## List Environments

`EnvironmentListPage beta().environments().list(EnvironmentListParamsparams = EnvironmentListParams.none(), RequestOptionsrequestOptions = RequestOptions.none())`

**get** `/v1/environments`

List environments with pagination support.

### Parameters

- `EnvironmentListParams params`

  - `Optional<Boolean> includeArchived`

    Include archived environments in the response

  - `Optional<Long> limit`

    Maximum number of environments to return

  - `Optional<String> page`

    Opaque cursor from previous response for pagination. Pass the `next_page` value from the previous response.

  - `Optional<List<AnthropicBeta>> betas`

    Optional header to specify the beta version(s) you want to use.

    - `MESSAGE_BATCHES_2024_09_24("message-batches-2024-09-24")`

    - `PROMPT_CACHING_2024_07_31("prompt-caching-2024-07-31")`

    - `COMPUTER_USE_2024_10_22("computer-use-2024-10-22")`

    - `COMPUTER_USE_2025_01_24("computer-use-2025-01-24")`

    - `PDFS_2024_09_25("pdfs-2024-09-25")`

    - `TOKEN_COUNTING_2024_11_01("token-counting-2024-11-01")`

    - `TOKEN_EFFICIENT_TOOLS_2025_02_19("token-efficient-tools-2025-02-19")`

    - `OUTPUT_128K_2025_02_19("output-128k-2025-02-19")`

    - `FILES_API_2025_04_14("files-api-2025-04-14")`

    - `MCP_CLIENT_2025_04_04("mcp-client-2025-04-04")`

    - `MCP_CLIENT_2025_11_20("mcp-client-2025-11-20")`

    - `DEV_FULL_THINKING_2025_05_14("dev-full-thinking-2025-05-14")`

    - `INTERLEAVED_THINKING_2025_05_14("interleaved-thinking-2025-05-14")`

    - `CODE_EXECUTION_2025_05_22("code-execution-2025-05-22")`

    - `EXTENDED_CACHE_TTL_2025_04_11("extended-cache-ttl-2025-04-11")`

    - `CONTEXT_1M_2025_08_07("context-1m-2025-08-07")`

    - `CONTEXT_MANAGEMENT_2025_06_27("context-management-2025-06-27")`

    - `MODEL_CONTEXT_WINDOW_EXCEEDED_2025_08_26("model-context-window-exceeded-2025-08-26")`

    - `SKILLS_2025_10_02("skills-2025-10-02")`

    - `FAST_MODE_2026_02_01("fast-mode-2026-02-01")`

    - `OUTPUT_300K_2026_03_24("output-300k-2026-03-24")`

    - `USER_PROFILES_2026_03_24("user-profiles-2026-03-24")`

    - `ADVISOR_TOOL_2026_03_01("advisor-tool-2026-03-01")`

    - `MANAGED_AGENTS_2026_04_01("managed-agents-2026-04-01")`

    - `CACHE_DIAGNOSIS_2026_04_07("cache-diagnosis-2026-04-07")`

    - `THINKING_TOKEN_COUNT_2026_05_13("thinking-token-count-2026-05-13")`

    - `SERVER_SIDE_FALLBACK_2026_06_01("server-side-fallback-2026-06-01")`

    - `FALLBACK_CREDIT_2026_06_01("fallback-credit-2026-06-01")`

### Returns

- `class BetaEnvironment:`

  Unified Environment resource for both cloud and self-hosted environments.

  - `String id`

    Environment identifier (e.g., 'env_...')

  - `Optional<String> archivedAt`

    RFC 3339 timestamp when environment was archived, or null if not archived

  - `Config config`

    Environment configuration (either Anthropic Cloud or self-hosted)

    - `class BetaCloudConfig:`

      `cloud` environment configuration.

      - `Networking networking`

        Network configuration policy.

        - `class BetaUnrestrictedNetwork:`

          Unrestricted network access.

          - `JsonValue; type "unrestricted"constant`

            Network policy type

            - `UNRESTRICTED("unrestricted")`

        - `class BetaLimitedNetwork:`

          Limited network access.

          - `boolean allowMcpServers`

            Permits outbound access to MCP server endpoints configured on the agent, beyond those listed in the `allowed_hosts` array.

          - `boolean allowPackageManagers`

            Permits outbound access to public package registries (PyPI, npm, etc.) beyond those listed in the `allowed_hosts` array.

          - `List<String> allowedHosts`

            Specifies domains the container can reach.

          - `JsonValue; type "limited"constant`

            Network policy type

            - `LIMITED("limited")`

      - `BetaPackages packages`

        Package manager configuration.

        - `List<String> apt`

          Ubuntu/Debian packages to install

        - `List<String> cargo`

          Rust packages to install

        - `List<String> gem`

          Ruby packages to install

        - `List<String> go`

          Go packages to install

        - `List<String> npm`

          Node.js packages to install

        - `List<String> pip`

          Python packages to install

        - `Optional<Type> type`

          Package configuration type

          - `PACKAGES("packages")`

      - `JsonValue; type "cloud"constant`

        Environment type

        - `CLOUD("cloud")`

    - `class BetaSelfHostedConfig:`

      Configuration for self-hosted environments.

      - `JsonValue; type "self_hosted"constant`

        Environment type

        - `SELF_HOSTED("self_hosted")`

  - `String createdAt`

    RFC 3339 timestamp when environment was created

  - `String description`

    User-provided description for the environment

  - `Metadata metadata`

    User-provided metadata key-value pairs

  - `String name`

    Human-readable name for the environment

  - `JsonValue; type "environment"constant`

    The type of object (always 'environment')

    - `ENVIRONMENT("environment")`

  - `String updatedAt`

    RFC 3339 timestamp when environment was last updated

  - `Optional<Scope> scope`

    The visibility scope for this environment. 'organization' means visible to all accounts. 'account' means visible only to the owning account.

    - `ORGANIZATION("organization")`

    - `ACCOUNT("account")`

### Example

```java
package com.anthropic.example;

import com.anthropic.client.AnthropicClient;
import com.anthropic.client.okhttp.AnthropicOkHttpClient;
import com.anthropic.models.beta.environments.EnvironmentListPage;
import com.anthropic.models.beta.environments.EnvironmentListParams;

public final class Main {
    private Main() {}

    public static void main(String[] args) {
        AnthropicClient client = AnthropicOkHttpClient.fromEnv();

        EnvironmentListPage page = client.beta().environments().list();
    }
}
```

#### Response

```json
{
  "data": [
    {
      "id": "env_011CZkZ9X2dpNyB7HsEFoRfW",
      "archived_at": null,
      "config": {
        "networking": {
          "allow_mcp_servers": false,
          "allow_package_managers": true,
          "allowed_hosts": [
            "api.example.com"
          ],
          "type": "limited"
        },
        "packages": {
          "apt": [
            "string"
          ],
          "cargo": [
            "string"
          ],
          "gem": [
            "string"
          ],
          "go": [
            "string"
          ],
          "npm": [
            "string"
          ],
          "pip": [
            "pandas",
            "numpy"
          ],
          "type": "packages"
        },
        "type": "cloud"
      },
      "created_at": "2026-03-15T10:00:00Z",
      "description": "Python environment with data-analysis packages.",
      "metadata": {},
      "name": "python-data-analysis",
      "type": "environment",
      "updated_at": "2026-03-15T10:00:00Z",
      "scope": "organization"
    }
  ],
  "next_page": "page_MjAyNS0wNS0xNFQwMDowMDowMFo="
}
```
