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165165* **Yes (qualified):** Your prompts and Claude's outputs are not stored, but a bounded technical artifact (named in the Details column) is retained briefly for the feature to function. See [How Anthropic approaches data retention](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#how-anthropic-approaches-data-retention) for the commitments that govern these features.

166166* **No:** The feature is not eligible. Under HIPAA readiness, the API blocks requests that include a "No" feature and returns a `400` error, unless the feature's Details column says otherwise. Under ZDR, the API does **not** block these features; using one is a choice to step outside your ZDR arrangement for that specific data, and the feature's own documented retention policy applies. Features marked "No" for ZDR are typically stateful (they store jobs, files, or container state), which is why they cannot be zero-retention.

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169| -------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------ | ------------------------------------------------------- | ----------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

172| [Advisor tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/advisor-tool) | `/v1/messages` (with `advisor` tool) | <Eligible>Yes</Eligible> | <Eligible status="no">No</Eligible> | Advisor model output is returned in the API response; nothing is stored server-side after the response. |

173| [Agent skills](https://platform.claude.com/docs/en/agents-and-tools/agent-skills/overview) | `/v1/messages` (with `skills`) / `/v1/skills` | <Eligible status="no">No</Eligible> | <Eligible status="no">No</Eligible> | Skill data retained per standard policy. See [Agent skills](https://platform.claude.com/docs/en/agents-and-tools/agent-skills/overview#data-retention). |

175| [Batch processing](https://platform.claude.com/docs/en/build-with-claude/batch-processing) | `/v1/messages/batches` | <Eligible status="no">No</Eligible> | <Eligible status="no">No</Eligible> | 29-day retention; async storage required. See [Batch processing](https://platform.claude.com/docs/en/build-with-claude/batch-processing#data-retention). |

176| [Browser use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/browser-use-tool) | `/v1/messages` (with `browser` toolset) | <Eligible>Yes</Eligible> | <Eligible status="no">No</Eligible> | Client-side tool. Anthropic does not run browser actions or retain page content beyond standard API handling. Not covered under HIPAA readiness; requests that include the browser use tool are not blocked. See [Browser use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/browser-use-tool#data-retention). |

177| [Cache diagnostics](https://platform.claude.com/docs/en/build-with-claude/cache-diagnostics) | `/v1/messages` (with `diagnostics`) | <Eligible status="qualified">Yes (qualified)</Eligible> | <Eligible status="no">No</Eligible> | Your prompts and Claude's outputs are not stored. A fingerprint of cryptographic hashes and token-count estimates is retained briefly to enable comparison against the next request. See [Cache diagnostics](https://platform.claude.com/docs/en/build-with-claude/cache-diagnostics#data-retention). |

179| [Claude Managed Agents](https://platform.claude.com/docs/en/managed-agents/overview) | `/v1/agents`, `/v1/sessions`, `/v1/environments` | <Eligible status="no">No</Eligible> | <Eligible status="no">No</Eligible> | Sessions are stateful resources; transcripts persist until you delete them. Applies to all Managed Agents sub-features, including [Self-hosted sandboxes](https://platform.claude.com/docs/en/managed-agents/self-hosted-sandboxes). |

180| [Code execution](https://platform.claude.com/docs/en/agents-and-tools/tool-use/code-execution-tool) | `/v1/messages` (with `code_execution` tool) | <Eligible status="no">No</Eligible> | <Eligible status="no">No</Eligible> | Container data retained up to 30 days. See [Code execution](https://platform.claude.com/docs/en/agents-and-tools/tool-use/code-execution-tool#data-retention). |

181| [Computer use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/computer-use-tool) | `/v1/messages` (with `computer` toolset or tool) | <Eligible>Yes</Eligible> | <Eligible>Yes</Eligible> | Client-side tool where screenshots and files are captured and stored in your environment, not by Anthropic. See [Computer use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/computer-use-tool#data-retention). |

182| [Context editing](https://platform.claude.com/docs/en/build-with-claude/context-editing) | `/v1/messages` (with `context_management`) | <Eligible>Yes</Eligible> | <Eligible status="no">No</Eligible> | Context edits (tool use clearing and thinking clearing) are applied in real time. |

183| [Context management (compaction)](https://platform.claude.com/docs/en/build-with-claude/compaction-threshold) | `/v1/messages` (with `context_management`) | <Eligible>Yes</Eligible> | <Eligible status="no">No</Eligible> | Server-side compaction results are returned and round-tripped statelessly through the API response. |

186| [Fast mode](https://platform.claude.com/docs/en/build-with-claude/fast-mode) | `/v1/messages` (with `speed: "fast"`) | <Eligible>Yes</Eligible> | <Eligible>Yes</Eligible> | Same Messages API endpoint with faster inference. ZDR applies regardless of speed setting. |

187| [Files API](https://platform.claude.com/docs/en/build-with-claude/files) | `/v1/files` | <Eligible status="no">No</Eligible> | <Eligible status="no">No</Eligible> | Files retained until explicitly deleted or they reach their configured expiration. See [Files API](https://platform.claude.com/docs/en/build-with-claude/files#data-retention). |

