Security and data handling changedclaude-tag/concepts/security-and-data
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Upstream edited this page at 2 Oct 2026 06:25 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 2 Oct 2026 06:37 UTC.
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99In channels, Claude acts under its own service accounts that an Owner provisions. By default it can read and post in Slack channels it's been added to and search public channels by keyword; it has no access to your external systems until an Owner or a [Claude Tag admin](/docs/claude-tag/admins/restrict-access#delegate-claude-tag-administration) adds connections. Each connection is scoped to specific channels and workspaces, and the actions Claude takes in connected tools are attributable to its own service accounts.
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11Every channel request, whether a person typed it or a schedule triggered it, follows the same path: it runs in an isolated sandbox that holds no credentials. In an Anthropic-hosted environment, requests leave that sandbox only through Agent Proxy and reach your systems under the agent's own accounts. Sessions in a [self-hosted environment](https://code.claude.com/docs/en/self-hosted-environments) run on runners inside your network, and Claude can't use Access bundles in those sessions yet.
11Every channel request, whether a person typed it or a schedule triggered it, follows the same path: it runs in an isolated sandbox, and the credentials you provision aren't placed in that sandbox. In an Anthropic-hosted environment, requests leave that sandbox only through Agent Proxy and reach your systems under the agent's own accounts. Sessions in a [self-hosted environment](https://code.claude.com/docs/en/self-hosted-environments) run on runners inside your network, and Claude can't use Access bundles in those sessions yet.
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1313DMs from members who have connected a Claude account run on the member's own claude.ai account instead and are covered separately on [How agent identity works](/docs/claude-tag/concepts/agent-identity#direct-message-channels). For DMs from members who haven't, see [Direct messages from members without a Claude account](/docs/claude-tag/admins/restrict-access#access-in-a-direct-message-from-a-member-without-a-claude-account).
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1717Each Slack thread runs in its own sandbox. In an Anthropic-hosted environment, every outbound call from that sandbox passes through the same checkpoints.
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19<img className="block dark:hidden" src="https://mintcdn.com/claude-ai/oY6LusJt4c576Dc3/images/claude-tag/diagrams/request-path.svg?fit=max&auto=format&n=oY6LusJt4c576Dc3&q=85&s=a7f2e0f4303072b4c8e4f3197bf0cb12" alt="Diagram showing the request path across three zones, labeled your Slack workspace, Anthropic's infrastructure, and your systems. A task mentioned in the Slack workspace runs in a session sandbox in the middle zone, one sandbox per thread, holding no credentials. Outbound requests pass to Agent Proxy, which injects the credential drawn from the credential store; a request that no rule, domain entry, or environment network access setting allows is blocked. Credentialed requests reach your systems, like GitHub, a data warehouse, monitoring, or any HTTP API. A dashed return path shows results posting back in the thread, as Claude." width="1000" height="440" data-path="images/claude-tag/diagrams/request-path.svg" />
