polyoxide-clob

Rust client library for Polymarket CLOB (Central Limit Order Book) API.

Provides authenticated order creation, EIP-712 signing, and submission, plus read-only market data and order book access. Part of the polyoxide workspace.

More information about this crate can be found in the crate documentation.

Features

• Order Management: Create, sign, and post limit and market orders with EIP-712
• Market Data: Order books, prices, midpoints, spreads, last trade prices, and price history
• Account Management: Balances, allowances, trade history, and session heartbeats
• API Key Management: Create, list, and delete standard, read-only, and builder API keys
• Liquidity Rewards: Query earnings, percentages, and reward markets
• RFQ Trading: Request-for-quote creation, quoting, acceptance, and approval
• Notifications: List and dismiss user notifications
• WebSocket: Real-time market data and user order/trade updates (feature-gated)

Installation

cargo add polyoxide-clob

Feature Flags

# With WebSocket support
cargo add polyoxide-clob --features ws

# Without the gamma dependency
cargo add polyoxide-clob --no-default-features

Authentication

The CLOB API uses two authentication layers:

• L1 (EIP-712): On-chain signing with a private key via alloy. Used for API key creation/derivation.
• L2 (HMAC-SHA256): Signing with API credentials. Used for order management, account operations, and all authenticated endpoints.

Both layers are managed through the Account type.

Environment Variables

POLYMARKET_PRIVATE_KEY        # Hex-encoded private key
POLYMARKET_API_KEY            # L2 API key
POLYMARKET_API_SECRET         # L2 API secret (base64)
POLYMARKET_API_PASSPHRASE     # L2 API passphrase

Usage

Client Construction

use polyoxide_clob::{Account, Chain, Clob, ClobBuilder, Credentials};

// Read-only client (no authentication, market data only)
let clob = Clob::public();

// Authenticated client from Account
let account = Account::from_env()?;
let clob = Clob::from_account(account)?;

// Shorthand: private key + credentials directly
let clob = Clob::new("0xprivate_key", credentials)?;

// Full builder control
let clob = ClobBuilder::new()
    .with_account(account)
    .chain(Chain::PolygonMainnet)
    .base_url("https://clob.polymarket.com")
    .timeout_ms(30_000)
    .pool_size(10)
    .max_concurrent(16)       // default: 8
    .build()?;

Account Configuration

use polyoxide_clob::{Account, Credentials};

// From environment variables
let account = Account::from_env()?;

// From a JSON file
let account = Account::from_file("config/account.json")?;

// From the OS keychain (feature `keychain`)
let account = Account::from_keychain()?;

// Direct construction
let credentials = Credentials {
    key: "api_key".to_string(),
    secret: "api_secret".to_string(),
    passphrase: "passphrase".to_string(),
};
let account = Account::new("0x...", credentials)?;

API Namespaces

The client organizes endpoints into namespaces. Public namespaces are always available; authenticated namespaces return Result<_, ClobError> and require an Account.

Market Data (public)

use polyoxide_clob::{Clob, OrderSide};

let clob = Clob::public();

// List markets (paginated)
let markets = clob.markets().list().send().await?;

// Get a single market by condition ID
let market = clob.markets().get("0xcondition_id").send().await?;

// Order book
let book = clob.markets().order_book("token_id").send().await?;
println!("{} bids, {} asks", book.bids.len(), book.asks.len());

// Price, midpoint, spread
let price = clob.markets().price("token_id", OrderSide::Buy).send().await?;
let mid = clob.markets().midpoint("token_id").send().await?;
let spread = clob.markets().spread("token_id").send().await?;

// Last trade price and price history
let last = clob.markets().last_trade_price("token_id").send().await?;
let history = clob.markets().prices_history("token_id").send().await?;

// Batch operations (multiple tokens at once)
use polyoxide_clob::BookParams;
let params = vec![BookParams { token_id: "t1".into(), side: None }];
let books = clob.markets().order_books(&params).await?;

