PolymarketDocumentation/docs/trading/orders/create.md

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Create Order

Build, sign, and submit orders

All orders on Polymarket are expressed as limit orders. Market orders are supported by submitting a limit order with a marketable price — your order executes immediately at the best available price on the book.

The SDK handles EIP-712 signing and submission for you. If you prefer the REST API directly, see [Authentication](/api-reference/authentication) for constructing the required headers and the [API Reference](/api-reference/introduction) for full endpoint documentation including the raw order object fields and request/response schemas.

---

Order Types

Type	Behavior	Use Case
GTC	Good-Til-Cancelled — rests on the book until filled or cancelled	Default for limit orders
GTD	Good-Til-Date — active until a specified expiration time	Auto-expire before known events
FOK	Fill-Or-Kill — must fill immediately and entirely, or cancel	All-or-nothing market orders
FAK	Fill-And-Kill — fills what's available immediately, cancels the rest	Partial-fill market orders

• GTC and GTD are limit order types — they rest on the book at your specified price.
• FOK and FAK are market order types — they execute against resting liquidity immediately.
  • BUY: specify the dollar amount you want to spend
  • SELL: specify the number of shares you want to sell

---

Limit Orders

The simplest way to place a limit order — create, sign, and submit in one call:

```typescript TypeScript theme={null} import { ClobClient, Side, OrderType } from "@polymarket/clob-client-v2";

const response = await client.createAndPostOrder( { tokenID: "TOKEN_ID", price: 0.5, size: 10, side: Side.BUY, }, { tickSize: "0.01", negRisk: false, }, OrderType.GTC, );

console.log("Order ID:", response.orderID); console.log("Status:", response.status);

```python Python theme={null}
from py_clob_client_v2 import OrderArgs, OrderType, PartialCreateOrderOptions
from py_clob_client_v2.order_builder.constants import BUY

response = client.create_and_post_order(
    OrderArgs(
        token_id="TOKEN_ID",
        price=0.50,
        size=10,
        side=BUY,
    ),
    options=PartialCreateOrderOptions(tick_size="0.01", neg_risk=False),
    order_type=OrderType.GTC
)

print("Order ID:", response["orderID"])
print("Status:", response["status"])

use polymarket_client_sdk_v2::clob::types::Side;
use polymarket_client_sdk_v2::types::dec;

let token_id = "TOKEN_ID".parse()?;
let order = client
    .limit_order()
    .token_id(token_id)
    .price(dec!(0.50))
    .size(dec!(10))
    .side(Side::Buy)
    .build()
    .await?;
let signed = client.sign(&signer, order).await?;
let response = client.post_order(signed).await?;

println!("Order ID: {}", response.order_id);
println!("Status: {:?}", response.status);

Two-Step Sign Then Submit

For more control, you can separate signing from submission. This is useful for batch orders or custom submission logic:

```typescript TypeScript theme={null} // Step 1: Create and sign locally const signedOrder = await client.createOrder( { tokenID: "TOKEN_ID", price: 0.5, size: 10, side: Side.BUY, }, { tickSize: "0.01", negRisk: false }, );

// Step 2: Submit to the CLOB const response = await client.postOrder(signedOrder, OrderType.GTC);

```python Python theme={null}
# Step 1: Create and sign locally
signed_order = client.create_order(
    OrderArgs(
        token_id="TOKEN_ID",
        price=0.50,
        size=10,
        side=BUY,
    ),
    options=PartialCreateOrderOptions(tick_size="0.01", neg_risk=False)
)

# Step 2: Submit to the CLOB
response = client.post_order(signed_order, OrderType.GTC)

// Step 1: Create order (auto-fetches tick size, neg risk, fee rate)
let order = client
    .limit_order()
    .token_id("TOKEN_ID".parse()?)
    .price(dec!(0.50))
    .size(dec!(10))
    .side(Side::Buy)
    .build()
    .await?;

// Step 2: Sign and submit separately
let signed = client.sign(&signer, order).await?;
let response = client.post_order(signed).await?;

---

GTD Orders

GTD orders auto-expire at a specified time. Useful for quoting around known events.

```typescript TypeScript theme={null} // Expire in 1 hour (+ 60s security threshold buffer) const expiration = Math.floor(Date.now() / 1000) + 60 + 3600;

const response = await client.createAndPostOrder( { tokenID: "TOKEN_ID", price: 0.5, size: 10, side: Side.BUY, expiration, }, { tickSize: "0.01", negRisk: false }, OrderType.GTD, );

