to be cited.

The order-book tape starts at the point our recorders began capturing it, and grows forward. Trade history reconstructed from the chain reaches further back. The catalog and the ledger state which is which, market by market.

No Affiliation

ProbNode is an independent service. It is not affiliated with, endorsed by, or sponsored by Polymarket or any operator of the Polygon network. Polymarket's name is used only to identify where the data was recorded. Nothing on this website is a statement by, or on behalf of, Polymarket.

Questions about Polymarket's markets, rules, resolutions or accounts should go to Polymarket, not to us.

The Venue's Own Terms

The venue publishes its own terms of use, which may limit how data originating from it can be used, including by certain categories of business. Our licence to you covers our recording, and it does not override any obligation you owe the venue directly.

Before using the data, read the venue's current terms and make sure your use complies with them. If you are unsure whether they apply to you, take your own legal advice.

Not Advice

The data is provided as is, with its gaps published. It is not investment advice, not a trading signal and not a recommendation to trade on any market. Past order-book behaviour does not predict future outcomes.

Corrections and Contact