# HubSpot CRM Public App Feature Flags V3 API

> HubSpot CRM Public App Feature Flags V3 API on Apizie: 10 endpoints (List Flags, Retrieve an app's feature flags, Set an app's feature flag, Delete an app's feature flag, …) returned as clean JSON through one API key. Send your own provider key in the x-upstream-key header. Call it over REST at https://apizie.tech/v1/business:hubspot-crm-public-app-feature-flags-v3/{endpoint} or from Claude, ChatGPT and Cursor through the Apizie MCP server. Free plan: 1,000 requests a month.

- Project key: `business:hubspot-crm-public-app-feature-flags-v3`
- Category: Business
- Status: byok
- Source: https://developers.hubspot.com/docs/api/overview
- Page: https://apizie.tech/api/business/hubspot-crm-public-app-feature-flags-v3
- OpenAPI: https://apizie.tech/api/business/hubspot-crm-public-app-feature-flags-v3/openapi.json

Basepom for all HubSpot Projects

## Endpoints

### List Flags
`GET https://apizie.tech/v1/business:hubspot-crm-public-app-feature-flags-v3/get-feature-flags-2026-09-app-id-flags-all-feature-flags-v3` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| appId | integer | yes | The unique identifier of the application for which to retrieve all feature flags. |

### Retrieve an app's feature flags
`GET https://apizie.tech/v1/business:hubspot-crm-public-app-feature-flags-v3/get-feature-flags-2026-09-app-id-flags-flag-name` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| appId | integer | yes | The unique identifier of the app associated with the feature flag. |
| flagName | string | yes | The name of the feature flag to retrieve. |

### Set an app's feature flag
`POST https://apizie.tech/v1/business:hubspot-crm-public-app-feature-flags-v3/put-feature-flags-2026-09-app-id-flags-flag-name` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| appId | integer | yes | The unique identifier of the application associated with the feature flag. |
| flagName | string | yes | The name of the feature flag to update. |
| body | object | yes | JSON request body |

### Delete an app's feature flag
`POST https://apizie.tech/v1/business:hubspot-crm-public-app-feature-flags-v3/delete-feature-flags-2026-09-app-id-flags-flag-name` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| appId | integer | yes | The unique identifier of the application from which the feature flag will be deleted. |
| flagName | string | yes | The name of the feature flag to be deleted. |

### Retrieve accounts with a set flag state
`GET https://apizie.tech/v1/business:hubspot-crm-public-app-feature-flags-v3/get-feature-flags-2026-09-app-id-flags-flag-name-portals` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| appId | integer | yes | The unique identifier of the app associated with the feature flag. |
| flagName | string | yes | The name of the feature flag to retrieve portal information for. |
| limit | integer | no | The maximum number of results to display per page. |
| startPortalId | integer | no | The ID of the portal to start the list from. Useful for pagination. |

### Batch delete account flag state
`POST https://apizie.tech/v1/business:hubspot-crm-public-app-feature-flags-v3/post-feature-flags-2026-09-app-id-flags-flag-name-portals-ba` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| appId | integer | yes | The unique identifier of the application associated with the feature flag. |
| flagName | string | yes | The name of the feature flag to be deleted. |
| body | object | yes | JSON request body |

### Batch set account flag state
`POST https://apizie.tech/v1/business:hubspot-crm-public-app-feature-flags-v3/post-feature-flags-2026-09-app-id-flags-flag-name-portals-ba-2` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| appId | integer | yes | The unique identifier of the app for which the feature flags are being managed. |
| flagName | string | yes | The name of the feature flag to upsert. |
| body | object | yes | JSON request body |

### Retrieve account flag state
`GET https://apizie.tech/v1/business:hubspot-crm-public-app-feature-flags-v3/get-feature-flags-2026-09-app-id-flags-flag-name-portals-por` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| appId | integer | yes | The unique identifier of the app containing the feature flag. |
| flagName | string | yes | The name of the feature flag to retrieve. |
| portalId | integer | yes | The unique identifier of the portal for which the flag state is being retrieved. |

### Set an account flag state
`POST https://apizie.tech/v1/business:hubspot-crm-public-app-feature-flags-v3/put-feature-flags-2026-09-app-id-flags-flag-name-portals-por` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| appId | integer | yes | The unique identifier of the application associated with the feature flag. |
| flagName | string | yes | The name of the feature flag to update. |
| portalId | integer | yes | The unique identifier of the portal where the feature flag state is being updated. |
| body | object | yes | JSON request body |

### Delete an account flag state
`POST https://apizie.tech/v1/business:hubspot-crm-public-app-feature-flags-v3/delete-feature-flags-2026-09-app-id-flags-flag-name-portals` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| appId | integer | yes | The unique identifier of the app associated with the feature flag. |
| flagName | string | yes | The name of the feature flag to delete. |
| portalId | integer | yes | The unique identifier of the portal from which the feature flag will be deleted. |

## Example
```
curl "https://apizie.tech/v1/business:hubspot-crm-public-app-feature-flags-v3/get-feature-flags-2026-09-app-id-flags-all-feature-flags-v3" \
  -H "x-api-key: $APIZIE_KEY" \
  -H "x-upstream-key: $PROVIDER_KEY"
```

## FAQ

### How do I call the HubSpot CRM Public App Feature Flags V3 API?
Create a free Apizie key, then send GET https://apizie.tech/v1/business:hubspot-crm-public-app-feature-flags-v3/get-feature-flags-2026-09-app-id-flags-all-feature-flags-v3 with the header x-api-key. Every endpoint returns { project, data, timestamp }.

### Is the HubSpot CRM Public App Feature Flags V3 API free on Apizie?
Yes. The Free plan includes 1,000 requests a month at 100 requests a minute, no credit card. HubSpot CRM Public App Feature Flags V3 itself also needs your own key from hubapi.com.

### Can AI agents use the HubSpot CRM Public App Feature Flags V3 API?
Yes. Add the Apizie MCP server (https://apizie.tech/mcp) to Claude, ChatGPT, Cursor or VS Code, then ask in plain language. The agent calls run_scraper with project key business:hubspot-crm-public-app-feature-flags-v3.

### What is the status of the HubSpot CRM Public App Feature Flags V3 API?
Needs your own provider key (bring your own key)