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fm-sdk-python

Python SDK for the Flexemarkets API.

Requirements

  • Python 3.11+

Install

pip install fm-sdk

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://api.flexemarkets.com)

Credential file

Create ~/.fm/credential:

account=myaccount
email=user@example.com
password=secret

Or use a bearer token:

token=eyJhbGciOiJIUzI1NiJ9...

Endpoint file

Create ~/.fm/endpoint:

endpoint=https://api.flexemarkets.com/api/marketplaces/123

SDK usage

from fm import Flexemarkets

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

# REST API
marketplace_id = fm.endpoint_marketplace_id
markets = fm.markets(marketplace_id)
market_id = markets[0].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)

# Live market data: a desk keeps the books and tapes for you -- it seeds
# them over REST, applies deltas, and re-seeds after a sequence gap.
with fm.desk(marketplace_id) as desk:
    desk.on_book_change(market_id, lambda book: print(book.best_price("BUY")))
    desk.on_session_change(lambda session: print(session.state))
    desk.on_holding_change(lambda holding: print(holding.cash))

    one = desk.book(market_id)       # one market
    for book in desk.books():        # every market in the marketplace
        print(book.symbol, book.best_price("BUY"))

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 123

Options:

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

Metadata

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