189| [MCP connector](https://platform.claude.com/docs/en/agents-and-tools/mcp-connector) | `/v1/messages` (with `mcp_servers`) | <Eligible status="no">No</Eligible> | <Eligible status="no">No</Eligible> | Data retained per standard policy. See [MCP connector](https://platform.claude.com/docs/en/agents-and-tools/mcp-connector#data-retention). |

190| [MCP tunnels](https://platform.claude.com/docs/en/agents-and-tools/mcp-tunnels/overview) | `/v1/tunnels` | <Eligible status="no">No</Eligible> | <Eligible status="no">No</Eligible> | Research preview. See [MCP tunnels security](https://platform.claude.com/docs/en/agents-and-tools/mcp-tunnels/security) for the data-flow boundary and subprocessor details. |

193| [Mid-conversation system messages](https://platform.claude.com/docs/en/build-with-claude/mid-conversation-system-messages) | `/v1/messages` (with `role: "system"` messages) | <Eligible>Yes</Eligible> | <Eligible>Yes</Eligible> | Request-shape capability of the Messages API; mid-conversation system messages flow through the standard inference path and nothing is stored server-side after the response. |

195| [Programmatic tool calling](https://platform.claude.com/docs/en/agents-and-tools/tool-use/programmatic-tool-calling) | `/v1/messages` (with `code_execution` tool) | <Eligible status="no">No</Eligible> | <Eligible status="no">No</Eligible> | Built on code execution containers; data retained up to 30 days. See [Programmatic tool calling](https://platform.claude.com/docs/en/agents-and-tools/tool-use/programmatic-tool-calling#data-retention). |

196| [Prompt caching](https://platform.claude.com/docs/en/build-with-claude/prompt-caching) | `/v1/messages` | <Eligible>Yes</Eligible> | <Eligible>Yes</Eligible> | Your prompts and Claude's outputs are not stored. KV cache representations and cryptographic hashes are held in memory for the cache TTL and promptly deleted after expiry. See [Prompt caching](https://platform.claude.com/docs/en/build-with-claude/prompt-caching#data-retention). |

198| [Structured outputs](https://platform.claude.com/docs/en/build-with-claude/structured-outputs) | `/v1/messages` | <Eligible status="qualified">Yes (qualified)</Eligible> | <Eligible>Yes</Eligible> | Your prompts and Claude's outputs are not stored. Only the JSON schema is cached, for up to 24 hours since last use. This also covers [strict tool use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/strict-tool-use) (`strict: true` on tools), which uses the same grammar pipeline. PHI must not be included in JSON schema definitions; see [PHI handling guidelines](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#phi-handling-guidelines). See [Structured outputs](https://platform.claude.com/docs/en/build-with-claude/structured-outputs#data-retention). |

202| [Tool search](https://platform.claude.com/docs/en/agents-and-tools/tool-use/tool-search-tool) | `/v1/messages` (with `tool_search` tool) | <Eligible>Yes</Eligible> | <Eligible status="no">No</Eligible> | Server-side tool executed by Anthropic; the tool definitions in the request are searched in memory per call and nothing is stored after the response. |

203| [Web fetch](https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-fetch-tool) | `/v1/messages` (with `web_fetch` tool) | <Eligible>Yes</Eligible> | <Eligible status="no">No</Eligible> | Fetched web content returned in the API response. [Dynamic filtering](https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-fetch-tool#dynamic-filtering) is not eligible for ZDR or HIPAA. Website publishers may retain request data (such as fetched URLs and request metadata) according to their own policies. |

204| [Web search](https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-search-tool) | `/v1/messages` (with `web_search` tool) | <Eligible>Yes</Eligible> | <Eligible>Yes</Eligible> | Real-time web search results returned in the API response. [Dynamic filtering](https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-search-tool#dynamic-filtering) is not eligible for ZDR or HIPAA. |

169| -------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------- | ------------------------------------------------------- | ----------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

172| [Advisor tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/advisor-tool) | `/v1/messages` with `advisor` tool | <Eligible>Yes</Eligible> | <Eligible status="no">No</Eligible> | Advisor model output is returned in the API response; nothing is stored server-side after the response. |

173| [Agent skills](https://platform.claude.com/docs/en/agents-and-tools/agent-skills/overview) | `/v1/skills` `/v1/messages` with `skills` | <Eligible status="no">No</Eligible> | <Eligible status="no">No</Eligible> | Skill data retained per standard policy. See [Agent skills](https://platform.claude.com/docs/en/agents-and-tools/agent-skills/overview#data-retention). |

176| [Browser use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/browser-use-tool) | `/v1/messages` with `browser` toolset | <Eligible>Yes</Eligible> | <Eligible status="no">No</Eligible> | Client-side tool. Anthropic does not run browser actions or retain page content beyond standard API handling. Not covered under HIPAA readiness; requests that include the browser use tool are not blocked. See [Browser use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/browser-use-tool#data-retention). |

