# get_mark_price_kline

Get mark price candlestick data for derivatives trading. Mark price is used for liquidation calculations and PnL. Available for linear and inverse perpetual contracts only.

Agent View of the PolicyLayer registry record for `get_mark_price_kline`. HTML page: https://policylayer.com/tools/bcusack-bybit-py-mcp/get-mark-price-kline

## Facts

- Tool: `get_mark_price_kline`
- Server: Bybit MCP Server (`bcusack/bybit-py-mcp`) — https://policylayer.com/tools/bcusack-bybit-py-mcp.md
- Homepage: https://github.com/BCusack/bybit-py-mcp
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Allowed

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_mark_price_kline",
    "arguments": {}
  }
}
```

## Why get_mark_price_kline is rated Low

This is a read-only query function that retrieves historical mark price data used for analysis. It has no side effects, does not execute trades or commands, does not modify any data, and poses minimal risk even if misused by an AI agent—the worst outcome would be retrieving irrelevant historical data.

From the tool's own definition: "Tool retrieves candlestick data (get_mark_price_kline) without modifying state. The description explicitly indicates data retrieval: 'Get mark price candlestick data for derivatives trading' with no indication of write, execute, or destructive operations."

## Use case

AI agents call get_mark_price_kline to retrieve information from Bybit MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Bybit MCP Server:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_mark_price_kline": {}
  }
}
```

## Other tools on Bybit MCP Server (35)

- `batch_cancel_order` — Destructive — https://policylayer.com/tools/bcusack-bybit-py-mcp/batch-cancel-order.md
- `cancel_all_orders` — Destructive — https://policylayer.com/tools/bcusack-bybit-py-mcp/cancel-all-orders.md
- `cancel_order` — Destructive — https://policylayer.com/tools/bcusack-bybit-py-mcp/cancel-order.md
- `set_leverage` — Execute — https://policylayer.com/tools/bcusack-bybit-py-mcp/set-leverage.md
- `switch_cross_isolated_margin` — Execute — https://policylayer.com/tools/bcusack-bybit-py-mcp/switch-cross-isolated-margin.md
- `batch_amend_order` — Financial — https://policylayer.com/tools/bcusack-bybit-py-mcp/batch-amend-order.md
- `batch_place_order` — Financial — https://policylayer.com/tools/bcusack-bybit-py-mcp/batch-place-order.md
- `place_order` — Financial — https://policylayer.com/tools/bcusack-bybit-py-mcp/place-order.md
- `place_trigger_order` — Financial — https://policylayer.com/tools/bcusack-bybit-py-mcp/place-trigger-order.md
- `set_trading_stop` — Financial — https://policylayer.com/tools/bcusack-bybit-py-mcp/set-trading-stop.md
- `get_account_info` — Read — https://policylayer.com/tools/bcusack-bybit-py-mcp/get-account-info.md
- `get_closed_pnl` — Read — https://policylayer.com/tools/bcusack-bybit-py-mcp/get-closed-pnl.md
- `get_funding_rate_history` — Read — https://policylayer.com/tools/bcusack-bybit-py-mcp/get-funding-rate-history.md
- `get_index_price_kline` — Read — https://policylayer.com/tools/bcusack-bybit-py-mcp/get-index-price-kline.md
- `get_instruments_info` — Read — https://policylayer.com/tools/bcusack-bybit-py-mcp/get-instruments-info.md
- `get_insurance` — Read — https://policylayer.com/tools/bcusack-bybit-py-mcp/get-insurance.md
- `get_kline` — Read — https://policylayer.com/tools/bcusack-bybit-py-mcp/get-kline.md
- `get_long_short_ratio` — Read — https://policylayer.com/tools/bcusack-bybit-py-mcp/get-long-short-ratio.md
- `get_open_closed_orders` — Read — https://policylayer.com/tools/bcusack-bybit-py-mcp/get-open-closed-orders.md
- `get_open_interest` — Read — https://policylayer.com/tools/bcusack-bybit-py-mcp/get-open-interest.md
- `get_order_book` — Read — https://policylayer.com/tools/bcusack-bybit-py-mcp/get-order-book.md
- `get_order_history` — Read — https://policylayer.com/tools/bcusack-bybit-py-mcp/get-order-history.md
- `get_position_info` — Read — https://policylayer.com/tools/bcusack-bybit-py-mcp/get-position-info.md
- `get_premium_index_price_kline` — Read — https://policylayer.com/tools/bcusack-bybit-py-mcp/get-premium-index-price-kline.md
- `get_recent_trades` — Read — https://policylayer.com/tools/bcusack-bybit-py-mcp/get-recent-trades.md
- `get_risk_limit` — Read — https://policylayer.com/tools/bcusack-bybit-py-mcp/get-risk-limit.md
- `get_server_time` — Read — https://policylayer.com/tools/bcusack-bybit-py-mcp/get-server-time.md
- `get_single_coin_balance` — Read — https://policylayer.com/tools/bcusack-bybit-py-mcp/get-single-coin-balance.md
- `get_tickers` — Read — https://policylayer.com/tools/bcusack-bybit-py-mcp/get-tickers.md
- `get_trade_history` — Read — https://policylayer.com/tools/bcusack-bybit-py-mcp/get-trade-history.md
- …and 5 more: https://policylayer.com/tools/bcusack-bybit-py-mcp.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=bcusack-bybit-py-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/bcusack-bybit-py-mcp