fm-sdk 0.0.2

Python SDK for the Flexemarkets API

fm-sdk-python

Python SDK for the Flexemarkets API.

Requirements

• Python 3.11+

Install

python3.11 -m pip install .

Or install dependencies directly:

python3.11 -m pip install httpx websockets

Configuration

The SDK loads credentials and endpoint from these sources (highest priority first):

1. Arguments passed to Flexemarkets.connect()
2. Files ~/.fm/credential and ~/.fm/endpoint (Java .properties format)
3. Environment variable FM_API_URL (defaults to https://fm-data.herokuapp.com)

Credential file

Create ~/.fm/credential:

account=myaccount
email=[e-mail]
password=secret

Or use a bearer token:

token=eyJhbGciOiJIUzI1NiJ9...

Endpoint file

Create ~/.fm/endpoint:

endpoint=https://fm-data.herokuapp.com/api/marketplaces/123

SDK usage

from fm import Flexemarkets, OrderBooks, MarketplaceTrades

# Connect
fm = Flexemarkets.connect(
    credential="~/.fm/credential",
    endpoint="https://fm-data.herokuapp.com/api/marketplaces/123",
    client_description="my-bot",
)

# REST API
marketplace_id = fm.endpoint_marketplace_id
markets = fm.markets(marketplace_id)
session = fm.session(marketplace_id)
holdings = fm.holdings(marketplace_id)

# Submit orders
order = fm.submit_limit(marketplace_id, market_id, "BUY", units=1, price=950)
fm.submit_cancel(marketplace_id, market_id, order.id)

# WebSocket events
import queue

q = queue.Queue(maxsize=1000)
fm.listen(marketplace_id, q)

books = OrderBooks(markets)
trades = MarketplaceTrades(markets)

while True:
    event = q.get()
    match event:
        case list() as orders:
            books.update(orders)
            trades.update(orders)
        case Session() as s:
            print(s.state)
        case Holding() as h:
            print(h.cash)

fm.close()

The client also works as a context manager:

with Flexemarkets.connect(credential, endpoint, "my-bot") as fm:
    ...

Applications

ticker

Live terminal display of order book best bid/ask, spread, and recent trade prices.

python3.11 ticker.py -C ~/.fm/credential -E https://fm-data.herokuapp.com/api/marketplaces/123

Options:

Flag	Description
-C, --credential	Credential file path or bearer token
-E, --endpoint	Marketplace endpoint file path or URL

Output:

fm-ticker                                              OPEN

  Symbol     Bid     Ask  Spread   Last trades
  ------  ------  ------  ------   -----------
    AAPL  $ 9.50  $10.50  $ 1.00   $9.50  $10.00
     IBM  $ 4.00  $ 5.00  $ 1.00   $4.50

The display refreshes on each order book update. Press Ctrl-C to stop.