MCP server for AI memory management using Letta - Standard MCP format
Connect Runs on your machine
claude mcp add memory-mcp -e LETTA_API_KEY=<LETTA_API_KEY> -e LETTA_USER_ID=<LETTA_USER_ID> -- npx -y @letta-ai/[email protected]
{
"mcpServers": {
"memory-mcp": {
"command": "npx",
"args": [
"-y",
"@letta-ai/[email protected]"
],
"env": {
"LETTA_API_KEY": "<LETTA_API_KEY>",
"LETTA_USER_ID": "<LETTA_USER_ID>"
}
}
}
}
{
"mcpServers": {
"memory-mcp": {
"command": "npx",
"args": [
"-y",
"@letta-ai/[email protected]"
],
"env": {
"LETTA_API_KEY": "<LETTA_API_KEY>",
"LETTA_USER_ID": "<LETTA_USER_ID>"
}
}
}
}
{
"servers": {
"memory-mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@letta-ai/[email protected]"
],
"env": {
"LETTA_API_KEY": "<LETTA_API_KEY>",
"LETTA_USER_ID": "<LETTA_USER_ID>"
}
}
}
}
Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
LETTA_API_KEYRequired, secret | Letta API key for memory operations |
LETTA_USER_IDOptional | Unique user identifier for associated memories |
Details
| Package | @letta-ai/[email protected] (NPM, stdio) |
| First published | 9 Sep 2025 |
| Last updated | 9 Sep 2025 |
| Registry name | com.letta/memory-mcp |
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