Fee Tiers

01 Exchange uses a volume-based fee tier system. Maker and taker rates decrease as your 30-day rolling volume increases. Fees are also returned per-trade in GET /trades.

Fee Schedule

Tier	30-Day Volume	Taker	Maker
1	≤ $5M	0.035%	0.010%
2	> $5M	0.030%	0.005%
3	> $25M	0.025%	0%
4	> $100M	0.023%	0%
5	> $1B	0.020%	0%

[!NOTE] Fee rates are stored internally as parts-per-million (ppm). Divide by 10000 to get a percentage: 350 ppm → 0.035%.

GET /fee/brackets/info

Returns the full fee bracket table, including any discounted tiers.


curl https://zo-mainnet.n1.xyz/fee/brackets/info

Response

An array of [tier_index, { maker_fee_ppm, taker_fee_ppm }] tuples. Indices 0–4 are the standard tiers; indices 5–9 are discounted variants.


[
  [0, { "maker_fee_ppm": 100, "taker_fee_ppm": 350 }],
  [1, { "maker_fee_ppm": 50,  "taker_fee_ppm": 300 }],
  [2, { "maker_fee_ppm": 0,   "taker_fee_ppm": 250 }],
  [3, { "maker_fee_ppm": 0,   "taker_fee_ppm": 230 }],
  [4, { "maker_fee_ppm": 0,   "taker_fee_ppm": 200 }]
]


import requests
 
data = requests.get("https://zo-mainnet.n1.xyz/fee/brackets/info").json()
 
for tier_index, rates in data:
    taker_pct = rates["taker_fee_ppm"] / 10000
    maker_pct = rates["maker_fee_ppm"] / 10000
    print(f"Tier {tier_index + 1}: taker={taker_pct:.4f}%  maker={maker_pct:.4f}%")

GET /account/{id}/fee/tier

Returns the current fee tier index for an account, based on its 30-day rolling volume.


curl https://zo-mainnet.n1.xyz/account/12345/fee/tier

Response

A single integer: the zero-based tier index. Indices 0–4 map to standard Tiers 1–5; indices 5–9 map to discounted Tiers 1–5.


import requests
 
account_id = 12345
tier_index = requests.get(f"https://zo-mainnet.n1.xyz/account/{account_id}/fee/tier").json()
 
is_discounted = tier_index >= 5
display_tier = (tier_index - 5 + 1) if is_discounted else (tier_index + 1)
print(f"Account is on Tier {display_tier}" + (" (discounted)" if is_discounted else ""))

GET /market/{marketId}/fees/taker/{accountId}

Returns the effective taker fee rate for a specific account on a specific market.


curl https://zo-mainnet.n1.xyz/market/0/fees/taker/12345

Response

A decimal representing the fee rate (not a percentage). Multiply by 100 to get a percentage.


0.00035

GET /market/{marketId}/fees/maker/{accountId}

Returns the effective maker fee rate for a specific account on a specific market.


curl https://zo-mainnet.n1.xyz/market/0/fees/maker/12345

Response


0.0001

Example: Fetching Your Rates


import requests
 
NORD_URL = "https://zo-mainnet.n1.xyz"
market_id = 0
account_id = 12345
 
taker = requests.get(f"{NORD_URL}/market/{market_id}/fees/taker/{account_id}").json()
maker = requests.get(f"{NORD_URL}/market/{market_id}/fees/maker/{account_id}").json()
 
print(f"Taker: {taker * 100:.4f}%")
print(f"Maker: {maker * 100:.4f}%")
 
# Estimate fee on a $10,000 order
order_value = 10_000
print(f"Estimated taker fee: ${order_value * taker:.4f}")