Submit Order

Submit a pre-built order returned by buildOrder().

POST /api/{exchange}/submitOrder

Python

Polymarket

import pmxt

# Runs locally — never proxied through PMXT servers
exchange = pmxt.Polymarket(
    api_key="YOUR_API_KEY",
    api_secret="YOUR_API_SECRET",
    passphrase="YOUR_PASSPHRASE",
    private_key="YOUR_PRIVATE_KEY",
    proxy_address="YOUR_PROXY_ADDRESS",
    signature_type="gnosis-safe",
)
built = exchange.build_order(market_id="12345", side="buy", type="limit", amount=10, price=0.55)
result = exchange.submit_order(built)

200

{
  "success": true,
  "error": {
    "message": "<string>"
  },
  "data": {
    "id": "<string>",
    "marketId": "<string>",
    "outcomeId": "<string>",
    "amount": 123,
    "filled": 123,
    "remaining": 123,
    "timestamp": 123,
    "price": 123,
    "filledShares": 123,
    "fee": 123,
    "feeRateBps": 123
  }
}

Path Parameters

exchange · enum<string> · required

The prediction market exchange to target.

Available options: polymarket, kalshi, kalshi-demo, limitless, probable, baozi, myriad, opinion, metaculus, smarkets, polymarket_us, gemini-titan, hyperliquid, suibets, mock, router

Body

application/json

args · object[] · required

Required array length: 1 element

Show child attributes

credentials · object

Optional authentication credentials for exchange operations.

Show child attributes

Response

200 - application/json

Submit Order response

success · boolean

Example:

true

error · object

Show child attributes

data · object

Show child attributes