# jevnav MCP server

> Enables AI agents to perform auditable, replayable browser automation using structured page facts and probabilistic element selection.

- Repository: https://github.com/dtduc-git/jevnav
- Page: https://hostedmcp.org/servers/dtduc-git/jevnav
- Transport: stdio
- Stars: 2
- License: Apache-2.0
- Latest version: 0.2.2

## Install

### Claude Code

```sh
claude mcp add --env 'TYPESAFE_API_KEY=<YOUR_TYPESAFE_API_KEY>' jevnav -- uvx jevnav
```

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

```json
{
  "mcpServers": {
    "jevnav": {
      "command": "uvx",
      "args": [
        "jevnav"
      ],
      "env": {
        "TYPESAFE_API_KEY": "<YOUR_TYPESAFE_API_KEY>"
      }
    }
  }
}
```

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

```json
{
  "servers": {
    "jevnav": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "jevnav"
      ],
      "env": {
        "TYPESAFE_API_KEY": "<YOUR_TYPESAFE_API_KEY>"
      }
    }
  }
}
```

### VS Code CLI

```sh
code --add-mcp '{"name":"jevnav","type":"stdio","command":"uvx","args":["jevnav"],"env":{"TYPESAFE_API_KEY":"<YOUR_TYPESAFE_API_KEY>"}}'
```

### Claude Desktop (`claude_desktop_config.json`)

```json
{
  "mcpServers": {
    "jevnav": {
      "command": "uvx",
      "args": [
        "jevnav"
      ],
      "env": {
        "TYPESAFE_API_KEY": "<YOUR_TYPESAFE_API_KEY>"
      }
    }
  }
}
```

### Codex

```sh
codex mcp add jevnav --env 'TYPESAFE_API_KEY=<YOUR_TYPESAFE_API_KEY>' -- uvx jevnav
```

### Codex config.toml (`~/.codex/config.toml`)

```toml
[mcp_servers.jevnav]
command = "uvx"
args = ["jevnav"]

[mcp_servers.jevnav.env]
TYPESAFE_API_KEY = "<YOUR_TYPESAFE_API_KEY>"
```

### Gemini CLI

```sh
gemini mcp add -s user -e 'TYPESAFE_API_KEY=<YOUR_TYPESAFE_API_KEY>' jevnav uvx -- jevnav
```

### Gemini settings.json (`~/.gemini/settings.json`)

```json
{
  "mcpServers": {
    "jevnav": {
      "command": "uvx",
      "args": [
        "jevnav"
      ],
      "env": {
        "TYPESAFE_API_KEY": "<YOUR_TYPESAFE_API_KEY>"
      }
    }
  }
}
```

## Environment variables

| Name | Required | Secret | Description |
|---|---|---|---|
| `TYPESAFE_API_KEY` | no | yes | TypeSafe API key for Jev decisions (optional if ~/.config/typesafe/apikey.txt exists) |
| `DEMO_PASSWORD` | no | no |  |

## FAQ

### Does jevnav require an API key for all operations?

No, while deciding actions requires a TypeSafe API key, tools like replay, diff, outline, and styles do not require a key.

### What information does jevnav provide about a web page?

It provides 'page truth' including structure, computed styles, and interactive controls without relying on screenshots.