```python Python theme={null}
import time

# Expire in 1 hour (+ 60s security threshold buffer)
expiration = int(time.time()) + 60 + 3600

response = client.create_and_post_order(
    OrderArgs(
        token_id="TOKEN_ID",
        price=0.50,
        size=10,
        side=BUY,
        expiration=expiration,
    ),
    options=PartialCreateOrderOptions(tick_size="0.01", neg_risk=False),
    order_type=OrderType.GTD
)

use chrono::{TimeDelta, Utc};
use polymarket_client_sdk_v2::clob::types::OrderType;

let order = client
    .limit_order()
    .token_id("TOKEN_ID".parse()?)
    .price(dec!(0.50))
    .size(dec!(10))
    .side(Side::Buy)
    .order_type(OrderType::GTD)
    .expiration(Utc::now() + TimeDelta::minutes(1) + TimeDelta::hours(1))
    .build()
    .await?;
let signed = client.sign(&signer, order).await?;
let response = client.post_order(signed).await?;

GTD orders expire one minute before their stated expiration as a security threshold. To set an effective lifetime of N seconds, use `now + 60 + N`. In addition, the expiration must be at least three minutes in the future — orders expiring sooner are rejected — so the minimum effective lifetime is about two minutes.

---

Market Orders

Market orders execute immediately against resting liquidity using FOK or FAK types:

```typescript TypeScript theme={null} import { Side, OrderType } from "@polymarket/clob-client-v2";

// FOK BUY: spend exactly $100 or cancel entirely const buyOrder = await client.createMarketOrder( { tokenID: "TOKEN_ID", side: Side.BUY, amount: 100, // dollar amount price: 0.5, // worst-price limit (slippage protection) }, { tickSize: "0.01", negRisk: false }, ); await client.postOrder(buyOrder, OrderType.FOK);

// FOK SELL: sell exactly 200 shares or cancel entirely const sellOrder = await client.createMarketOrder( { tokenID: "TOKEN_ID", side: Side.SELL, amount: 200, // number of shares price: 0.45, // worst-price limit (slippage protection) }, { tickSize: "0.01", negRisk: false }, ); await client.postOrder(sellOrder, OrderType.FOK);

```python Python theme={null}
from py_clob_client_v2.order_builder.constants import BUY, SELL
from py_clob_client_v2 import MarketOrderArgs, OrderType, PartialCreateOrderOptions

# FOK BUY: spend exactly $100 or cancel entirely
buy_order = client.create_market_order(
    order_args=MarketOrderArgs(
        token_id="TOKEN_ID",
        side=BUY,
        amount=100,  # dollar amount
        price=0.50,  # worst-price limit (slippage protection)
    ),
    options=PartialCreateOrderOptions(tick_size="0.01", neg_risk=False),
)
client.post_order(buy_order, OrderType.FOK)

# FOK SELL: sell exactly 200 shares or cancel entirely
sell_order = client.create_market_order(
    order_args=MarketOrderArgs(
        token_id="TOKEN_ID",
        side=SELL,
        amount=200,  # number of shares
        price=0.45,  # worst-price limit (slippage protection)
    ),
    options=PartialCreateOrderOptions(tick_size="0.01", neg_risk=False),
)
client.post_order(sell_order, OrderType.FOK)

use polymarket_client_sdk_v2::clob::types::{Amount, OrderType, Side};

let token_id = "TOKEN_ID".parse()?;

// FOK BUY: spend exactly $100 or cancel entirely
let buy = client
    .market_order()
    .token_id(token_id)
    .amount(Amount::usdc(dec!(100))?)
    .price(dec!(0.50)) // worst-price limit (slippage protection)
    .side(Side::Buy)
    .order_type(OrderType::FOK)
    .build()
    .await?;
let signed = client.sign(&signer, buy).await?;
client.post_order(signed).await?;

// FOK SELL: sell exactly 200 shares or cancel entirely
let sell = client
    .market_order()
    .token_id(token_id)
    .amount(Amount::shares(dec!(200))?)
    .price(dec!(0.45)) // worst-price limit (slippage protection)
    .side(Side::Sell)
    .order_type(OrderType::FOK)
    .build()
    .await?;
let signed = client.sign(&signer, sell).await?;
client.post_order(signed).await?;

• FOK — fill entirely or cancel the whole order
• FAK — fill what's available, cancel the rest

The price field on market orders acts as a worst-price limit (slippage protection), not a target execution price.

