# preCheckOrder

Validate an order before placing it to check margin requirements.\n\n- Futures and options only (linear, option categories)\n- Returns pre/post margin rates (IMR and MMR) in E4 format\n- Request parameters are the same as Create Order\n- Useful for checking if an order would be rejected due to insufficient margin\n- Does not actually place the order\n\nAgent hint: Use this endpoint to validate margin requirements before placing an order. Does not actually create an order. Only works for futures and options.\nTradFi: use to pre-validate margin for equity perpetuals and commodity perpetuals (category=linear) before placing.

Agent View of the PolicyLayer registry record for `preCheckOrder`. HTML page: https://policylayer.com/tools/bybit-exchange-trading-mcp/precheckorder

## Facts

- Tool: `preCheckOrder`
- Server: Bybit MCP Server (`bybit-exchange/trading-mcp`) — https://policylayer.com/tools/bybit-exchange-trading-mcp.md
- Homepage: https://github.com/bybit-exchange/trading-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": "preCheckOrder",
    "arguments": {}
  }
}
```

## Why preCheckOrder is rated Low

This is a query/validation tool that retrieves pre-trade margin calculations without side effects. It reads account and order data to compute hypothetical margin requirements but does not execute, write, or commit any financial transaction. The tool is designed specifically as a pre-flight check, making it a Read operation.

From the tool's own definition: "Tool description explicitly states 'Validate an order before placing it' and 'Does not actually place the order'. It returns margin rates (IMR and MMR) without creating, modifying, or executing any real trade."

## Use case

AI agents call preCheckOrder 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": {
    "preCheckOrder": {}
  }
}
```

## Other tools on Bybit MCP Server (379)

- `batchCancelOrders` — Destructive — https://policylayer.com/tools/bybit-exchange-trading-mcp/batchcancelorders.md
- `cancelAllOrders` — Destructive — https://policylayer.com/tools/bybit-exchange-trading-mcp/cancelallorders.md
- `cancelAllQuotes` — Destructive — https://policylayer.com/tools/bybit-exchange-trading-mcp/cancelallquotes.md
- `cancelAllRfqs` — Destructive — https://policylayer.com/tools/bybit-exchange-trading-mcp/cancelallrfqs.md
- `cancelAllSpreadOrders` — Destructive — https://policylayer.com/tools/bybit-exchange-trading-mcp/cancelallspreadorders.md
- `cancelOrder` — Destructive — https://policylayer.com/tools/bybit-exchange-trading-mcp/cancelorder.md
- `cancelRfq` — Destructive — https://policylayer.com/tools/bybit-exchange-trading-mcp/cancelrfq.md
- `cancelSpreadOrder` — Destructive — https://policylayer.com/tools/bybit-exchange-trading-mcp/cancelspreadorder.md
- `closeComboBot` — Destructive — https://policylayer.com/tools/bybit-exchange-trading-mcp/closecombobot.md
- `closeFGridBot` — Destructive — https://policylayer.com/tools/bybit-exchange-trading-mcp/closefgridbot.md
- `closeFMartBot` — Destructive — https://policylayer.com/tools/bybit-exchange-trading-mcp/closefmartbot.md
- `removeAd` — Destructive — https://policylayer.com/tools/bybit-exchange-trading-mcp/removead.md
- `upgradeToUta` — Destructive — https://policylayer.com/tools/bybit-exchange-trading-mcp/upgradetouta.md
- `wsBatchCancelOrders` — Destructive — https://policylayer.com/tools/bybit-exchange-trading-mcp/wsbatchcancelorders.md
- `wsCancelOrder` — Destructive — https://policylayer.com/tools/bybit-exchange-trading-mcp/wscancelorder.md
- `acceptNonLpQuote` — Execute — https://policylayer.com/tools/bybit-exchange-trading-mcp/acceptnonlpquote.md
- `closeGridBot` — Execute — https://policylayer.com/tools/bybit-exchange-trading-mcp/closegridbot.md
- `confirmNewRiskLimit` — Execute — https://policylayer.com/tools/bybit-exchange-trading-mcp/confirmnewrisklimit.md
- `createComboBot` — Execute — https://policylayer.com/tools/bybit-exchange-trading-mcp/createcombobot.md
- `createTwapStrategy` — Execute — https://policylayer.com/tools/bybit-exchange-trading-mcp/createtwapstrategy.md
- `movePosition` — Execute — https://policylayer.com/tools/bybit-exchange-trading-mcp/moveposition.md
- `resetMmp` — Execute — https://policylayer.com/tools/bybit-exchange-trading-mcp/resetmmp.md
- `setTradingStop` — Execute — https://policylayer.com/tools/bybit-exchange-trading-mcp/settradingstop.md
- `stopStrategy` — Execute — https://policylayer.com/tools/bybit-exchange-trading-mcp/stopstrategy.md
- `stopSubscription` — Execute — https://policylayer.com/tools/bybit-exchange-trading-mcp/stopsubscription.md
- `wsAmendOrder` — Execute — https://policylayer.com/tools/bybit-exchange-trading-mcp/wsamendorder.md
- `wsBatchAmendOrders` — Execute — https://policylayer.com/tools/bybit-exchange-trading-mcp/wsbatchamendorders.md
- `accountBorrow` — Financial — https://policylayer.com/tools/bybit-exchange-trading-mcp/accountborrow.md
- `accountFixedBorrow` — Financial — https://policylayer.com/tools/bybit-exchange-trading-mcp/accountfixedborrow.md
- `accountNoConvertRepay` — Financial — https://policylayer.com/tools/bybit-exchange-trading-mcp/accountnoconvertrepay.md
- …and 349 more: https://policylayer.com/tools/bybit-exchange-trading-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=bybit-exchange-trading-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/bybit-exchange-trading-mcp