Create Environment

post /v1/environments

Create a new environment with the specified configuration.

Header Parameters

• "anthropic-beta": optional array of AnthropicBeta

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

  • string

  • "message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 22 more

    • "message-batches-2024-09-24"

    • "prompt-caching-2024-07-31"

    • "computer-use-2024-10-22"

    • "computer-use-2025-01-24"

    • "pdfs-2024-09-25"

    • "token-counting-2024-11-01"

    • "token-efficient-tools-2025-02-19"

    • "output-128k-2025-02-19"

    • "files-api-2025-04-14"

    • "mcp-client-2025-04-04"

    • "mcp-client-2025-11-20"

    • "dev-full-thinking-2025-05-14"

    • "interleaved-thinking-2025-05-14"

    • "code-execution-2025-05-22"

    • "extended-cache-ttl-2025-04-11"

    • "context-1m-2025-08-07"

    • "context-management-2025-06-27"

    • "model-context-window-exceeded-2025-08-26"

    • "skills-2025-10-02"

    • "fast-mode-2026-02-01"

    • "output-300k-2026-03-24"

    • "user-profiles-2026-03-24"

    • "advisor-tool-2026-03-01"

    • "managed-agents-2026-04-01"

    • "cache-diagnosis-2026-04-07"

Body Parameters

• name: string

  Human-readable name for the environment

• config: optional BetaCloudConfigParams or BetaSelfHostedConfigParams

  Environment configuration

  • BetaCloudConfigParams object { type, networking, packages }

    Request params for cloud environment configuration.

    Fields default to null; on update, omitted fields preserve the existing value.

    • type: "cloud"

      Environment type

      • "cloud"

    • networking: optional BetaUnrestrictedNetwork or BetaLimitedNetworkParams

      Network configuration policy. Omit on update to preserve the existing value.

      • BetaUnrestrictedNetwork object { type }

        Unrestricted network access.

        • type: "unrestricted"

          Network policy type

          • "unrestricted"

      • BetaLimitedNetworkParams object { type, allow_mcp_servers, allow_package_managers, allowed_hosts }

        Limited network request params.

        Fields default to null; on update, omitted fields preserve the existing value.

        • type: "limited"

          Network policy type

          • "limited"

        • allow_mcp_servers: optional boolean

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

        • allow_package_managers: optional boolean

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

        • allowed_hosts: optional array of string

          Specifies domains the container can reach.

    • packages: optional BetaPackagesParams

      Specify packages (and optionally their versions) available in this environment.

      When versioning, use the version semantics relevant for the package manager, e.g. for pip use package==1.0.0. You are responsible for validating the package and version exist. Unversioned installs the latest.

      • apt: optional array of string

        Ubuntu/Debian packages to install

      • cargo: optional array of string

        Rust packages to install

      • gem: optional array of string

        Ruby packages to install

      • go: optional array of string

        Go packages to install

      • npm: optional array of string

        Node.js packages to install

      • pip: optional array of string

        Python packages to install

      • type: optional "packages"

        Package configuration type

        • "packages"

  • BetaSelfHostedConfigParams object { type }

    Request params for self_hosted environment configuration.

    • type: "self_hosted"

      Environment type

      • "self_hosted"

• description: optional string

  Optional description of the environment

• metadata: optional map[string]

  User-provided metadata key-value pairs

• scope: optional "organization" or "account"

  The visibility scope for this environment. 'organization' makes the environment visible to all accounts. 'account' restricts visibility to the owning account only. Only applicable for self-hosted environments. If not specified, defaults based on organization type.

  • "organization"

  • "account"

Returns

• BetaEnvironment object { id, archived_at, config, 7 more }

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

  • id: string

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

  • archived_at: string

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

  • config: BetaCloudConfig or BetaSelfHostedConfig

    Environment configuration (either Anthropic Cloud or self-hosted)

    • BetaCloudConfig object { networking, packages, type }

      cloud environment configuration.

      • networking: BetaUnrestrictedNetwork or BetaLimitedNetwork

        Network configuration policy.

        • BetaUnrestrictedNetwork object { type }

          Unrestricted network access.

          • type: "unrestricted"

            Network policy type

            • "unrestricted"

        • BetaLimitedNetwork object { allow_mcp_servers, allow_package_managers, allowed_hosts, type }

          Limited network access.

          • allow_mcp_servers: boolean

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

          • allow_package_managers: boolean

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

          • allowed_hosts: array of string

            Specifies domains the container can reach.

          • type: "limited"

            Network policy type

            • "limited"

      • packages: BetaPackages

        Package manager configuration.

        • apt: array of string

          Ubuntu/Debian packages to install

        • cargo: array of string

          Rust packages to install

        • gem: array of string

          Ruby packages to install

        • go: array of string

          Go packages to install

        • npm: array of string

          Node.js packages to install

        • pip: array of string

          Python packages to install

        • type: optional "packages"

          Package configuration type

          • "packages"

      • type: "cloud"

        Environment type

        • "cloud"

    • BetaSelfHostedConfig object { type }

      Configuration for self-hosted environments.

      • type: "self_hosted"

        Environment type

        • "self_hosted"

  • created_at: string

    RFC 3339 timestamp when environment was created

  • description: string

    User-provided description for the environment

  • metadata: map[string]

    User-provided metadata key-value pairs

  • name: string

    Human-readable name for the environment

  • type: "environment"

    The type of object (always 'environment')

    • "environment"

  • updated_at: string

    RFC 3339 timestamp when environment was last updated

  • scope: optional "organization" or "account"

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

    • "organization"

    • "account"

Example

curl https://api.anthropic.com/v1/environments \
    -H 'Content-Type: application/json' \
    -H 'anthropic-version: 2023-06-01' \
    -H 'anthropic-beta: managed-agents-2026-04-01' \
    -H "X-Api-Key: $ANTHROPIC_API_KEY" \
    -d '{
          "name": "python-data-analysis",
          "config": {
            "type": "cloud",
            "networking": {
              "type": "limited",
              "allow_package_managers": true,
              "allowed_hosts": [
                "api.example.com"
              ]
            },
            "packages": {
              "pip": [
                "pandas",
                "numpy"
              ]
            }
          },
          "description": "Python environment with data-analysis packages."
        }'

Response

{
  "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"
}