One-Step Market Order

For convenience, createAndPostMarketOrder handles creation, signing, and submission in one call:

```typescript TypeScript theme={null} const response = await client.createAndPostMarketOrder( { tokenID: "TOKEN_ID", side: Side.BUY, amount: 100, price: 0.5, }, { tickSize: "0.01", negRisk: false }, OrderType.FOK, ); ```

from py_clob_client_v2 import MarketOrderArgs, OrderType, PartialCreateOrderOptions
from py_clob_client_v2.order_builder.constants import BUY

response = client.create_and_post_market_order(
    order_args=MarketOrderArgs(
        token_id="TOKEN_ID",
        side=BUY,
        amount=100,
        price=0.50,
    ),
    options=PartialCreateOrderOptions(tick_size="0.01", neg_risk=False),
    order_type=OrderType.FOK,
)

let order = client
    .market_order()
    .token_id("TOKEN_ID".parse()?)
    .amount(Amount::usdc(dec!(100))?)
    .price(dec!(0.50))
    .side(Side::Buy)
    .order_type(OrderType::FOK)
    .build()
    .await?;
let signed = client.sign(&signer, order).await?;
let response = client.post_order(signed).await?;

---

Post-Only Orders

Post-only orders guarantee you're always the maker. If the order would match immediately (cross the spread), it's rejected instead of executed.

```typescript TypeScript theme={null} const response = await client.postOrder(signedOrder, OrderType.GTC, true); ```

response = client.post_order(signed_order, OrderType.GTC, post_only=True)

let order = client
    .limit_order()
    .token_id("TOKEN_ID".parse()?)
    .price(dec!(0.50))
    .size(dec!(10))
    .side(Side::Buy)
    .post_only(true)
    .build()
    .await?;
let signed = client.sign(&signer, order).await?;
let response = client.post_order(signed).await?;

• Only works with GTC and GTD order types
• Rejected if combined with FOK or FAK

---

Batch Orders

Place up to 15 orders in a single request:

```typescript TypeScript theme={null} import { OrderType, Side, PostOrdersArgs } from "@polymarket/clob-client-v2";

const orders: PostOrdersArgs[] = [ { order: await client.createOrder( { tokenID: "TOKEN_ID", price: 0.48, side: Side.BUY, size: 500, }, { tickSize: "0.01", negRisk: false }, ), orderType: OrderType.GTC, }, { order: await client.createOrder( { tokenID: "TOKEN_ID", price: 0.52, side: Side.SELL, size: 500, }, { tickSize: "0.01", negRisk: false }, ), orderType: OrderType.GTC, }, ];

const response = await client.postOrders(orders);

```python Python theme={null}
from py_clob_client_v2 import OrderArgs, OrderType, PostOrdersV2Args, PartialCreateOrderOptions
from py_clob_client_v2.order_builder.constants import BUY, SELL

response = client.post_orders([
    PostOrdersV2Args(
        order=client.create_order(OrderArgs(
            price=0.48,
            size=500,
            side=BUY,
            token_id="TOKEN_ID",
        ), options=PartialCreateOrderOptions(tick_size="0.01", neg_risk=False)),
        orderType=OrderType.GTC,
    ),
    PostOrdersV2Args(
        order=client.create_order(OrderArgs(
            price=0.52,
            size=500,
            side=SELL,
            token_id="TOKEN_ID",
        ), options=PartialCreateOrderOptions(tick_size="0.01", neg_risk=False)),
        orderType=OrderType.GTC,
    ),
])

let token_id = "TOKEN_ID".parse()?;

let bid = client
    .limit_order()
    .token_id(token_id)
    .price(dec!(0.48))
    .size(dec!(500))
    .side(Side::Buy)
    .build()
    .await?;
let ask = client
    .limit_order()
    .token_id(token_id)
    .price(dec!(0.52))
    .size(dec!(500))
    .side(Side::Sell)
    .build()
    .await?;

let signed_bid = client.sign(&signer, bid).await?;
let signed_ask = client.sign(&signer, ask).await?;
let response = client.post_orders(vec![signed_bid, signed_ask]).await?;

---

Order Options

Every order requires two market-specific options: tickSize and negRisk. For details on signature types (0 = EOA, 1 = POLY_PROXY, 2 = GNOSIS_SAFE, 3 = POLY_1271 deposit wallet), see Authentication.

Tick Sizes

Your order price must conform to the market's tick size, or the order is rejected.

