---
title: "Set an app's feature flag"
method: PUT
path: "/feature-flags/2026-03/{appId}/flags/{flagName}"
tags: ["Basic"]
---

# Set an app's feature flag

`PUT /feature-flags/2026-03/{appId}/flags/{flagName}`

Set a feature flag for an app. For example, update the `hs-hide-crm-cards` flag's `defaultState` to `ON` to hide classic CRM cards from new installs.

## Path parameters

- `appId` integer, required
- `flagName` string, required

## Request body

- CrmFeatureFlagsFlagPutRequest
  - `defaultState` 'ABSENT' | 'OFF' | 'ON', required — The state that the flag should have if there are no overrides for a particular portal
  - `overrideState` 'ABSENT' | 'OFF' | 'ON' — A flag value that supercedes all other overrides, including portal-level values. Mostly used for things like emergency overrides

## Response `200`

successful operation

- CrmFeatureFlagsFlagResponse
  - `appId` integer, required — The ID of the app
  - `defaultState` 'ABSENT' | 'OFF' | 'ON', required — The flag state for any portal that doesn't have an override value
  - `flagName` string, required — The name of the flag
  - `overrideState` 'ABSENT' | 'OFF' | 'ON' — An optional flag value that overrides all others for this flag name and app, including portal-level values

## Other responses

- `default` — An error occurred.

---

[API](https://skmtc.net/hubspot/apis/hubspot-api-specification.md) · [All operations](https://skmtc.net/hubspot/apis/hubspot-api-specification/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/hubspot/hubspot-api-specification/versions/f9c7181056c5/schema)