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. GTC and FAK orders use price and size; FOK orders use maker_amount (with taker_amount always set to 1)
3. The SDK posts the order 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 server submits the signed order to the CLOB engine. GTC orders can rest on the book, FAK orders cancel unmatched remainder, and FOK orders either fully fill or cancel