Patch Market

Description

Update trading parameters (fees, tick size, lot size, minimum notional) for an existing spot market. Omitted fields are left unchanged — only the fields present in the body are updated.

Admin only. Requires the ADMIN_API_KEY environment variable to be set on the server and passed as X-API-Key in the request header.

Note on resting orders: Existing resting orders are NOT re-validated against the new tick_size or lot_size after this call. They remain on the book until filled or canceled. New orders placed after the update must satisfy the new parameters.

HTTP Request

PATCH /admin/spot/markets/:id (X-API-Key: ADMIN_API_KEY)

:id is the market identifier (e.g. DFUSDT). Case-sensitive.

Weight

0 — admin endpoints have no weight limit. Each market mutation pings the engine with a ReloadMarket command so the in-memory MarketCache picks up the change without restart.

Request Parameters

Name	Type	Required	Description
tick_size	DECIMAL	NO	New minimum price increment as a string (e.g. "0.0001"). Omit to leave unchanged.
lot_size	DECIMAL	NO	New minimum quantity increment as a string (e.g. "0.01"). Omit to leave unchanged.
min_notional	DECIMAL	NO	New minimum notional value as a string (e.g. "1"). Omit to leave unchanged.
maker_fee_bps	NUMBER	NO	New maker fee in basis points (integer). Omit to leave unchanged.
taker_fee_bps	NUMBER	NO	New taker fee in basis points (integer). Omit to leave unchanged.

At least one field should be present; sending an empty body is a no-op (succeeds, no parameters change).

Response Example

200 OK

{
  "ok": true,
  "id": "DFUSDT"
}

Field	Notes
ok	Always true on success.
id	The market id that was updated, echoed back.

Error Responses

HTTP	error	When
500	DB_ERROR	Unexpected Postgres error during the update. Investigate server logs.

Full list: Error Codes.

Code Examples

cURL

ADMIN_API_KEY="your_admin_api_key"
MARKET_ID="DFUSDT"

curl -s -X PATCH "https://api-sepolia.p99.world/api/v1/admin/spot/markets/${MARKET_ID}" \
  -H "X-API-Key: ${ADMIN_API_KEY}" \
  -H "Content-Type: application/json" \
  -d '{
    "tick_size":     "0.0001",
    "maker_fee_bps": 5,
    "taker_fee_bps": 10
  }'

Python

import requests

ADMIN_API_KEY = "your_admin_api_key"
BASE_URL      = "https://api-sepolia.p99.world/api/v1"

def admin_patch(path: str, body: dict) -> dict:
    r = requests.patch(
        f"{BASE_URL}{path}",
        json=body,
        headers={"X-API-Key": ADMIN_API_KEY, "Content-Type": "application/json"},
        timeout=5,
    )
    r.raise_for_status()
    return r.json()

result = admin_patch("/admin/spot/markets/DFUSDT", {
    "tick_size":     "0.0001",
    "maker_fee_bps": 5,
    "taker_fee_bps": 10,
})
print(result["ok"], result["id"])