# Application

| Environment variable | Description |
|:---:|---|
| `AUTO_ADD_TO_CART` | Enable auto add to cart on support stores, default: `true` |
| `BROWSER_TRUSTED` | Skip Chromium Sandbox. Useful for containerized environments, default: `false` |
| `HEADLESS` | Puppeteer to run headless or not. Debugging related, default: `true` |
| `INCOGNITO` | Puppeteer to run incognito or not. Debugging related, default: `false` |
| `IN_STOCK_WAIT_TIME` | Time to wait between requests to the same link if it has that card in stock. In seconds, default: `0` |
| `LOG_LEVEL` | [Logging levels](https://github.com/winstonjs/winston#logging-levels). Debugging related, default: `info` |
| `LOW_BANDWIDTH` | Blocks images/fonts to reduce traffic. Disables ad blocker, default: `false` |
| `OPEN_BROWSER` | Toggle for whether or not the browser should open when item is found. Default: `true` |
| `PAGE_BACKOFF_MIN` | Minimum backoff time between retrying requests for the same store when a forbidden response is received. Default: `10000` |
| `PAGE_BACKOFF_MAX` | Maximum backoff time between retrying requests for the same store when a forbidden response is received. Default: `3600000` |
| `PAGE_SLEEP_MIN` | Minimum sleep time between queries of the same product page. In milliseconds, default: `5000` |
| `PAGE_SLEEP_MAX` | Maximum sleep time between queries of the same product page. In milliseconds, default: `10000` |
| `PAGE_TIMEOUT` | Navigation Timeout in milliseconds. `0` for infinite, default: `30000` |
| `PROXY_PROTOCOL` | protocol of proxy server, such as `socks5`. Default: `http` |
| `PROXY_ADDRESS` | IP Address or fqdn of proxy server |
| `PROXY_PORT` | TCP Port number on which the proxy is listening for connections. Default: `80` |
| `SCREENSHOT` | Capture screenshot of page if a card is found. Default: `true` |
| `USER_AGENT` | Custom User-Agents headers for HTTP requests. Newline separated, e.g.: `USER_AGENT_STRING1 \n USER_AGENT_STRING2`. Default: `Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36` |
| `WEB_PORT` | Starts a webserver to be able to control the bot while it is running. Setting this value starts this service. Default: `` |

???+ note
    You can find your computer's user agent by [searching google for "my user agent"](http://google.com/search?q=my+user+agent)

???+ tip
    Data usage is [known to be high](https://github.com/jef/streetmerchant/issues?q=is%3Aissue+sort%3Aupdated-desc+bandwidth). This is expected as the program scrapes many websites in parallel 24/7. To help reduce this, use `LOW_BANDWIDTH="true"`. We are looking into other solutions as well, but is low priority.