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144144| `downloads.claude.ai` | VM workspace bundle and Claude CLI binary, fetched at session start |
145145| `downloads.claude.ai` | Claude Code model catalog (signed picker metadata), polled every 5–15 minutes |
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147Without this host reachable, Chat conversations, Cowork tasks, and Code sessions cannot start on a device that has not yet downloaded these components. App updates often change one or both of these components, and the app then downloads the new versions from the same host. Devices installed with the [offline installer variant](/docs/third-party/claude-desktop/installation#offline-installation), which includes both components in the installer package, are not affected.
147Without this host reachable, Chat conversations, Cowork tasks, and Code sessions cannot start on a device that has not yet downloaded these components. App updates often change one or both of these components, and the app then downloads the new versions from the same host. Devices installed with the [offline installer variant](/docs/third-party/claude-desktop/installation#offline-installation), which includes both components in the installer package, are not affected. The model catalog fetch is not needed to run the app: set [`modelCatalogEnabled`](/docs/third-party/claude-desktop/configuration#modelcatalogenabled) to `false` to turn it off, or [`modelCatalogUrl`](/docs/third-party/claude-desktop/configuration#modelcatalogurl) to fetch the catalog from a mirror inside your network. While the catalog is unreachable, sessions still start and the model picker keeps the names and effort options the app last fetched or shipped with.
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149149### Inference provider
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268268## Disabling all Anthropic-bound connections
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270With `disableEssentialTelemetry`, `disableNonessentialTelemetry`, `disableNonessentialServices`, and `disableAutoUpdates` all set to `true`, the desktop application makes **no outbound connections to Anthropic-operated hosts at runtime**. If Code sessions can use Web Fetch, also set [`skipWebFetchPreflight`](/docs/third-party/claude-desktop/configuration#skipwebfetchpreflight) to `true` (or add `WebFetch` to `disabledBuiltinTools`), because Claude Code in [Code](/docs/third-party/claude-desktop/code) sessions otherwise checks each fetched domain with `api.anthropic.com`. The only required egress is `downloads.claude.ai` (for the VM workspace bundle and Claude CLI binary at session start) and your inference provider. With the [offline installer variant](/docs/third-party/claude-desktop/installation#offline-installation), `downloads.claude.ai` is not needed either, and your inference provider is the only required egress. Enabling [SSH remote sessions](/docs/third-party/claude-desktop/ssh-remote-sessions) adds `downloads.claude.ai` back, except on devices installed with the offline installer that connect only to Linux x64 or arm64 hosts: that installer bundles the remote-session components for those hosts, and connections to hosts on other platforms still download them. Enabling [import from claude.ai](/docs/third-party/claude-desktop/import) likewise lets the app reach `claude.ai` and `api.anthropic.com` (and `storage.googleapis.com` for the export download), but only while a user runs a sign-in import from the wizard.
270With `disableEssentialTelemetry`, `disableNonessentialTelemetry`, `disableNonessentialServices`, and `disableAutoUpdates` all set to `true`, and [`modelCatalogEnabled`](/docs/third-party/claude-desktop/configuration#modelcatalogenabled) set to `false`, the desktop application makes **no outbound connections to Anthropic-operated hosts at runtime**. Without `modelCatalogEnabled: false`, the app also fetches the signed model catalog from `downloads.claude.ai` at launch and then every 5 to 15 minutes, regardless of the four telemetry and update keys, and on devices installed with the offline installer too. A blocked catalog request affects nothing else, and the model picker keeps the names and effort options the app last fetched or shipped with. To keep the catalog without reaching `downloads.claude.ai`, set [`modelCatalogUrl`](/docs/third-party/claude-desktop/configuration#modelcatalogurl) to a mirror inside your network. If Code sessions can use Web Fetch, also set [`skipWebFetchPreflight`](/docs/third-party/claude-desktop/configuration#skipwebfetchpreflight) to `true` (or add `WebFetch` to `disabledBuiltinTools`), because Claude Code in [Code](/docs/third-party/claude-desktop/code) sessions otherwise checks each fetched domain with `api.anthropic.com`. The only required egress is `downloads.claude.ai` (for the VM workspace bundle and Claude CLI binary at session start) and your inference provider. With the [offline installer variant](/docs/third-party/claude-desktop/installation#offline-installation), `downloads.claude.ai` is not needed either, and your inference provider is the only required egress. Enabling [SSH remote sessions](/docs/third-party/claude-desktop/ssh-remote-sessions) adds `downloads.claude.ai` back, except on devices installed with the offline installer that connect only to Linux x64 or arm64 hosts: that installer bundles the remote-session components for those hosts, and connections to hosts on other platforms still download them. Enabling [import from claude.ai](/docs/third-party/claude-desktop/import) likewise lets the app reach `claude.ai` and `api.anthropic.com` (and `storage.googleapis.com` for the export download), but only while a user runs a sign-in import from the wizard.
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272An app that receives its configuration from the [Enterprise Admin Console](/docs/third-party/claude-desktop/admin-console) still connects to Anthropic with all four of these keys set to `true`. The app contacts `api.anthropic.com` at every launch and at each configuration check (every 10 minutes by default) to download its configuration. The app contacts `claude.ai` when the user signs in. While the organization's **Report desktop usage to this organization** switch is on, the app also sends [usage analytics](/docs/third-party/claude-desktop/admin-console#usage-analytics) counts to `api.anthropic.com` every few minutes during use. You turn the telemetry categories for these apps on and off on the console's **Telemetry & updates** page.
272An app that receives its configuration from the [Enterprise Admin Console](/docs/third-party/claude-desktop/admin-console) still connects to Anthropic with all of these keys set. It never fetches the model catalog (its model names and options come from the console's settings), and it contacts `api.anthropic.com` at every launch and at each configuration check (every 10 minutes by default) to download its configuration. The app contacts `claude.ai` when the user signs in. While the organization's **Report desktop usage to this organization** switch is on, the app also sends [usage analytics](/docs/third-party/claude-desktop/admin-console#usage-analytics) counts to `api.anthropic.com` every few minutes during use. You turn the telemetry categories for these apps on and off on the console's **Telemetry & updates** page.
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274274These settings control only the application's telemetry, update, and non-essential service connections. They do not change how your inference provider handles conversation content at the endpoint. On Microsoft Foundry, the Claude models behind your inference endpoint run in an Anthropic-operated service, so conversation content reaches Anthropic-operated infrastructure regardless of these settings. See [Data handling by provider](/docs/third-party/claude-desktop/overview#data-handling-by-provider) on the Overview page.
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