One read of Claude Documentationclaude-docs-20260819T033706Z
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1-1 of 1third-party/claude-desktop/telemetry Changed · +37 / -23 lines
from line 133
133133
134134### Always required
135135
136| Host | Purpose |
137| --------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
138| `downloads.claude.ai` | VM workspace bundle and Claude CLI binary, fetched at session start. **Without this, Cowork sessions cannot start**, unless the app was installed with the [offline installer variant](/docs/third-party/claude-desktop/installation#offline-installation), which includes both components in the installer package. |
136| Host | Purpose |
137| --------------------- | ------------------------------------------------------------------- |
138| `downloads.claude.ai` | VM workspace bundle and Claude CLI binary, fetched at session start |
139139
140Without this host reachable, Cowork sessions cannot start, unless the app was installed with the [offline installer variant](/docs/third-party/claude-desktop/installation#offline-installation), which includes both components in the installer package.
141
140142### Inference provider
141143
142144The host(s) for your configured provider. These carry conversation content.
from line 183
181183
182184### Auto-updates (`disableAutoUpdates: false`)
183185
184| Host | Purpose |
185| --------------------- | ---------------------------------------- |
186| `claude.ai` | Update feed |
187| `api.anthropic.com` | Update feed |
188| `downloads.claude.ai` | Update binaries (already required above) |
186| Host | Purpose |
187| --------------------- | ------------------------------------------------------------------ |
188| `claude.ai` | Update feed |
189| `api.anthropic.com` | Update feed (releases.claude.com when updateViaUpdatesHost is set) |
190| `downloads.claude.ai` | Update binaries |
189191
190192With [`updateViaUpdatesHost`](/docs/third-party/claude-desktop/configuration#updateviaupdateshost) set to `true`, the app reads the update feed from `releases.claude.com` instead of `claude.ai` and `api.anthropic.com`, so those two hosts are no longer needed for updates. Update binaries still come from `downloads.claude.ai`.
191193
192194### Essential telemetry (`disableEssentialTelemetry: false`)
193195
194| Host | Purpose |
195| ---------------------------------- | ----------------------------------------------------------------------------------------------- |
196| `sentry.io` | Crash and error reporting (apex; some firewalls don't match it under `*.sentry.io`) |
197| `*.sentry.io` | Crash and error reporting |
198| `*.ingest.us.sentry.io` | Crash and error reporting (listed separately for firewalls that match wildcards one label deep) |
199| `browser-intake-us5-datadoghq.com` | Performance timing. The configuration window lists additional regional Datadog intake hosts. |
196| Host | Purpose |
197| ---------------------------------- | ------------------------- |
198| `*.sentry.io` | Crash and error reporting |
199| `*.ingest.us.sentry.io` | Crash and error reporting |
200| `sentry.io` | Crash and error reporting |
201| `browser-intake-datadoghq.com` | Performance timing |
202| `browser-intake-us3-datadoghq.com` | Performance timing |
203| `browser-intake-us5-datadoghq.com` | Performance timing |
204| `browser-intake-ap1-datadoghq.com` | Performance timing |
205| `browser-intake-ap2-datadoghq.com` | Performance timing |
206| `browser-intake-datadoghq.eu` | Performance timing |
207| `browser-intake-ddog-gov.com` | Performance timing |
200208
209The `sentry.io` apex is listed alongside the wildcards because some firewalls don't match it under `*.sentry.io`, and `*.ingest.us.sentry.io` is listed separately for firewalls that match wildcards one label deep.
210
201211### Non-essential telemetry (`disableNonessentialTelemetry: false`)
202212
203213| Host | Purpose |
204214| --------------------- | --------------------------------------------------------------- |
205215| `a-cdn.anthropic.com` | Analytics SDK |
206| `api.anthropic.com` | Claude Code usage telemetry, sent from inside the agent sandbox |
207216| `a-api.anthropic.com` | Analytics events |
208217| `claude.ai` | Analytics events |
218| `api.anthropic.com` | Claude Code usage telemetry, sent from inside the agent sandbox |
209219
210220### Non-essential services (`disableNonessentialServices: false`)
211221
212| Host | Purpose |
213| ------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
214| `api.anthropic.com` | MCP connector directory |
215| `www.claudeusercontent.com` | Artifact preview iframe |
216| `*.claudemcpcontent.com` | [MCP Apps](/docs/connectors/building/mcp-apps/getting-started), the interactive widgets connectors can render. Each widget loads in a sandboxed iframe on its own generated subdomain, so allowlist the wildcard. |
217| `assets.claude.ai` | Fonts loaded by MCP App widget iframes |
218| `cdnjs.cloudflare.com`, `cdn.jsdelivr.net`, `fonts.googleapis.com` | Artifact preview asset CDNs |
219| `www.google.com`, `*.gstatic.com` | Connector favicons |
222| Host | Purpose |
223| --------------------------- | -------------------------------------- |
224| `www.google.com` | Connector favicons |
225| `*.gstatic.com` | Connector favicons |
226| `www.claudeusercontent.com` | Artifact preview iframe |
227| `cdnjs.cloudflare.com` | Artifact preview asset CDNs |
228| `fonts.googleapis.com` | Artifact preview asset CDNs |
229| `cdn.jsdelivr.net` | Artifact preview asset CDNs |
230| `*.claudemcpcontent.com` | MCP App widget iframe |
231| `assets.claude.ai` | Fonts loaded by MCP App widget iframes |
232
233`*.claudemcpcontent.com` serves [MCP Apps](/docs/connectors/building/mcp-apps/getting-started), the interactive widgets connectors can render. Each widget loads in a sandboxed iframe on its own generated subdomain, so allowlist the wildcard.
220234
221235### Optional features
222236