Tick Size	Precision	Example Prices
0.1	1 decimal	0.1, 0.2, 0.5
0.01	2 decimals	0.01, 0.50, 0.99
0.001	3 decimals	0.001, 0.500, 0.999
0.0001	4 decimals	0.0001, 0.5000, 0.9999
0.0025	0.25¢ steps	0.0025, 0.5000, 0.9975

The `0.0025` (0.25¢) tick size applies only to World Cup *to advance*, *moneyline*, *spreads*, and *totals* markets. Always fetch the market's tick size before quoting rather than assuming a value. ```typescript TypeScript theme={null} const tickSize = await client.getTickSize("TOKEN_ID"); ```

tick_size = client.get_tick_size("TOKEN_ID")

let token_id = "TOKEN_ID".parse()?;
let tick_size = client.tick_size(token_id).await?;

Negative Risk

Multi-outcome events (3+ outcomes) use the Neg Risk CTF Exchange. Pass negRisk: true for these markets.

```typescript TypeScript theme={null} const isNegRisk = await client.getNegRisk("TOKEN_ID"); ```

is_neg_risk = client.get_neg_risk("TOKEN_ID")

let token_id = "TOKEN_ID".parse()?;
let is_neg_risk = client.neg_risk(token_id).await?;

Both values are also available on the market object: `minimum_tick_size` and `neg_risk`. In Rust, the order builder auto-fetches both — you don't need to look them up manually.

---

Prerequisites

Before placing an order, your funder address must have approved the Exchange contract to spend the relevant tokens:

• BUY orders: pUSD allowance >= spending amount
• SELL orders: conditional token allowance >= selling amount

Order size is limited by your available balance minus amounts reserved by existing open orders:

\text{maxOrderSize} = \text{balance} - \sum(\text{openOrderSize} - \text{filledAmount})

Orders are continuously monitored for validity — balances and allowances are tracked in real time. Any maker caught intentionally abusing these checks will be blacklisted.

Sports Markets

Sports markets have additional behaviors:

• Outstanding limit orders are automatically cancelled once the game begins, clearing the entire order book at the official start time
• Marketable orders have a 1-second placement delay before matching
• Game start times can shift — monitor your orders closely, as they may not be cleared if the start time changes unexpectedly

---

Response

A successful order placement returns:

{
  "success": true,
  "errorMsg": "",
  "orderID": "0xabc123...",
  "takingAmount": "",
  "makingAmount": "",
  "status": "live",
  "transactionsHashes": [],
  "tradeIDs": []
}

Statuses

Status	Description
live	Order resting on the book
matched	Order matched immediately with a resting order
delayed	Marketable order accepted into an asynchronous matching delay
unmatched	Marketable but failed to delay — placement still successful

Selected crypto and finance up/down markets apply a 250 ms taker delay to marketable orders. To check a specific market, call `GET https://clob.polymarket.com/clob-markets/{condition_id}` or SDK `getClobMarketInfo(conditionID)` and look for `itode: true`. The API waits for this short hold and returns the final order result, so these orders usually return `matched`, `live`, or `unmatched` rather than `delayed`. Orders cannot be canceled while they are pending in the delay window.

Error Messages

Error	Description
INVALID_ORDER_MIN_TICK_SIZE	Price doesn't conform to the market's tick size
INVALID_ORDER_MIN_SIZE	Order size below the minimum threshold
INVALID_ORDER_DUPLICATED	Identical order already placed
INVALID_ORDER_NOT_ENOUGH_BALANCE	Insufficient balance or allowance
INVALID_ORDER_EXPIRATION	Expiration timestamp is in the past
INVALID_POST_ONLY_ORDER_TYPE	Post-only used with FOK/FAK
INVALID_POST_ONLY_ORDER	Post-only order would cross the book
FOK_ORDER_NOT_FILLED_ERROR	FOK order couldn't be fully filled
INVALID_ORDER_ERROR	System error inserting the order
EXECUTION_ERROR	System error executing the trade
ORDER_DELAYED	Order match delayed due to market conditions
DELAYING_ORDER_ERROR	System error while delaying the order
MARKET_NOT_READY	Market not yet accepting orders

---

Heartbeat

The heartbeat endpoint maintains session liveness. If a valid heartbeat is not received within 10 seconds (with a 5-second buffer), all open orders are cancelled.

```typescript TypeScript theme={null} let heartbeatId = ""; setInterval(async () => { const resp = await client.postHeartbeat(heartbeatId); heartbeatId = resp.heartbeat_id; }, 5000); ```

import time

heartbeat_id = ""
while True:
    resp = client.post_heartbeat(heartbeat_id)
    heartbeat_id = resp["heartbeat_id"]
    time.sleep(5)

// With the `heartbeats` feature, the Rust SDK can auto-send heartbeats
// in a background task — no manual loop needed:
Client::start_heartbeats(&mut client)?;
// ... your trading logic ...
client.stop_heartbeats().await?;

// Or send manually:
let resp = client.post_heartbeat(None).await?; // None for first call
let resp = client.post_heartbeat(Some(resp.heartbeat_id)).await?;

• Include the most recent heartbeat_id in each request. Use an empty string for the first request.
• If you send an expired ID, the server responds with 400 and the correct ID. Update and retry.

---

Next Steps

Cancel single, multiple, or all open orders Attribute orders to your builder account for volume credit