### Install Dependencies, Build, and Test

Source: https://github.com/griffithsbs/envmcp/blob/main/CONTRIBUTING.md

Standard commands to set up the development environment, build the project, and run tests.

```bash
npm install

npm run build

npm test
```

--------------------------------

### Environment File Format Example

Source: https://github.com/griffithsbs/envmcp/blob/main/README.md

Demonstrates the key-value pair format for environment variables, including comments and values with spaces.

```dotenv
DATABASE_URL=postgresql://user:password@localhost/db
API_KEY=your-secret-api-key
# This is a comment
QUOTED_VALUE="value with spaces"
```

--------------------------------

### Quick Start: Using Default .env.mcp

Source: https://github.com/griffithsbs/envmcp/blob/main/README.md

Execute an MCP server command using environment variables defined in the default ~/.env.mcp file.

```bash
# Use default ~/.env.mcp file
npx envmcp your-mcp-server $DATABASE_URL
```

--------------------------------

### Install envmcp Globally

Source: https://github.com/griffithsbs/envmcp/blob/main/README.md

Install the envmcp package globally using npm to make the command-line tool available system-wide.

```bash
npm install -g envmcp
```

--------------------------------

### MCP Client Configuration: Before envmcp

Source: https://github.com/griffithsbs/envmcp/blob/main/README.md

Example of an MCP client configuration where sensitive database credentials are directly exposed in the command arguments.

```json
{
  "my_database": {
    "command": "my-mcp-server",
    "args": ["postgresql://user:password@hostname/db"]
  }
}
```

--------------------------------

### Quick Start: Specifying a Custom Environment File

Source: https://github.com/griffithsbs/envmcp/blob/main/README.md

Execute an MCP server command using environment variables from a custom-specified .env file.

```bash
# Specify custom env file
npx envmcp --env-file .env your-mcp-server $API_KEY $DATABASE_URL
```

--------------------------------

### MCP Client Configuration: After envmcp

Source: https://github.com/griffithsbs/envmcp/blob/main/README.md

Example of an MCP client configuration updated to use envmcp, referencing environment variables for sensitive information.

```json
{
  "my_database": {
    "command": "npx",
    "args": ["envmcp", "my-mcp-server", "$DATABASE_URL"]
  }
}
```

--------------------------------

### Quick Start: Using Short Flag for Custom Environment File

Source: https://github.com/griffithsbs/envmcp/blob/main/README.md

Execute an MCP server command using environment variables from a custom-specified .env file, utilizing the short flag `-e`.

```bash
# Short flag version
npx envmcp -e /path/to/secrets.env your-mcp-server $MY_SECRET
```

--------------------------------

### Link Local Build and Test Environment Variable Substitution

Source: https://github.com/griffithsbs/envmcp/blob/main/CONTRIBUTING.md

Steps to link a local build of envmcp and test its functionality with environment variable substitution.

```bash
npm run build
npm link

# Create a test env file
echo "TEST_VAR=hello world" > test.env

# Test with environment variable substitution
envmcp --env-file test.env echo '$TEST_VAR'

# Unlink when done
npm unlink -g envmcp
```

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