> Markdown version of [/tools/polyrails](https://launchpoly.com/tools/polyrails) — served by LaunchPoly, the directory of Polymarket, Kalshi and other prediction market tools. # polyrails The Polymarket CLOB V2 execution layer that works — non-custodial orders + builder attribution Works with[Polymarket](/tools?market=polymarket) [Developer Tools](/category/api), [Trading Bots](/category/trading-bots), [Data & APIs](/category/data) · free · API This tool's website may be down. Our automated check couldn't reach it recently — the link might not work until the owner fixes it. [Visit website](https://github.com/datarhan/polyrails) Vote0 votes. Upvote polyrails Share 1 / 2 ## About polyrails polyrails is a non-custodial Python library for placing orders on Polymarket's CLOB V2, built to work around a specific problem: since the 2026 deposit-wallet migration, the official Python and Rust SDKs reject order placement from new accounts, a known issue open on py-clob-client-v2 since May. polyrails packages the working flow instead. A user connects with just a private key, and the library derives API credentials and binds the V2 deposit wallet automatically, with no dashboard setup or manual key generation required. It handles limit and market orders, order cancellation, open-order and balance queries, and basic market data such as midpoint, spread, and order book depth. The library is designed so the private key never leaves the user's process, and there is no polyrails server involved in order flow. It also supports optional builder attribution codes on orders, set to 0 basis points by default, which can be overridden or disabled entirely. polyrails is MIT licensed and free to use, installed via pip, and the maintainer states it has been validated against real on-chain fills before publishing. It's aimed at developers and traders who need working programmatic access to Polymarket's CLOB V2 without wrestling with the deposit-wallet migration issues currently affecting the official SDKs. polyrails is a free developer tools tool built for Polymarket traders — The Polymarket CLOB V2 execution layer that works — non-custodial orders + builder attribution. It is listed in the LaunchPoly directory, where it was added on July 8, 2026 and currently has 0 community votes this round. polyrails is a small, non-custodial Python library for placing orders on Polymarket's CLOB V2. Since the 2026 deposit-wallet migration, the official Python/Rust SDKs reject order placement from new accounts (py-clob-client-v2 issue #70, open since May). polyrails packages the flow that actually works: connect with just your private key and it derives API credentials and binds your V2 deposit wallet automatically — no dashboard, no manual API keys. It supports limit and market orders, cancels, open-order and balance queries, and market data (midpoint/spread/book). Your key never leaves your process; there is no polyrails server. Every order can optionally carry a builder attribution code (0 bps by default — costs nothing, fully overridable or disable-able). MIT licensed, validated with real on-chain fills before publishing. pip install polyrails. ## Questions about polyrails ### What is polyrails? polyrails is a free developer tools tool for Polymarket. The Polymarket CLOB V2 execution layer that works — non-custodial orders + builder attribution ### Is polyrails free to use? Yes — polyrails is free to use. ### What category does polyrails belong to? polyrails is listed under Developer Tools, Trading Bots, Data & APIs on LaunchPoly's prediction market tools directory. ### How is polyrails ranked on LaunchPoly? polyrails is ranked by community votes from real traders. Votes reset every other Sunday, and it currently has 0 votes this round. ## At a glance Category Developer Tools, Trading Bots, Data & APIs Pricing free Works with Polymarket Platforms API Votes this round 0 Listed July 8, 2026 Updated October 15, 2026 ### Links [GitHub](https://github.com/datarhan/polyrails) Report Support this tool ## Boost polyrails Give this listing a sponsored homepage card. Anyone can buy a Boost, including guests. - **3 days**$15 - **7 days**$29 - **14 days**$49 - Review available dates before paying - Clearly labelled as sponsored - Community votes and ranking stay unchanged Boost this listing One-time card payment. You are buying promotion, not ownership of the listing. [Choose another listing →](/boosts) Support this tool ## Boost polyrails Give this listing a sponsored homepage card. Anyone can buy a Boost, including guests. - **3 days**$15 - **7 days**$29 - **14 days**$49 - Review available dates before paying - Clearly labelled as sponsored - Community votes and ranking stay unchanged Boost this listing One-time card payment. You are buying promotion, not ownership of the listing. [Choose another listing →](/boosts) ## More like this [All Developer Tools](/category/api) [ ### Polymtrade Trade in new markets and earn from prediction market fees 41 votes this round ](/tools/polymtrade)[ ### Spectral Edge Physics-trained AI for BTC prediction markets. 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