Pre-trade risk
Go
Python
C++
JS
Rust
C API
Open source
Apache 2.0

Embeddable pre-⁠trade risk engine

Check orders before you send them to a venue. OpenPit evaluates your policies, reserves state for accepted orders, and returns reasons for rejection.

An in-process SDK for your trading application. Go, Python, JavaScript/TypeScript, C++, Rust, and C.

Try the playground Try it in Pit Officer

Start with the docs

Built-in checks, custom policies

Control spendable funds, validate orders, cap quantity and notional, throttle order flow, and halt accounts when realized P&L breaches bounds.

Spot funds Order validation Rate limit Order size limit P&L kill switch Build a custom policy

Scope anything. Global, per account, or per account group.

Supply prices for individual accounts, configure controls for an entire account group, and define your own rules through the policy API.

Policy catalog Account groups

Where it fits

Embed the engine before order routing. Your application commits or rolls back reservations and reports execution outcomes to keep risk state current.

You own venue connectivity, persistent storage, market data, and coordination around a shared engine. OpenPit is an in-memory component of that system.

Order lifecycle Threading contract

Start in your language

Follow the installation guide and run its first example. Native runtime setup differs by SDK.

Go

Go API with a native runtime. Requires cgo and a C compiler.

go get go.openpit.dev/openpit

Installation & example API reference

Python

Typed Python API. Published wheels include the native runtime.

pip install openpit

Installation & example API reference PyPI package

JavaScript / TypeScript

WebAssembly for browsers and server runtimes, with TypeScript types.

npm install @openpit/engine

Installation & example API reference npm

C++

C++17 and CMake. Install the SDK package before configuring your application.

find_package(OpenPit CONFIG REQUIRED)

Installation & example API reference

Rust

Use the Rust engine directly, with a runnable example in the crate guide.

cargo add openpit

Installation & example Crate & documentation

C

C ABI for native applications. Install and link the native runtime first.

#include <openpit.h>

Installation & example API reference

OpenPit is pre-1.0: minor releases may change public APIs. Review release notes before choosing or upgrading a version.

Release notes

Explore the integration

Integrate with an AI coding assistant Runnable examples Architecture & concepts Generated API references Documentation index for AI tools

Pit Officer is a separate control plane built on OpenPit, with a dashboard, REST API, and MCP server.

Explore Pit Officer