Chinese Version: 📦 存档数据 API

This API only provides access to historical archived data for research, backtesting, market analysis, and model evaluation.

Introduction

iflow.work used to collect price, order book, and trading volume data for Dota 2 and CS2 items across Steam and several third-party trading platforms. As the project is no longer maintained, no new real-time data will be produced. However, the historical snapshots accumulated over the past few years remain valuable for research, so we have organized the Datadump archives and will continue making them available to people with analytical needs.

The archives are divided into two categories. Both come from the same underlying item snapshot data; the difference is the export scope.

• Priority Archive: a selected subset of higher-priority item snapshots, mainly covering items that were more useful for observing arbitrage opportunities at the time. The newer Priority snapshots usually contain 3,000-4,000 items. For most strategy validation, price trend analysis, and market opportunity backtesting, this archive should be sufficient.
• Base Archive: a more complete full snapshot, intended to include as many trackable Dota 2 / CS2 items as possible at the time. It is more suitable for analyses that require a full market cross-section, long-tail item coverage, or a closer reconstruction of the historical market state.

If you need a standalone list of item IDs and cross-platform mappings, please refer to SteamTradingSite-ID-Mapper. That repository provides ID mappings for Dota 2 / CS2 tradable items between the Steam Market and platforms such as BUFF, IGXE, C5, and UUYP.

The full Priority Archive remains freely available, covering 2022/04/18 - 2026/05/20. For users who need more complete data, the Base Archive is also available. We provide the Base Archive from 2026/04/01 - 2026/05/20 as a free sample, so you can inspect the schema, coverage, and data quality before deciding whether the full archive fits your needs.

Data Availability

Full Base Archive

Priority Archive remains freely available. For most research, backtesting, and strategy validation, it should already be a strong starting point.

If your analysis needs a more complete market cross-section, long-tail item coverage, or full historical samples, you may consider using Base Archive. The full Base Archive is much larger, and long-term storage and file distribution both involve ongoing costs. For this reason, Base Archive files before 2026/04/01 require an API KEY. Purchasing an API KEY also helps support the continued storage and distribution of the archive, and I sincerely appreciate your support for the project.

The API KEY price is 200 USD / 1350 CNY. Before purchasing, please download the free Base Archive sample first and, if useful, compare it with the Priority Archive from the same period. Use the sample to test the schema, file size, parsing workflow, and item coverage before paying. Both archives come from the same underlying collection snapshots, so price and order fields follow essentially the same data-quality baseline for the same period; Base Archive mainly provides broader item coverage and a fuller market cross-section. The full historical range is still affected by platform API availability, rate limits, and collector status in each period, so please review the known data quality notes before purchasing.

Ways to obtain an API KEY:

• Order via Afdian (CNY / WeChat Pay / Alipay)
• Order via Ko-fi (USD / PayPal / credit card)
• Crypto payment: please email [email protected]; API KEYs are issued manually after confirmation.

API Usage