Delegated Orders

Place orders on behalf of sub-accounts with the Python SDK

The DelegatedOrderService enables partners with the delegated_signing scope to place and cancel orders on behalf of their sub-accounts. The server signs orders using the sub-account’s managed Privy wallet — no private key management is needed on the partner side.

Delegated signing requires a sub-account created with create_server_wallet=True. EOA sub-accounts sign their own orders.

Recommended setup: Store your HMAC credentials (token_id / secret) on your backend. Use this SDK server-side to sign partner-authenticated requests. Expose only your own app-specific endpoints to the frontend. Never expose HMAC secrets in browser bundles or client-side storage.

Access

from limitless_sdk import Client, HMACCredentials

client = Client(
    base_url="https://api.limitless.exchange",
    hmac_credentials=HMACCredentials(token_id=token_id, secret=secret),
)

# Use client.delegated_orders.*

Create a GTC delegated order

Builds an unsigned GTC (Good-Til-Cancelled) limit order and submits it to POST /orders with the on_behalf_of profile ID. The server signs the order via the sub-account’s managed wallet. GTC orders remain on the orderbook until filled or explicitly cancelled.

from limitless_sdk import OrderType, Side

response = await client.delegated_orders.create_order(
    token_id=market.tokens.yes,
    side=Side.BUY,
    order_type=OrderType.GTC,
    market_slug="btc-100k",
    on_behalf_of=partner_account.profile_id,
    price=0.55,
    size=10,
)

print(response.order.id)

Use post_only=True to ensure the order only rests on the book and is never filled immediately as a taker:

response = await client.delegated_orders.create_order(
    token_id=market.tokens.yes,
    side=Side.BUY,
    order_type=OrderType.GTC,
    market_slug="btc-100k",
    on_behalf_of=partner_account.profile_id,
    price=0.55,
    size=10,
    post_only=True,
)

Create a FAK delegated order

FAK (Fill-And-Kill) orders use the same price and size inputs as GTC, but they only consume immediately available liquidity and cancel any unmatched remainder.

post_only is not supported for FAK orders.

from limitless_sdk import OrderType, Side

response = await client.delegated_orders.create_order(
    token_id=market.tokens.yes,
    side=Side.BUY,
    order_type=OrderType.FAK,
    market_slug="btc-100k",
    on_behalf_of=partner_account.profile_id,
    price=0.45,
    size=10,
)

if response.maker_matches:
    print(f"FAK order matched immediately with {len(response.maker_matches)} fill(s)")
else:
    print("FAK remainder was cancelled.")

Create a FOK delegated order

FOK (Fill-Or-Kill) orders execute immediately at the best available price or are cancelled entirely — there are no partial fills. Instead of price and size, FOK orders use maker_amount:

• BUY: maker_amount is the USDC amount to spend (e.g., 50.0 = spend $50 USDC)
• SELL: maker_amount is the number of shares to sell (e.g., 18.64 = sell 18.64 shares)

from limitless_sdk import OrderType, Side

# BUY FOK — spend 1 USDC at market price
response = await client.delegated_orders.create_order(
    token_id=market.tokens.yes,
    side=Side.BUY,
    order_type=OrderType.FOK,
    market_slug="btc-100k",
    on_behalf_of=partner_account.profile_id,
    maker_amount=1.0,
)

if response.maker_matches:
    print(f"FOK order matched with {len(response.maker_matches)} fill(s)")
else:
    print("FOK order was not matched — cancelled automatically")

# SELL FOK — sell 10 shares at market price
response = await client.delegated_orders.create_order(
    token_id=market.tokens.yes,
    side=Side.SELL,
    order_type=OrderType.FOK,
    market_slug="btc-100k",
    on_behalf_of=partner_account.profile_id,
    maker_amount=10.0,
)

Parameters

GTC order parameters

Parameter	Type	Description
token_id	str	Position token ID (YES or NO) from market data
side	Side	Side.BUY or Side.SELL
order_type	OrderType	OrderType.GTC
market_slug	str	Market identifier
on_behalf_of	int	Profile ID of the sub-account
price	float	Price between 0 and 1
size	float	Number of contracts
post_only	bool	Optional. True rejects the order if it would immediately match. Default False.
fee_rate_bps	int	Fee rate in basis points (defaults to 300 if omitted)

FAK order parameters

Parameter	Type	Description
token_id	str	Position token ID (YES or NO) from market data
side	Side	Side.BUY or Side.SELL
order_type	OrderType	OrderType.FAK
market_slug	str	Market identifier
on_behalf_of	int	Profile ID of the sub-account
price	float	Price between 0 and 1
size	float	Number of contracts
fee_rate_bps	int	Fee rate in basis points (defaults to 300 if omitted)

FOK order parameters

Parameter	Type	Description
token_id	str	Position token ID (YES or NO) from market data
side	Side	Side.BUY or Side.SELL
order_type	OrderType	OrderType.FOK
market_slug	str	Market identifier
on_behalf_of	int	Profile ID of the sub-account
maker_amount	float	BUY: USDC to spend. SELL: shares to sell. Max 6 decimals.
fee_rate_bps	int	Fee rate in basis points (defaults to 300 if omitted)

Cancel an order

message = await client.delegated_orders.cancel(order_id)

Cancel on behalf of a sub-account

message = await client.delegated_orders.cancel_on_behalf_of(order_id, partner_account.profile_id)

Cancel all orders in a market

message = await client.delegated_orders.cancel_all(market_slug)

Cancel all on behalf of a sub-account

message = await client.delegated_orders.cancel_all_on_behalf_of(market_slug, partner_account.profile_id)

How it works

1. The SDK builds an unsigned order locally with a zero verifying address
2. For GTC and FAK orders, price and size are used; for FOK orders, maker_amount is used (with taker_amount always set to 1)
3. The order is posted to POST /orders with on_behalf_of and owner_id set to the sub-account’s profile ID
4. The server detects the delegated_signing scope and missing signature
5. The server looks up the sub-account’s server wallet, builds EIP-712 typed data, and signs via Privy
6. The signed order is submitted to the CLOB engine — GTC orders can rest on the book, FAK orders cancel unmatched remainder, and FOK orders either fully fill or cancel