---
title: List External Keys
url: https://platform.claude.com/docs/en/api/csharp/organization/external_keys/list
---

# List External Keys

`ExternalKeyListPage Organization.ExternalKeys.List(parameters, cancellationToken = default)`

**GET** `/v1/organizations/external_keys`

List external key configs in the caller's organization.

Results are ordered by creation time (newest first). Use the
`next_page` cursor from the response to fetch subsequent pages.

## Parameters

- `ExternalKeyListParams parameters`

  - `long limit` (query parameter)

    Number of results per page.

    minimum: 1, maximum: 100

  - `string? page` (query parameter)

    Opaque cursor from a previous response's `next_page`.

## Returns

- `class ExternalKey`

  CMEK external key config belonging to the caller's organization.

  Configs are organization-scoped. Workspaces attach to a config; once any
  workspace references it, the provider fields become effectively immutable
  (existing encrypted data needs the config for decrypt).

  - `JsonElement Type = "external_key"`

  - `required string ID`

    Identifier of the external key config. A tagged ID prefixed `ekey_`, or — for organizations on the Claude Platform on AWS — the AWS KMS key ARN.

  - `required Attachment Attachment`

    Whether any workspace uses this config to encrypt its data — counting live and archived workspaces (an archived workspace's data remains encrypted under the config), excluding deleted ones. Only an attached config is used by the encryption path; an `unattached` config is inert and can be deleted.

    - `class ExternalKeyAttachedAttachment`

      - `JsonElement Type = "attached"`

    - `class ExternalKeyUnattachedAttachment`

      - `JsonElement Type = "unattached"`

  - `required DateTimeOffset CreatedAt`

    format: date-time

  - `required string? DisplayName`

    Human-friendly display name. Null if none was set.

  - `required string Geo`

    Data residency geo. Selects which regional validator handles this key's encrypt/decrypt roundtrips.

  - `required ProviderConfig ProviderConfig`

    KMS provider identity and auth coordinates.

    - `class AwsExternalKeyConfig`

      - `JsonElement Type = "aws"`

      - `required string KmsArn`

        Full ARN of the AWS KMS key. On Claude Platform on AWS the key must be a single-Region key in your organization's own AWS account; cross-account keys, multi-Region keys, and alias ARNs are rejected.

        maxLength: 2048

      - `string? Region`

        AWS region. Derived from `kms_arn` if omitted.

    - `class GcpExternalKeyConfig`

      - `JsonElement Type = "gcp"`

      - `required string KeyName`

        Full resource name of the Cloud KMS key.

    - `class AzureExternalKeyConfig`

      - `JsonElement Type = "azure"`

      - `required string KeyName`

        Name of the key within the vault.

      - `required string TenantID`

        Azure AD tenant ID.

      - `required string VaultUri`

        Key Vault data-plane URI — `https://{vault-name}.vault.azure.net` or `https://{hsm-name}.managedhsm.azure.net`.

      - `string? ClientID`

        Azure AD application (client) ID. Omit to use Anthropic's multitenant app. Provide only if using a single-tenant app registration in the customer's directory.

  - `required DateTimeOffset UpdatedAt`

    format: date-time

## Example

```csharp
using System;
using Anthropic.Models.Organization.ExternalKeys;

ExternalKeyListParams parameters = new();

var page = await client.Organization.ExternalKeys.List(parameters);
await foreach (var item in page.Paginate())
{
    Console.WriteLine(item);
}
```

### Response (200)

```json
{
  "data": [
    {
      "id": "ekey_01SDCCSbTxrXDpWc1phhtcfK",
      "attachment": {
        "type": "attached"
      },
      "created_at": "2024-10-30T23:58:27.427722Z",
      "display_name": "prod-us-key",
      "geo": "us",
      "provider_config": {
        "kms_arn": "arn:aws:kms:us-east-1:111122223333:key/abcd1234-5678-90ab-cdef-000011112222",
        "type": "aws",
        "region": "us-east-1",
        "role_arn": "arn:aws:iam::111122223333:role/anthropic-cmek"
      },
      "type": "external_key",
      "updated_at": "2024-10-30T23:58:27.427722Z"
    }
  ],
  "next_page": "next_page"
}
```