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POST
/
api
/
{exchange}
/
submitOrder
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)
{
  "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,
opinion,
smarkets,
polymarket_us

Body

application/json
​
args
object[]
required
Required array length: 1 element
​
credentials
object

Optional authentication credentials for exchange operations.

Response

200 - application/json

Submit Order response

​
success
boolean
Example:

true

​
error
object
​
data
object