--- url: "https://predictiontoolkit.com/tools/oddpool/" publisher: "PredictionToolkit" dateModified: "2026-11-02" --- [← Data APIs]() ![Oddpool logo]() Data API # Oddpool: separate research coverage from subscription access Oddpool combines public research dashboards with REST and WebSocket data for Polymarket and Kalshi. Free accounts and existing subscriptions continue, but the provider has closed new paid subscriptions. [**3.0**/ 5Editorial rating]() [Editorial assessment]() [Explore Oddpool]() oddpool.com **Available on:** Web · API **Pricing:** [See plans and costs ↓]() [Screenshots]() [Explore alternatives]() **Availability: restricted** [Data APIs]() [Historical data]() +2 more [Streaming data]() [Aggregators]() ## Screenshots and interface Product preview1 / 2 Public presentation of the two data-access approaches. ## What is Oddpool? The self-service interface connects event search to historical order books, trade records and normalized probability streams. Public macro, sports and market-difference views offer a way to explore the data before designing an integration. Keep the original venue and versioned references with your research so that a normalized observation can still be traced to its contract. Larger archive work is described separately: institutional delivery can involve tick history, book reconstruction and Parquet. Those capabilities are not implied by entry-tier API access. Closed paid signups also affect planning: listed legacy prices describe existing plans, rather than an upgrade a new user can purchase. ### Who it is for - Developers researching events across prediction venues. - Trading desks evaluating historical depth and trade records. - Macro researchers studying distributions implied by event outcomes. ## Features and coverage - **Event lookup** Search the normalized market catalog using an API key. - **Historical order books** Retrieve recorded book snapshots for a specific venue. - **Trade tape** Read executed trades with price, size and taker-side context. - **Probability streams** Receive supported normalized outcome probabilities through WebSocket. - **Versioned references** Retain market-reference versions so saved research remains identifiable later. - **Institutional archives** Discuss tick history, book reconstruction and Parquet delivery with the provider for larger ingestion workflows. - **Public research dashboards** Explore macro, sports, market differences and other public research views. ## Workflows with Oddpool ### Monitor an event distribution Find the event, save its reference IDs and stream the supported outcome probabilities. Examine the distribution across outcomes; a single headline percentage does not describe the entire event. ### Scope an archive integration Begin with a bounded historical-book and trade query. For an institutional pipeline, inspect an actual archive sample and its schema before estimating ingestion needs. ### Compare venue prices Establish matching event definitions and contract rules, then account for fees and spread when interpreting the quoted difference. ## Pricing and total cost New paid subscriptions are closed. Free accounts and existing subscriptions continue. The listed legacy Pro and Premium prices are $30/month and $100/month; neither is available for a new purchase. ### Free $0 - Public dashboards - 1,000 API requests/month - 1 WebSocket distribution connection ### Existing Pro subscriptions $30/month — closed to new subscriptions - Existing paid access continues ### Existing Premium subscriptions $100/month — closed to new subscriptions - Existing paid access continues **Access:** Closed paid signup does not mean the entire service has stopped. Confirm existing subscriber terms and any institutional delivery agreement separately. ## Getting started **Before you start:** New paid subscriptions are unavailable; do not design a new integration around purchasing a listed legacy upgrade. 1. Create an API key. 2. Send X-API-Key with an event search limited to the scope you need. 3. Save venue and reference IDs with the returned market. 4. Choose historical book/trade endpoints or the WebSocket stream. 5. Check account quotas and the delivery format required by your application. Institutional tick archives and bulk delivery require separate scoping from the entry API tier. [Read Oddpool API documentation]() ## Useful links - [Read subscription availability and pricing]() ### What to check - New paid subscriptions are unavailable; do not design a new integration around purchasing a listed legacy upgrade. - A normalized probability does not establish the size available for execution. - Contract rules at each venue determine whether outcomes are comparable. - Institutional archive coverage and delivery must be agreed separately from self-service API access. A closer look ## Ratings & reviews Editorial rating **3.0**/ 5 0 user reviews PredictionToolkit editorial ### Our take on Oddpool Public research views and documented data interfaces remain useful. Closed new paid subscriptions materially constrain upgrades and new production integrations, while existing-account and institutional terms need separate confirmation. Based on documented features, setup and access terms. [How we rate]() ### User reviews 0 The main score switches to user ratings after 5 published reviews. **Be the first to share your experience** A specific example helps the next person choose the right tool. ## Related tools [Browse category]() ![DepthFeed v3 API introduction and dataset scope]() ![DepthFeed logo]()[DepthFeed]() Data API**4.0**Editorial Retrieve recorded book ladders, sports mappings and aligned price bars for research and replay. - Access API · MCP Depth data with explicit self-service history windows. ![ARBITER unified API entry page and sample market view]() ![ARBITER logo]()[ARBITER]() Data API**3.5**Editorial Query normalized markets, historical books, wallet analytics and possible event matches across Polymarket and Kalshi. - Access API Another API for normalized historical and live data. ![OddsPipe cross-venue market and spread API overview]() ![OddsPipe logo]()[OddsPipe]() Data API**3.5**Editorial Find paired contracts, filter match confidence and investigate cross-venue price differences through REST or Python. - Access API A more focused API for spreads between matched markets. ## Frequently asked questions about Oddpool ### Can I start without an institutional contract? Yes. The free self-service tier includes 1,000 API requests per month, public dashboards and 1 WebSocket distribution connection. ### Can I subscribe to Pro or Premium now? The provider has closed new paid subscriptions. Free accounts and existing subscriptions continue; the listed legacy paid prices are not new-purchase offers. ### Does the historical API include trades? Yes. It documents trade endpoints as well as historical order-book data. ### How are large archives delivered? The institutional offering describes Parquet-oriented workflows. Agree coverage, delivery and terms with the provider rather than assuming the entry API tier includes them. In this profile