Toolofficial publisher

memory (Anthropic)

Tool : A precise action the AI can call · requires anthropic-api

Persistent Claude memory stored in files you host.

Simple and transparent: the memory is readable and deletable.

Docs

Overall score

6.5 /10

Security: one caveat, see the card

Utility

7.0

Reliability

6.0

Security

One caveat

Ease

5 min · Technical

Security reflects where data goes, requested permissions and incidents on record at the verification date. It is not a guarantee of zero risk: check the deployment mode and the connections you enable.

What it does, concretely

When a conversation ends, Claude forgets everything that was discussed. The memory tool solves this by letting Claude store information in files hosted by your application, and read them back in future sessions.

In practice, Claude sends read and write requests to a /memories directory. Your application receives these requests, executes them against storage you control (local files, a database, cloud storage) and returns the result to Claude. Claude can then create, read, update and delete files across sessions, without loading all context at once.

This tool is aimed at developers building agents or conversational applications via the Anthropic API who need continuity across sessions: project tracking, user preference retention, or progressively building a knowledge base.

It is not suited for non-technical users: integrating it requires writing code to handle the tool-use loop and file storage. There is no ready-made version accessible without development.

What it offers

·Reads the memory directory at the start of each task to retrieve relevant context.
·Creates memory files to record new information across sessions.
·Targeted editing of existing files via text replacement or insertion at a specific line.
·Deletion of files or entire directories to remove outdated information.
·Renaming and moving files within the memory directory.
·Compatible with multiple storage backends: local filesystem, database, cloud storage, or encrypted files.
·Helpers available in Python, TypeScript, C#, Java, PHP and Ruby SDKs to simplify integration.

Our tips

Use the BetaLocalFilesystemMemoryTool class (Python or TypeScript) to get started quickly with local filesystem storage, without writing your own handler.
Restrict all operations to the /memories directory in your handler to prevent path traversal attacks: this is the most important security precaution.
To ensure continuity between two conversations, send exactly the same tools entry and point your handler to the same storage: Claude will pick up where it left off.
Organise memory files into thematic subdirectories (by project, by user) so Claude can quickly retrieve relevant context without loading unnecessary information.
Review the complete examples provided in each SDK (for example examples/memory/basic.py in Python) before writing your own implementation.

Watch out

The tool operates client-side: if your handler does not properly validate paths, Claude could theoretically request operations outside the /memories directory.
The in-memory stores provided in the Go, PHP and Ruby examples are for demonstration purposes only and do not persist across restarts: they must be replaced with a real storage backend in production.

In practice

Price: Free
Commercial use: Commercial use: yes
Available on: api
Host: anthropic-api
FR interface: No

Security and data

Rating: Security: one caveat, see the card
Capabilities: readswritesexecutesnetwork
Your data: Data stays local
Maintenance: Active

Links and repository checked on 25 October 2026 · added on 1 August 2025

How to install memory (Anthropic)

1. Obtain an Anthropic API key at platform.claude.com. 2. Install the SDK for your language (for example: pip install anthropic in Python). 3. Add the entry {"type": "memory_20250818", "name": "memory"} to the tools array in your request. 4. Implement a client-side handler that executes the view, create, str_replace, insert, delete and rename commands against your storage. 5. In that handler, reject any operation whose path falls outside the /memories directory (path traversal protection). 6. Use BetaLocalFilesystemMemoryTool (Python/TypeScript) or refer to the SDK examples for your language to get started quickly.

pip install anthropic

Official documentation ↗

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