19<img className="block dark:hidden" src="https://mintcdn.com/claude-ai/lijct3C2aoA3LHFn/images/claude-tag/diagrams/request-path.svg?fit=max&auto=format&n=lijct3C2aoA3LHFn&q=85&s=10d796e77738a52a505dcab2c9950cda" alt="Diagram showing the request path across three zones, labeled your Slack workspace, Anthropic's infrastructure, and your systems. A task mentioned in the Slack workspace runs in a session sandbox in the middle zone, one sandbox per thread, holding no stored credentials. Outbound requests pass to Agent Proxy, which injects the credential drawn from the credential store; a request that no rule, domain entry, or environment network access setting allows is blocked. Credentialed requests reach your systems, like GitHub, a data warehouse, monitoring, or any HTTP API. A dashed return path shows results posting back in the thread, as Claude." width="1000" height="440" data-path="images/claude-tag/diagrams/request-path.svg" />
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21<img className="hidden dark:block" src="https://mintcdn.com/claude-ai/oY6LusJt4c576Dc3/images/claude-tag/diagrams/request-path-dark.svg?fit=max&auto=format&n=oY6LusJt4c576Dc3&q=85&s=a728805c81b642004e1e15da96967e4c" alt="Diagram showing the request path across three zones, labeled your Slack workspace, Anthropic's infrastructure, and your systems. A task mentioned in the Slack workspace runs in a session sandbox in the middle zone, one sandbox per thread, holding no credentials. Outbound requests pass to Agent Proxy, which injects the credential drawn from the credential store; a request that no rule, domain entry, or environment network access setting allows is blocked. Credentialed requests reach your systems, like GitHub, a data warehouse, monitoring, or any HTTP API. A dashed return path shows results posting back in the thread, as Claude." width="1000" height="440" data-path="images/claude-tag/diagrams/request-path-dark.svg" />
21<img className="hidden dark:block" src="https://mintcdn.com/claude-ai/lijct3C2aoA3LHFn/images/claude-tag/diagrams/request-path-dark.svg?fit=max&auto=format&n=lijct3C2aoA3LHFn&q=85&s=613ad7bf32eee0f85bd3a26064dcc74a" alt="Diagram showing the request path across three zones, labeled your Slack workspace, Anthropic's infrastructure, and your systems. A task mentioned in the Slack workspace runs in a session sandbox in the middle zone, one sandbox per thread, holding no stored credentials. Outbound requests pass to Agent Proxy, which injects the credential drawn from the credential store; a request that no rule, domain entry, or environment network access setting allows is blocked. Credentialed requests reach your systems, like GitHub, a data warehouse, monitoring, or any HTTP API. A dashed return path shows results posting back in the thread, as Claude." width="1000" height="440" data-path="images/claude-tag/diagrams/request-path-dark.svg" />
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2323| Checkpoint | The guarantee |
2424| :- | :- |
25| The sandbox | Holds no credentials |
25| The sandbox | Holds none of the credentials you provision |
2626| Agent Proxy | Injects credentials from the credential store at request time, and blocks a request that no [connection](/docs/claude-tag/admins/add-connections#set-allowed-websites), [**Domains** entry](/docs/claude-tag/admins/add-connections#allow-a-host-without-a-credential), or [environment network access level](/docs/claude-tag/admins/add-connections#broad-web-access-through-the-environment) allows |
2727| Your systems | See the agent's own accounts, so its actions there are attributable |
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5252In an Anthropic-hosted environment, outbound traffic from a channel session's sandbox is default-deny. Requests go only to hosts an allow layer covers, and the layers are a [connection's Allowed websites](/docs/claude-tag/admins/connections/custom#fill-out-the-custom-tool-form), the [bundle's Domains tab](/docs/claude-tag/admins/add-connections#allow-a-host-without-a-credential), and the network access setting of the [environment](/docs/claude-tag/concepts/glossary#environment) the scope's sessions run on. A new environment's default level, Trusted access, already covers a [documented set of package registries and developer hosts](https://code.claude.com/docs/en/cloud-environments#default-allowed-domains). See [Agent Proxy](/docs/claude-tag/concepts/agent-identity#agent-proxy) for what happens to a request under each layer.
