---
title: "Cancel Order (V2)"
method: DELETE
path: "/portfolio/events/orders/{order_id}"
tags: ["orders"]
---

# Cancel Order (V2)

`DELETE /portfolio/events/orders/{order_id}`

Endpoint for cancelling event-market orders using the V2 response shape. Returns `{order_id, client_order_id, reduced_by}` rather than a full order object.

## Path parameters

- `order_id` string, required

## Query parameters

- `subaccount` integer
- `exchange_index` integer — Identifier for an exchange shard.
- `market_ticker` string

## Response `200`

Order cancelled successfully

- CancelOrderV2Response
  - `order_id` string, required
  - `client_order_id` string
  - `reduced_by` string, required — Fixed-point contract count string (2 decimals, e.g., "10.00"; referred to as "fp" in field names). Requests accept 0-2 decimal places (e.g., "10", "10.0", "10.00"); responses always emit 2 decimals. Fractional contract values (e.g., "2.50") are supported; the minimum granularity is 0.01 contracts.
  - `ts_ms` integer, required — Matching engine timestamp at which the cancellation was processed, as Unix epoch milliseconds.

## Other responses

- `401` — Unauthorized - authentication required
- `404` — Resource not found
- `500` — Internal server error

---

[API](https://skmtc.net/kalshi/apis/kalshi-trade-api-manual-endpoints.md) · [All operations](https://skmtc.net/kalshi/apis/kalshi-trade-api-manual-endpoints/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/kalshi/kalshi-trade-api-manual-endpoints/revisions/6aec27d55fba/schema)