177| [Cache diagnostics](https://platform.claude.com/docs/en/build-with-claude/cache-diagnostics) | `/v1/messages` with `diagnostics` | <Eligible status="qualified">Yes (qualified)</Eligible> | <Eligible status="no">No</Eligible> | Your prompts and Claude's outputs are not stored. A fingerprint of cryptographic hashes and token-count estimates is retained briefly to enable comparison against the next request. See [Cache diagnostics](https://platform.claude.com/docs/en/build-with-claude/cache-diagnostics#data-retention). |

179| [Claude Managed Agents](https://platform.claude.com/docs/en/managed-agents/overview) | `/v1/agents` `/v1/sessions` `/v1/environments` | <Eligible status="no">No</Eligible> | <Eligible status="no">No</Eligible> | Sessions are stateful resources; transcripts persist until you delete them. Applies to all Managed Agents sub-features, including [Self-hosted sandboxes](https://platform.claude.com/docs/en/managed-agents/self-hosted-sandboxes). |

180| [Code execution](https://platform.claude.com/docs/en/agents-and-tools/tool-use/code-execution-tool) | `/v1/messages` with `code_execution` tool | <Eligible status="no">No</Eligible> | <Eligible status="no">No</Eligible> | Container data retained up to 30 days. See [Code execution](https://platform.claude.com/docs/en/agents-and-tools/tool-use/code-execution-tool#data-retention). |

181| [Computer use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/computer-use-tool) | `/v1/messages` with `computer` toolset or tool | <Eligible>Yes</Eligible> | <Eligible>Yes</Eligible> | Client-side tool where screenshots and files are captured and stored in your environment, not by Anthropic. See [Computer use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/computer-use-tool#data-retention). |

182| [Context editing](https://platform.claude.com/docs/en/build-with-claude/context-editing) | `/v1/messages` with `context_management` | <Eligible>Yes</Eligible> | <Eligible status="no">No</Eligible> | Context edits (tool use clearing and thinking clearing) are applied in real time. |

183| [Context management (compaction)](https://platform.claude.com/docs/en/build-with-claude/compaction-threshold) | `/v1/messages` with `context_management` | <Eligible>Yes</Eligible> | <Eligible status="no">No</Eligible> | Server-side compaction results are returned and round-tripped statelessly through the API response. |

186| [Fast mode](https://platform.claude.com/docs/en/build-with-claude/fast-mode) | `/v1/messages` with `speed: "fast"` | <Eligible>Yes</Eligible> | <Eligible>Yes</Eligible> | Same Messages API endpoint with faster inference. ZDR applies regardless of speed setting. |

189| [MCP connector](https://platform.claude.com/docs/en/agents-and-tools/mcp-connector) | `/v1/messages` with `mcp_servers` | <Eligible status="no">No</Eligible> | <Eligible status="no">No</Eligible> | Data retained per standard policy. See [MCP connector](https://platform.claude.com/docs/en/agents-and-tools/mcp-connector#data-retention). |

193| [Mid-conversation system messages](https://platform.claude.com/docs/en/build-with-claude/mid-conversation-system-messages) | `/v1/messages` with `role: "system"` messages | <Eligible>Yes</Eligible> | <Eligible>Yes</Eligible> | Request-shape capability of the Messages API; mid-conversation system messages flow through the standard inference path and nothing is stored server-side after the response. |

195| [Programmatic tool calling](https://platform.claude.com/docs/en/agents-and-tools/tool-use/programmatic-tool-calling) | `/v1/messages` with `code_execution` tool | <Eligible status="no">No</Eligible> | <Eligible status="no">No</Eligible> | Built on code execution containers; data retained up to 30 days. See [Programmatic tool calling](https://platform.claude.com/docs/en/agents-and-tools/tool-use/programmatic-tool-calling#data-retention). |

202| [Tool search](https://platform.claude.com/docs/en/agents-and-tools/tool-use/tool-search-tool) | `/v1/messages` with `tool_search` tool | <Eligible>Yes</Eligible> | <Eligible status="no">No</Eligible> | Server-side tool executed by Anthropic; the tool definitions in the request are searched in memory per call and nothing is stored after the response. |

203| [Web fetch](https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-fetch-tool) | `/v1/messages` with `web_fetch` tool | <Eligible>Yes</Eligible> | <Eligible status="no">No</Eligible> | Fetched web content returned in the API response. [Dynamic filtering](https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-fetch-tool#dynamic-filtering) is not eligible for ZDR or HIPAA. Website publishers may retain request data (such as fetched URLs and request metadata) according to their own policies. |

204| [Web search](https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-search-tool) | `/v1/messages` with `web_search` tool | <Eligible>Yes</Eligible> | <Eligible>Yes</Eligible> | Real-time web search results returned in the API response. [Dynamic filtering](https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-search-tool#dynamic-filtering) is not eligible for ZDR or HIPAA. |

205205

206206## Retention regardless of arrangement

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