Memory MCP server

by letta.com·com.letta/memory-mcp·v2.0.2

MCP server for AI memory management using Letta - Standard MCP format

C55/100grade C

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Safety scan

C55/100

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64 downloads/wk

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If you have run it, two minutes of your experience saves the next person an afternoon.

write = sends, deletes, buys or posts

Read from the package source without running it. The installed server may list more.

add_vector_memory
Add episodic memories into your vector store to be searchable at a later time. These memories are NOT part of your memory about the user, and will be stored in a vector DB until retrieved explicitly with the vector search tool.
get_memory
Get a summary of the memories you have about the user you are currently interacting with. You should call this tool at the beginning of the conversation, since you will always start with an empty session that does not include previous interactions.
memory_append
Append to the memory you have about the user you are currently interacting with.
memory_replace
Replace the memory you have about the user you are currently interacting with.
search_vector_memory
Search your vector store for relevant episodic memories to inform the current conversation. This can be used to retrieve information that is not currently in your conversation or context.

scanner v0.1.9 · 2026-09-27 · same rubric, same numbers if you re-run it

no findings

Code scan2 source files scanned25/25
–Live reliabilityno gateway calls yet and no remote to proben/a
–Tool poisoningtools not inspected (local package is not executed); not countedn/a
Auth qualitystatic API keys via environment variables6/15
Maintenancerepository not readable: repo not found3/15
Maintainer identityno repository or website to verify2/10

Overall 55/100. Components that don't apply are left out of the denominator. Any critical finding is an F.Rubric Appeal a finding JSON

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score: 55/100; higher than 10% of 48,255 servers
Tools: 5; the typical server has 7
Tools that change things: 0%; typical: 0%. Fewer write tools means less an agent can break
Downloads a week: 64; more than 51% of 12,191 servers with a package

What its tools let an agent do: 4 read · 1 create

Runs npx -y @letta-ai/memory-mcp on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add memory-mcp -- npx -y @letta-ai/memory-mcp

Is Memory MCP server safe?: With care: it is graded C, so read the findings first (55/100). Read the Memory safety report
How do I install Memory?: It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Memory need an API key?: Yes. The registry entry asks for LETTA_API_KEY.
Is Memory maintained?: The latest release is v2.0.2.
How does Memory compare with other MCP servers?: safety score 55/100 (higher than 10% of 48,255 servers); tools 5 (the typical server has 7); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.