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54<img className="block dark:hidden" src="https://mintcdn.com/claude-ai/Tf9m3OvmKAZp3uXC/images/claude-tag/diagrams/proxy-decision.svg?fit=max&auto=format&n=Tf9m3OvmKAZp3uXC&q=85&s=a4aecacf4e23944d5a2ecaacf6cf95a1" alt="Flow diagram across two zones, labeled Anthropic's infrastructure and your systems. In the first zone, a session sandbox that holds no credentials sends every outbound request to Agent Proxy, which matches it against admin rules. Three outcomes branch toward your systems: on a rule match, the credential is attached at the boundary and the request proceeds; on an allowlist-only match, from the bundle's Domains list or the environment's network access setting, the request is sent without credentials; on no match, the request is blocked entirely (the default-deny outcome) and the host is unreachable." width="1000" height="400" data-path="images/claude-tag/diagrams/proxy-decision.svg" />
54<img className="block dark:hidden" src="https://mintcdn.com/claude-ai/lijct3C2aoA3LHFn/images/claude-tag/diagrams/proxy-decision.svg?fit=max&auto=format&n=lijct3C2aoA3LHFn&q=85&s=31de5c6d6a10b635374d9fa4861a111f" alt="Flow diagram across two zones, labeled Anthropic's infrastructure and your systems. In the first zone, a session sandbox that holds no stored credentials sends every outbound request to Agent Proxy, which matches it against admin rules. Three outcomes branch toward your systems: on a rule match, the credential is attached at the boundary and the request proceeds; on an allowlist-only match, from the bundle's Domains list or the environment's network access setting, the request is sent without credentials; on no match, the request is blocked entirely (the default-deny outcome) and the host is unreachable." width="1000" height="400" data-path="images/claude-tag/diagrams/proxy-decision.svg" />
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56<img className="hidden dark:block" src="https://mintcdn.com/claude-ai/Tf9m3OvmKAZp3uXC/images/claude-tag/diagrams/proxy-decision-dark.svg?fit=max&auto=format&n=Tf9m3OvmKAZp3uXC&q=85&s=d2ad1dd61b859e9f2aebfceedbc247c3" alt="Flow diagram across two zones, labeled Anthropic's infrastructure and your systems. In the first zone, a session sandbox that holds no credentials sends every outbound request to Agent Proxy, which matches it against admin rules. Three outcomes branch toward your systems: on a rule match, the credential is attached at the boundary and the request proceeds; on an allowlist-only match, from the bundle's Domains list or the environment's network access setting, the request is sent without credentials; on no match, the request is blocked entirely (the default-deny outcome) and the host is unreachable." width="1000" height="400" data-path="images/claude-tag/diagrams/proxy-decision-dark.svg" />
56<img className="hidden dark:block" src="https://mintcdn.com/claude-ai/lijct3C2aoA3LHFn/images/claude-tag/diagrams/proxy-decision-dark.svg?fit=max&auto=format&n=lijct3C2aoA3LHFn&q=85&s=b67da069feb4070186d4eca67eb40878" alt="Flow diagram across two zones, labeled Anthropic's infrastructure and your systems. In the first zone, a session sandbox that holds no stored credentials sends every outbound request to Agent Proxy, which matches it against admin rules. Three outcomes branch toward your systems: on a rule match, the credential is attached at the boundary and the request proceeds; on an allowlist-only match, from the bundle's Domains list or the environment's network access setting, the request is sent without credentials; on no match, the request is blocked entirely (the default-deny outcome) and the host is unreachable." width="1000" height="400" data-path="images/claude-tag/diagrams/proxy-decision-dark.svg" />
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5858Because requests to any other host are blocked, data can only leave the sandbox to hosts an allow layer covers. An admin sets the Allowed websites list on each connection and the Domains tab on each bundle. An admin sets the environment's network access level, which defaults to Trusted access, from the **Cloud environments** page in [admin settings](https://claude.ai/admin-settings). See [Set allowed websites](/docs/claude-tag/admins/add-connections#set-allowed-websites) and [Allow a host without a credential](/docs/claude-tag/admins/add-connections#allow-a-host-without-a-credential).
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60Organizations can opt in to allow-all egress, where a `*` entry on a bundle's Domains tab admits requests to any host on the ports that entry lists, still without credentials. Private and internal network addresses and cloud metadata endpoints remain blocked. Allow-all egress is off by default and enabled per organization by Anthropic; see [Allow all hosts](/docs/claude-tag/admins/add-connections#allow-all-hosts).
60Allow-all egress is a `*` entry on a bundle's Domains tab. The entry admits requests to any host on the ports it lists, still without credentials. Private and internal network addresses and cloud metadata endpoints remain blocked. See [Allow all hosts](/docs/claude-tag/admins/add-connections#allow-all-hosts).
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6262### Service accounts
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