--- url: "https://predictiontoolkit.com/tools/river-markets/" publisher: "PredictionToolkit" dateModified: "2026-11-02" --- [← Trading terminals]() ![River Markets logo]() Trading terminal # River Markets: manage execution across venue accounts River Markets provides a shared order-management layer across supported venue accounts. A web terminal and REST/WebSocket API combine book access, execution controls, positions, PnL and strategy-level subaccounts. [**3.5**/ 5Editorial rating]() [Editorial assessment]() [Open River Markets]() rivermarkets.com **Available on:** Web · API **Pricing:** Numeric fees are not publicly listed. Access and commercial terms are discussed through the demo/contact flow. [Screenshots]() [Explore alternatives]() **Availability: public** [Trading terminals]() [Aggregators]() +5 more [Data APIs]() [SDKs & libraries]() [Portfolio tracking]() [Strategy builders]() [Streaming data]() ## Screenshots and interface Product preview1 / 2 The page introduces a shared API layer across supported trading venues. ## What is River Markets? The published live venue list includes Kalshi, Polymarket, Polymarket US and Crypto.com; Novig is listed as in integration. Routing compares eligible matched contracts across connected venues rather than treating every market as interchangeable. The FAQ says funds remain in customer-controlled accounts at the connected venues. Prime-brokerage branding alone does not establish included margin, custody or cross-venue netting; those require separate discussion. Provider case-study improvements are not a fixed execution entitlement. ### Who it is for - Professional desks managing many simultaneous orders. - Developers building systematic execution. - Teams separating strategy books and performance. ## Market views and order controls - **Multi-book terminal and OMS** Place, modify and cancel orders from several books, and track orders, fills, positions and PnL in a unified blotter. - **Server-side complex orders** River manages Icebergs, Pegs and take-profit/stop-loss structures as parent/child workflows. Cancelling the parent unwinds its child-order workflow. - **Eligible-contract routing** Compare matched contracts across connected venues before evaluating actual all-in execution. - **Subaccounts and standard identifiers** Separate strategy books and attribute results, using river\_ids to reduce repeated venue-ticker mapping. - **Typed Python clients** The Python SDK offers typed synchronous and asynchronous clients. - **Locally signed transport** REST requests and WebSocket handshakes use local Ed25519 signatures. ## Terminal workflows ### Consolidate a desk Connect supported venue accounts and assign strategies to subaccounts for order and PnL tracking. ### Configure an iceberg Set total size, displayed tranche, limit price and post-only behavior, then monitor child orders by parent ID. ### Evaluate routing quality Compare actual fills including costs with the eligible venue alternatives instead of assuming a case-study average applies. ## Pricing and total cost Numeric fees are not publicly listed. Access and commercial terms are discussed through the demo/contact flow. ## Accounts and venue access 1. Read the quickstart and security documentation. 2. Confirm supported venue accounts and required permissions, then arrange access for the desk. 3. Configure signing credentials and subaccounts. 4. Test order creation, replacement and cancellation before relying on the workflow. 5. Monitor fills and reconcile connected venue balances. Access requires supported venue accounts and commercial arrangements; the FAQ says funds remain in customer-controlled venue accounts. ## Useful links ### What to check - Novig is in integration, not listed live. - Prime-brokerage branding does not establish included margin, custody or cross-venue netting. - Case-study price improvements are provider examples, not guaranteed results. - Connected venue scope and commercial access need checking for the intended desk. A closer look ## Ratings & reviews Editorial rating **3.5**/ 5 0 user reviews PredictionToolkit editorial ### Our take on River Markets The unified order manager, signed transport and explicit complex-order controls form a concrete professional integration offering. Commercial terms and venue rollout need checking, and algorithm descriptions or case studies should not be read as execution benchmarks. **Assessment criteria:** Task usefulness, documented scope, setup clarity, and access and cost transparency. **Assessment date:** 2026-10-05 **Documentation reviewed:** 2026-10-02 Documentation-based assessment. [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]() ![amparo terminal and local-signing overview]() ![amparo logo]()[amparo]() restricted Trading terminal**3.5**Editorial Compare supported venues, inspect local signing and use modular access with separate funding and contract checks. - Trading mode Manual - Access Web Also in Trading Terminals. ![OrderbookTrade explanation of its execution and platform workflow]() ![OrderbookTrade logo]()[OrderbookTrade]() restricted Infrastructure**3.0**Editorial Integrate order actions, matching and market-making tools through shared API and WebSocket infrastructure. - Access API Compare market-making infrastructure. ![Predictefy product overview]() ![Predictefy logo]()[Predictefy]() Data API**3.0**Editorial Normalized prediction-market data, matched contracts, replay and paper trading for multi-venue research. - Access Web · API · MCP Compare a broader developer data platform. ## Frequently asked questions about River Markets ### Can I use a terminal and an API? Yes. River provides a web terminal and REST/WebSocket access, with a typed Python SDK for integration. ### Which venues are listed live? Kalshi, Polymarket, Polymarket US and Crypto.com. Novig is separately listed as in integration. ### Does River pool customer funds? The FAQ says funds remain in the connected customer-controlled venue accounts. ### Where are complex orders managed? River manages the parent/child order workflow server-side. Parent-order cancellation controls that workflow. In this profile