# Configuring a cURL Proxy By [MoMo Residential Proxy Online](https://paragraph.com/@momo-residential-proxy-online) · 2024-04-09 --- When integrating cURL with proxy services, you must first access the proxy. The syntax for the **cURL proxy** URL is structured as follows: `[://][:]@[:]` This includes: * ``: The protocol for connecting to the proxy server. If unspecified, cURL defaults to `http://`. * ``: The IP address or URL required for the proxy server hostname. * ``: The port number the proxy server is listening on. If unspecified, cURL defaults to using port `1080`. * ``: An optional username required for authentication. * ``: An optional password required for authentication. The most commonly used cURL proxy protocols are HTTP and HTTPS, followed by SOCKS. For instance, if your proxy server's IP address is `192.168.1.1` and operates on port `8080`, the command would be: `curl -x http://192.168.1.1:8080 http://example.com` This command directs cURL to route the request for `http://example.com` through the proxy server `192.168.1.1` on port `8080`. Managing Proxy Authentication Some proxy servers require a username and password for authentication. cURL supports proxy authentication, allowing web scrapers to access these proxy servers while adhering to their security measures. To connect to a proxy server with authentication, use the `--proxy-user` option to provide the username and password: `curl --proxy http://proxy-url.com:8080 --proxy-user user:pass http://target-url.com/api` This command verifies the provided username and password with the proxy server to send the HTTP request to the target URL through the specified proxy. Additionally, include a proxy-authorized title in the request header using the `--proxy-header` option: `curl --proxy http://proxy-url.com:8080 --proxy-user user:pass --proxy-header "Proxy-Authorization: Basic dXNlcjEyMzpwYXNzMTIz" http://target-url.com/api` This command instructs cURL to use the specified username and password for authentication with the proxy server. Using Environment Variables for Proxies For regular usage of a **cURL proxy**, setting it as an environment variable can be more convenient. cURL allows the use of environment variables for each supported protocol. For instance, if `http_proxy` and `https_proxy` are set, cURL will automatically use them for the appropriate protocol: `export http_proxy=http://192.168.1.1:8080 export https_proxy=http://192.168.1.1:8080` You can also include authentication if necessary: `export http_proxy=http://username:password@192.168.1.1:8080 export https_proxy=http:///username:password@192.168.1.1:8080` …… More can read: --- *Originally published on [MoMo Residential Proxy Online](https://paragraph.com/@momo-residential-proxy-online/configuring-a-curl-proxy)*