Trade & read the Polymarket API with Python & TypeScript
Fetch markets, place orders, and stream prices on Polymarket — three lines to connect, zero auth boilerplate.
import pmxt
# Hosted trading — PMXT custodies a PreFundedEscrow you fund once
client = pmxt.Polymarket(
pmxt_api_key="pmxt_live_...",
wallet_address="0xYourWallet",
private_key="0xYourKey",
)
# Fetch live market data
events = client.fetch_events(query="Presidential Election")
market = events[0].markets[0]
print(market.title) # "Will a Republican win the 2028..."
print(market.yes.price) # 0.53
# Place a trade through PMXT's PreFundedEscrow
order = client.create_order(
market_id=market.id,
outcome_id=market.yes.id,
side="buy",
type="market",
amount=10, # $10 USDC
denom="usdc",
slippage_pct=30.0,
)
print(order.status) # "filled"Without pmxt
8 steps before you get data
Polymarket splits its API across three services, each with its own auth model. Every request requires key management, signature construction, and header assembly.
- 1Load Ethereum private key
- 2Build EIP-712 typed data struct
- 3Sign with ethers / web3.py
- 4Construct CLOB auth headers
- 5Manage nonces & timestamps
- 6Route to Gamma vs CLOB vs Data API
- 7Normalize three response formats
- 8Handle rate limits & retries
With pmxt: one key, hosted custody, every venue.
client = pmxt.Polymarket(pmxt_api_key=..., wallet_address=..., private_key=...)
client.create_order(market_id=..., outcome_id=..., side="buy", ...)Get your API key at pmxt.dev/dashboard.
Why pmxt
One SDK.
Every prediction market.
Multi-exchange
Switch from Polymarket to Kalshi by changing one line. Same methods, same types, different exchange.
Type-safe
Full type definitions in TypeScript. Pydantic models in Python. Catch errors before runtime.
Streaming
Subscribe to price changes and orderbook updates via WebSocket with a single method call.
Open source
MIT licensed. Read the code, fork it, contribute. No black boxes.
Same fetch_events() across every exchange
FAQ
Start building with Polymarket
Fetch data and place your first trade in under a minute.