# February 17, 2026 

** February 17, 2026 Karbon API release introduces the ability to return Karbon for Clients access details for Contacts **
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## API Changes

### Retrieve Client Access Details for a Contact

You can now retrieve a list of clients a Contact has access to in Karbon for Clients along with the access level that has been granted.

Note that ClientAccess is a read-only property and access to Karbon for Clients cannot be created or removed via the API.

To use this feature, include the querystring parameter `$expand=ClientAccess` in your `GET` request to the `/v3/Contacts/{ContactKey}` endpoint. This will return an array of associated clients this contact has access to in Karbon for Clients.

For example, a request to `/v3/Contacts/X2C4ffW1Fqv?$expand=ClientAccess` will include the following `ClientAccess` array in the response:

```json
"ClientAccess": [
    {
        "ClientKey": "26L7dsVZ5DzR",
        "ClientType": "Contact",
        "AccessLevel": "Limited"
    },
    {
        "ClientKey": "4FVM9lWhb4mp",
        "ClientType": "Organization",
        "AccessLevel": "FullAccess"
    }
]
```

Based on this response, you can see that the contact `X2C4ffW1Fqv` has access to two clients in Karbon for Clients. They have limited access the person `26L7dsVZ5DzR` and full access the orgnization `4FVM9lWhb4mp`.

The `AccessLevel` property will be either `Limited` or `FullAccess`, corresponding to the access level set for that contact in Karbon.