> For the complete documentation index, see [llms.txt](https://docs.hyperlink.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.hyperlink.xyz/api/exchange-methods/batchmodify.md).

# batchModify

## POST /exchange

> batchModify

```json
{"openapi":"3.1.0","info":{"title":"Hyperlink Exchange - batchModify","version":"1.0.0"},"tags":[{"name":"batchModify"}],"servers":[{"url":"https://api.hyperlink.xyz","description":"Mainnet"}],"paths":{"/exchange":{"post":{"tags":["batchModify"],"summary":"batchModify","operationId":"exchange_batchModify","requestBody":{"description":"Signed `batchModify` exchange request.","required":true,"content":{"application/json":{"schema":{"type":"object","description":"Request envelope for the `/exchange` endpoint.\n\nAll exchange requests must include:\n- `action`: The action to perform\n- `signature`: EIP-712 signature authorizing the action\n- `nonce`: Unix timestamp in milliseconds (must be within validity window)","required":["action","signature","nonce"],"properties":{"action":{"allOf":[{"$ref":"#/components/schemas/BatchModifyRequest","description":"Replace one or more existing orders"},{"type":"object","required":["type"],"properties":{"type":{"type":"string","enum":["batchModify"]}}}],"description":"Replace one or more existing orders"},"expiresAfter":{"type":["integer","null"],"format":"int64","description":"Optional expiry for L1-signed actions.","minimum":0},"nonce":{"type":"integer","format":"int64","description":"Request nonce (Unix timestamp in milliseconds)","minimum":0},"signature":{"$ref":"#/components/schemas/Signature","description":"EIP-712 signature authorizing this action"},"vaultAddress":{"type":["string","null"],"description":"Optional vault address for vault operations"}}}}}},"responses":{"200":{"description":"Request successful. Response format depends on the requested action.","content":{"application/json":{"schema":{}}}},"400":{"description":"Request body was not valid JSON","content":{"text/plain":{"schema":{"type":"string"}}}},"422":{"description":"JSON body did not match a supported exchange schema","content":{"text/plain":{"schema":{"type":"string"}}}},"500":{"description":"Internal server error","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ExchangeResponse"}}}}}}}},"components":{"schemas":{"BatchModifyRequest":{"type":"object","description":"Multi-order modify request.","required":["modifies"],"properties":{"a":{"type":["boolean","null"],"description":"Present only when true. Hyperlink rejects this mode."},"modifies":{"type":"array","items":{"$ref":"#/components/schemas/ModifyOrderRequest"},"description":"Order replacements submitted in one Hyperliquid action."}}},"ModifyOrderRequest":{"type":"object","description":"One order replacement within a modify action.","required":["oid","order"],"properties":{"oid":{"$ref":"#/components/schemas/OidOrCloid","description":"Existing Hyperliquid order ID or client order ID."},"order":{"$ref":"#/components/schemas/ModifyOrderWire","description":"Replacement order."}}},"OidOrCloid":{"oneOf":[{"type":"integer","format":"int64","minimum":0},{"type":"string"}],"description":"Hyperliquid order identifier used by modify actions."},"ModifyOrderWire":{"type":"object","description":"Replacement order encoded with Hyperliquid's canonical short keys.","required":["a","b","p","s","r","t"],"properties":{"a":{"type":"integer","format":"int32","description":"Asset index.","minimum":0},"b":{"type":"boolean","description":"True for buy, false for sell."},"c":{"type":["string","null"],"description":"Optional replacement client order ID."},"p":{"type":"string","description":"Limit price."},"r":{"type":"boolean","description":"Whether the replacement is reduce-only."},"s":{"type":"string","description":"Order size."},"t":{"$ref":"#/components/schemas/Order","description":"Replacement order type."}}},"Order":{"oneOf":[{"type":"object","description":"Standard limit order","required":["limit"],"properties":{"limit":{"$ref":"#/components/schemas/Limit","description":"Standard limit order"}}},{"type":"object","description":"Trigger/stop order","required":["trigger"],"properties":{"trigger":{"$ref":"#/components/schemas/Trigger","description":"Trigger/stop order"}}}],"description":"Order type: either a limit order or a trigger (stop) order."},"Limit":{"type":"object","description":"Limit order parameters.","required":["tif"],"properties":{"tif":{"type":"string","description":"Time in force: \"Ioc\" (immediate-or-cancel), \"Gtc\" (good-til-cancel), \"Alo\"\n(add-liquidity-only)"}}},"Trigger":{"type":"object","description":"Trigger order parameters (stop-loss / take-profit).","required":["isMarket","triggerPx","tpsl"],"properties":{"isMarket":{"type":"boolean","description":"If true, execute as market order when triggered"},"tpsl":{"type":"string","description":"Type: \"tp\" (take-profit) or \"sl\" (stop-loss)"},"triggerPx":{"type":"string","description":"Price at which to trigger the order"}}},"Signature":{"type":"object","description":"EIP-712 signature components.","required":["r","s","v"],"properties":{"r":{"type":"string","description":"r component (hex string with 0x prefix)"},"s":{"type":"string","description":"s component (hex string with 0x prefix)"},"v":{"type":"integer","format":"int32","description":"v component (27 or 28)","minimum":0}}},"ExchangeResponse":{"type":"object","description":"Exchange response envelope matching Hyperliquid's format exactly.\nUsed for order placement, cancellation, and other exchange actions.","required":["status","response"],"properties":{"response":{"$ref":"#/components/schemas/ExchangeResponseData","description":"Response payload"},"status":{"type":"string","description":"Status: \"ok\" or \"error\""}}},"ExchangeResponseData":{"type":"object","description":"Inner response object for exchange operations.","required":["type"],"properties":{"data":{"description":"Response data payload (omitted when null, e.g. for \"default\" responses)"},"type":{"type":"string","description":"Response type (e.g., \"order\", \"cancel\", \"default\", \"error\")"}}}}}}
```


---

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```
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