Placing Orders (authenticated)

use polyoxide_clob::{Account, Clob, CreateOrderParams, OrderKind, OrderSide};

let account = Account::from_env()?;
let clob = Clob::from_account(account)?;

// place_order: create + sign + post in one call
let params = CreateOrderParams {
    token_id: "token_id".to_string(),
    price: 0.52,
    size: 100.0,
    side: OrderSide::Buy,
    order_type: OrderKind::Gtc,
    post_only: false,
    expiration: None,
    funder: None,
    signature_type: None,
};

let response = clob.place_order(&params, None).await?;
if response.success {
    println!("Order placed: {:?}", response.order_id);
}

// Or step-by-step: create, sign, then post
let order = clob.create_order(&params, None).await?;
let signed = clob.sign_order(&order).await?;
let response = clob.post_order(&signed, OrderKind::Gtc, false).await?;

Order Management (authenticated)

// List your orders
let orders = clob.orders()?.list().send().await?;

// Get a specific order
let order = clob.orders()?.get("order_id").send().await?;

// Cancel a single order
let result = clob.orders()?.cancel("order_id").send().await?;

// Cancel multiple orders (up to 3000)
let result = clob.orders()?.cancel_many(vec!["id1".into(), "id2".into()]).await?;

// Cancel all open orders
let result = clob.orders()?.cancel_all().await?;

// Check reward scoring status
let scoring = clob.orders()?.is_scoring("order_id").send().await?;

Account Operations (authenticated)

// Token balance and allowance
let bal = clob.account_api()?.balance_allowance("token_id").send().await?;

// USDC balance
let usdc = clob.account_api()?.usdc_balance().send().await?;

// Trade history with filters
let trades = clob.account_api()?.trades()
    .market("0xcondition_id")
    .after("1700000000")
    .send()
    .await?;

// Builder trades
let builder_trades = clob.account_api()?.builder_trades().send().await?;

Health and Latency

let clob = Clob::public();

// Measure API round-trip time
let latency = clob.health().ping().await?;
println!("Latency: {}ms", latency.as_millis());

// Server time
let time = clob.health().server_time().send().await?;

WebSocket (feature ws)

Market Channel

Subscribe to real-time order book and price updates (no authentication required):

use polyoxide_clob::ws::{WebSocket, Channel, MarketMessage};
use futures_util::StreamExt;

let mut ws = WebSocket::connect_market(vec![
    "asset_id".to_string(),
]).await?;

while let Some(msg) = ws.next().await {
    match msg? {
        Channel::Market(MarketMessage::Book(book)) => {
            println!("Order book: {} bids, {} asks", book.bids.len(), book.asks.len());
        }
        Channel::Market(MarketMessage::PriceChange(pc)) => {
            println!("Price change: {:?}", pc.price_changes);
        }
        _ => {}
    }
}

User Channel

Subscribe to authenticated order and trade updates:

use polyoxide_clob::ws::{ApiCredentials, WebSocket, Channel, UserMessage};
use futures_util::StreamExt;

let credentials = ApiCredentials::from_env()?;

let mut ws = WebSocket::connect_user(
    vec!["condition_id".to_string()],
    credentials,
).await?;

while let Some(msg) = ws.next().await {
    match msg? {
        Channel::User(UserMessage::Order(order)) => {
            println!("Order update: {} {:?}", order.id, order.order_type);
        }
        Channel::User(UserMessage::Trade(trade)) => {
            println!("Trade: {} @ {}", trade.size, trade.price);
        }
        _ => {}
    }
}

Auto-Ping with WebSocketBuilder

For long-running connections with automatic keep-alive:

use polyoxide_clob::ws::{WebSocketBuilder, Channel};
use std::time::Duration;

let ws = WebSocketBuilder::new()
    .ping_interval(Duration::from_secs(10))
    .connect_market(vec!["asset_id".to_string()])
    .await?;

ws.run(|msg| async move {
    println!("Received: {:?}", msg);
    Ok(())
}).await?;

License

Licensed under either of MIT or Apache-2.0 at your option.