# jevmem (MCP server)

> jevmem is an MCP server that adds developer tools to AI assistants such as Claude Desktop, Claude Code and Cursor. Automatic project memory for Claude Code. It has 122 GitHub stars, is released under the MIT license and runs locally with npx -y jevmem.

Say it once. jevmem saves the decisions, rules and failed approaches from your Claude Code chats to JEVMEM.md in your repo, and brings the relevant ones back next session. Before Claude runs a command or edits a file, it checks the call against your saved rules. It is open source (MIT), built on TypeSafe AI's Jev, in Anthropic's Claude plugin directory and on the MCP Registry, and works with Cursor and Codex over MCP.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/Avinash-jetwani/jevmem |
| GitHub stars | 122 |
| License | MIT |
| Language | TypeScript |
| Transport | stdio |
| Packages | npm: jevmem |
| Remote URL | none |
| Needs API key | yes |
| Official | no |
| Works with | Claude Desktop, Claude Code, Cursor, VS Code |
| Category | Developer tools |
| Latest release | v0.6.6 (Oct 6, 2026) |
| Last commit | Oct 6, 2026 |
| MCP registry name | io.github.Avinash-jetwani/jevmem |

## Install

### Claude Desktop (claude_desktop_config.json)

```json
{
  "mcpServers": {
    "jevmem": {
      "command": "npx",
      "args": [
        "-y",
        "jevmem"
      ],
      "env": {
        "TYPESAFE_API_KEY": "your-value"
      }
    }
  }
}
```

Settings > Developer > Edit Config. macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\. Restart Claude Desktop afterwards.

### Claude Code

```sh
claude mcp add --env TYPESAFE_API_KEY=your-value --transport stdio jevmem -- npx -y jevmem
```

### Cursor (.cursor/mcp.json)

```json
{
  "mcpServers": {
    "jevmem": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "jevmem"
      ],
      "env": {
        "TYPESAFE_API_KEY": "your-value"
      }
    }
  }
}
```

Project file; use ~/.cursor/mcp.json to enable it in every project.

### VS Code (.vscode/mcp.json)

```json
{
  "inputs": [
    {
      "type": "promptString",
      "id": "typesafe_api_key",
      "description": "TYPESAFE_API_KEY",
      "password": true
    }
  ],
  "servers": {
    "jevmem": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "jevmem"
      ],
      "env": {
        "TYPESAFE_API_KEY": "${input:typesafe_api_key}"
      }
    }
  }
}
```

Config formats checked against the official docs on 2026-10-07.

## Environment variables

- `TYPESAFE_API_KEY` (secret): TypeSafe API key for Jev, which addmemory, searchmemory and audit_memory use. If unset, the server reads it from /.jevmem/.env or ~/.jevmem/env.
- `JEVMEM_ROOT`: Project root, for clients that start the server without a project working directory (Claude Desktop). One server entry serves one project.
- `TYPESAFE_BASE_URL`: Send Jev requests through a proxy or gateway instead of api.typesafe.ai.
- `JEVMEM_CACHE`: 0 turns off the answer cache in .jevmem/.

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---

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