Get started with OddsRail.

OddsRail gives Claude tools to read Polymarket markets, review proposed orders and trade from your computer after you configure access.

1. Install the extension.Open the .mcpb file in a current Claude Desktop version with extension support, or drag it into Settings → Extensions. Claude Desktop supplies the Python runtime.
2. Keep “Paper trading” checked.The default setup simulates orders against the live book. Leave the wallet key empty while exploring.
3. Check the connection.Ask Claude to call server_info, confirm dry_run: true and show the configured spending limits.

Use your own Claude access. Keep the app and computer running while using the local tools.

In the builder, choose strategies, select markets and set your requested limits. Choose “My own agent”, then continue to Claude Desktop setup.

The brief preserves your selected outcome IDs, settings and notes. It asks Claude for read-only analysis. Your draft remains saved in that browser.

These are the strategy settings available in the builder. Claude can review their requirements using the local tools.

⇄ Quote both sides

Propose a buy quote on each selected outcome. Set shares per outcome and the distance below its midpoint in cents.

↘ Fade sharp moves

Look for a recent price jump with historical evidence of reversion. Set a minimum move and lookback period.

◎ High-probability outcomes

Review outcomes inside your entry-price range, with resolution criteria and remaining upside checked.

◈ Trade my forecast

Compare your stated probability with market prices. Set the minimum edge and sizing fraction.

↗ Follow momentum

Review moves above your threshold over the selected lookback, subject to volume and spread checks.

Price and share size are different: 20 shares at $0.48 have $9.60 of notional before fees. Animations illustrate the rules; they are not live signals or performance forecasts.

Website sign-in

A wallet signature verifies ownership for your OddsRail session. It does not authorize an agent to trade.

Trading-account connection

Authenticated exchange reads can show cash, approvals and orders. Public holdings alone do not tell you what is available to spend.

Local signing

The desktop extension uses the signer key for your existing compatible Polymarket account. Website sign-in does not configure this local connection.

Trading-account and signer addresses may differ. Use the account belonging to your signer; an unrelated wallet address will not give it access.

1. Prepare your Polymarket account.Use an existing compatible account with funds and trading approvals already set up. The installer does not create or fund one for you.
2. Configure the extension locally.Enter the matching signer private key and trading account's public wallet address in the extension settings. Never put a private key in a chat or on this website.
3. Review controls and the proposed order.Check the local caps below. Ask Claude to inspect the exact market, outcome, side, price and shares, and run quote_cost and check_order.
4. Enable live mode only when ready.Deliberately uncheck “Paper trading”, confirm the new mode with server_info, and separately approve the live order in your client.

check_order is a separate review tool; it is not automatically called by every order submission. A successful check does not place or authorize an order.

Restarting the extension resets the session counter. It is not a daily loss limit, an account-wide budget or a cap shared across multiple installations.

The builder's allocated capital, stop loss, daily loss rule and position limits remain requested settings. Copying a brief does not turn them into enforced local controls.

Website activation still needs session-key access and the completed trading integration. A saved draft, wallet sign-in or readiness check does not activate it.

The available path today is supervised use of the local Claude tools. It does not keep a website strategy running in the background.

Still stuck? Open a support issue with your version and the error. Remove keys, credentials and other sensitive details.

For your own MCP client, install the Python package and launch oddsrail as a local stdio server. Python 3.11 or newer is required.

pip install oddsrail==0.18.1
claude mcp add --transport stdio oddsrail -- oddsrail

Review begins with server_info, find_markets(query, venues="polymarket"), get_market, quote_cost and check_order. Reading a market and submitting an order are separate operations.