AI agents use spot_place_order to commit financial operations through Okx Trade — usually the final step of a payment, billing, or trading workflow. A call moves real money.
| Parameter | Type | Required | Description |
|---|---|---|---|
px | string | — | Required for limit/post_only/fok/ioc |
sz | string | Yes | Buy market: quote amount, all others: base amount |
side | string | Yes | |
instId | string | Yes | e.g. BTC-USDT |
tdMode | string | Yes | cash=regular spot, cross/isolated=margin |
tgtCcy | string | — | Size unit. base_ccy(default): sz in base (e.g. BTC), quote_ccy: sz in quote (e.g. USDT) |
clOrdId | string | — | Client order ID (max 32 chars) |
ordType | string | Yes | market(no px)|limit(px req)|post_only(maker)|fok(all-or-cancel)|ioc(partial fill) |
slOrdPx | string | — | SL order price, -1=market |
stpMode | string | — | Self-trade prevention: cancel_maker|cancel_taker|cancel_both |
tpOrdPx | string | — | TP order price, -1=market |
tpOrdKind | string | — | condition(default)=trigger-based TP; limit=immediate limit order (no trigger phase) |
Parameters from the server's own tool schema.
This tool directly places real spot trading orders on the OKX exchange, committing financial obligations and moving funds. It falls squarely in the Financial category with critical severity since misuse could result in significant unintended trades, financial losses, or market exposure.
From the tool's definition "Place a spot order" and "[CAUTION] Executes real trades"
Risk signalsHigh parameter count (16 properties)
Attacks that exploit this kind of access
Place a spot order. Attach TP/SL via tpTriggerPx/slTriggerPx. [CAUTION] Executes real trades. It is categorised as a Financial tool in the Okx Trade MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
spot_place_order accepts 12 parameters: px, sz, side, instId, tdMode, tgtCcy, clOrdId, ordType, slOrdPx, stpMode, tpOrdPx, tpOrdKind. Required: sz, side, instId, tdMode, ordType. The full parameter table on this page comes from the server's own tool schema.
Register the Okx Trade MCP server in PolicyLayer and add a rule for spot_place_order: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Okx Trade. Nothing to install.
spot_place_order is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the spot_place_order rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for spot_place_order. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
spot_place_order is provided by the Okx Trade MCP server (@okx_ai/okx-trade-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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