memory-tool changedagents-and-tools/tool-use/memory-tool
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## Availability ### API support #### [Messages API](https://platform.claude.com/docs/en/build-with-claude/working-with-messages) ### Data handling
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22title: Memory tool
33url: https://platform.claude.com/docs/en/agents-and-tools/tool-use/memory-tool
44description: Let Claude store and retrieve information across conversations by implementing the memory tool's file operations in your application.
5featureMetadata:
6 status: ga
7 zdr:
8 eligibility: eligible
9 note: Excludes [Covered Models](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#model-specific-data-retention-requirements). Client-side memory storage where you control data retention.
10 supportedModels:
11 - claude-fable-5-1
12 - claude-mythos-5-1
13 - claude-fable-5
14 - claude-mythos-5
15 - claude-mythos-preview
16 - claude-opus-5-5
17 - claude-opus-5
18 - claude-sonnet-5-5
19 - claude-sonnet-5
20 - claude-haiku-5-5
21 - claude-haiku-4-5-20251001
22 - claude-opus-4-8
23 - claude-opus-4-7
24 - claude-opus-4-6
25 - claude-sonnet-4-6
26 - claude-opus-4-5-20251101
27 - claude-sonnet-4-5-20250929
28 supportedPlatforms:
29 Claude API: ga
30 Claude Platform on AWS: ga
31 Claude Models on Google Cloud (Anthropic managed): ga
32 Amazon Bedrock: ga
33 Amazon Bedrock (InvokeModel): ga
34 Claude Models on Google Cloud (Google managed): ga
35 Microsoft Foundry: ga
536---
637
738The memory tool lets Claude store and retrieve information across conversations in a directory of memory files. Claude can create, read, update, and delete files that persist between sessions, building up knowledge over time without keeping everything in the context window.
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1445 Use the [feedback form](https://forms.gle/YXC2EKGMhjN1c4L88) to share your feedback on this feature.
1546</Note>
1647
17<Note>
18 To learn how zero data retention (ZDR) applies to this feature, see [API and data retention](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention).
19</Note>
20
2148## Use cases
2249
2350* Maintain project context across multiple agent sessions
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10191046 Directory of Anthropic-provided tools and reference for optional tool definition properties.
10201047 </Card>
10211048</CardGroup>
1049
1050## Availability
1051
1052Memory tool is available on every model and eligible for zero data retention and HIPAA readiness.
1053
1054### API support
1055
1056#### [Messages API](https://platform.claude.com/docs/en/build-with-claude/working-with-messages)
1057
1058* Availability: Available
1059
1060| Status | Models |
1061| --------- | ----------------------------------------------------------------- |
1062| Available | [All models](https://platform.claude.com/docs/en/models/overview) |
1063
1064### Data handling
1065
1066[Data handling overview](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#feature-eligibility)
1067
1068| Item | Zero data retention | HIPAA |
1069| ------- | --------------------------------------------------------------------------------------------------------------------------------------------------------- | -------- |
1070| Status | Eligible (excludes [Covered Models](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#model-specific-data-retention-requirements)) | Eligible |
1071| Details | Client-side memory storage where you control data retention. | — |
1072
1073Applicable endpoints:
1074
1075* `/v1/messages` with `memory` tool
10221076
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