Curl basic auth This guide covers the necessary cURL options and examples. We can also use cURL in PowerShell, but there are a few important things that you need to know. May 30, 2024 · Curl is a powerful command line tool for interacting with web servers. The PHP code was automatically generated for the Curl Basic Auth example. A similar problem arises if using environment variables with e. Sep 27, 2025 · Basic access authentication, often just called "Basic Auth," is a straightforward method for a client (like your cURL command) to provide a username and password when making an HTTP request. Without telling which method to use, curl defaults to Basic. To insecurely pass the --user option to curl: echo 'user = "defn:password"' | curl -K - https://googles To avoid generating the password on the command line, let's say the username:password pair is in a file readable only by the user: Learn how to fix authentication errors in cURL commands. curl_easy_setopt(curl, CURLOPT_PASSWORD, "secret"); That is all you need. Nov 6, 2010 · Some proxies won't authorize correctly with --proxy-anyauth, so ideally you'll want to specify the authentication method that your proxy uses. It is something the server requires. This guide provides easy steps and examples to get you started. Discover practical examples of basic authentication, bearer tokens, and cookie-based auth across different OS, plus troubleshooting tips for developers. Basic Authentication is a simple authentication scheme built into the HTTP protocol. When the server has a resource that is protected and requires authentication, it Jun 7, 2022 · Learn about curl authentication, curl client certificate, authentication headers, authenticate with a private key, jwt, and other examples. To send Basic Authentication credentials using cURL, you can use the -u or --user flag followed by the username and password separated by a colon Jan 23, 2017 · Authorization: Basic id:api_key or Authorization: Basic {id}:{api_key} I get the response "authentication parameter in the request are missing or invalid" but I have used proper id and api_key which is working in command line curl (I tested) Please help me. In this case, it is important to access Artifactory using the same user name provided when creating Jan 10, 2023 · The curl -u command is used to authorize a user using the HTTP basic authentication scheme that is built into the HTTP protocol. Here is a sample command that sends a GET request to our hosted version of HTTPBin with Basic Auth credentials: Feb 17, 2025 · Learn how to properly set cURL authorization headers for secure API authentication. May 28, 2025 · Integrating Basic Authentication with cURL provides a straightforward method for securing API interactions. This may be useful when you need a client (such as certain dependency managers) that only supports basic authentication to access Artifactory. While not the most secure method, it's still widely used for basic access control. OR this value together with a single specific auth value to force libcurl to probe for unrestricted auth and if not, only that single auth algorithm is acceptable. Organic, nutritious, and completely irresistible curl recipes that show you how to perform basic HTTP server authentication. Default CURLAUTH_BASIC Protocols This functionality affects http only Example int This example uses curl without basic auth to create an index: Jan 26, 2010 · This Stack Overflow page provides guidance on making HTTP requests with basic authentication in PHP using cURL. google. There are a lot of very old answers here, but this is the correct modern answer to use. Example 1: Implementation for making a request using HTTP basic authentication with PHP curl. To send Basic Auth credentials using cURL you need to use the -u option with "login:password" where "login" and "password" are your credentials. Simple explanations, practical tips, and solutions for everyone - master curl basic auth easily. What I am using at the moment is the following: 本文介绍了在 cURL 命令中设置 Authorization(Basic Auth 和 Bearer Token)的方法，Basic Auth 可以通过-u选项来设置，Bearer Token可以通过-H选项来设置。 Dec 14, 2017 · Bitbucket Data Center allows REST clients to authenticate themselves with a user name and password using basic authentication. It is separate from the server authentication to allow Nov 30, 2023 · To send basic auth credentials with Curl, use the "-u login: password" command-line option. May 11, 2024 · Learn how to set up and test Basic Auth with cURL, troubleshoot common issues, and ensure secure API communication. The HTTP POST needs to perform a Basic Authentication, include a field and send a file in multi part. Simple example Most client software provides a simple mechanism for supplying a user name and password and will build the required authentication headers automatically. Authentication required A client does not itself decide that it wants to send an authenticated request. Apr 8, 2012 · How do I include special characters like @ and & in the cURL POST data? I'm trying to pass a name and password like: curl -d name=john passwd=@31&3*J https://www Learn how to use basic authentication with PowerShell's Invoke-RestMethod cmdlet. Dec 8, 2022 · In this Basic Server Authentication example, we send a GET request to the ReqBin echo URL with user credentials. Click Run to I'm learning Apigility (Apigility docu -> REST Service Tutorial) and trying to send a POST request with basic authentication via cURL: $ curl -X POST -i -H "Content-Type: application/hal+json" -H " May 3, 2024 · The Basic authentication used in HTTP (which is the type curl uses by default) is plain text based, which means it sends username and password only slightly obfuscated, but still fully readable by anyone that sniffs on the network between you and the remote server. Dec 11, 2023 · Sending Curl POST Request with Basic Authentication To send a POST request with basic authentication credentials with Curl, you need to use the --user "login: password" command-li Apr 16, 2024 · To send Basic Auth credentials using cURL you need to use the -u option with "login:password" where "login" and "password" are your credentials. The Curl/Bash code was automatically generated for the GET Request Basic Server Authentication example. Basic Authentication Basic Authentication sends credentials in the HTTP header as a base64-encoded string. Nov 30, 2023 · To send basic auth credentials with Curl, use the "-u login: password" command-line option. Here's a comprehensive guide to the most common authentication types you'll encounter. This makes libcurl switch on its default authentication method for this transfer: HTTP Basic. The user's credentials are automatically converted by Curl to a Base64 encoded string and passed to the server with an Authorization: Basic [token] header. Master Basic Authentication with cURL, enhanced by advanced proxy solutions for secure, efficient data access and anonymity in your scraping tasks. If you run curl -v -U user:pass -x proxy:port --url http://www. See examples, options and explanations of how curl handles authentication headers and codes. Click Send to execute GET Request with the Basic Server Authentication credentials online and see the results. To use basic auth, include the --user username:password option in your curl command Mar 13, 2024 · Learn how to set basic authentication, bearer tokens, and cookie authentication with cURL through a step-by-step guide. Feb 21, 2024 · Basic authentication and authorization in cURL Basic authentication is a simple HTTP authentication mechanism where the client transmits a username and password in plain text, encoded with Base64, in the Authorization header. Provide a credential object and specify -Authentication Basic for easy basic Auth in PowerShell. Learn how to implement basic authentication using cURL for web scraping. POST data is passed to Curl with the -d option. Feb 19, 2022 · PHP cURL Basic Authentication Example There are two methods to do using using PHP and cURL, one is use CURLOPT_USERPWD and second is to send credentials via header. Learn how to use curl to make authenticated HTTP requests with different methods, such as Basic, Digest, Negotiate and NTLM. g. Follow our step-by-step guide and secure your REST API requests. Sep 17, 2020 · My username is user1 and password is mypass8@ I wish to pass this username and password to curl command. Learn how to implement HTTP Basic Authentication using cURL in PHP for secure REST API requests. Dec 11, 2023 · To send a POST request with basic authentication credentials with Curl, you need to use the --user "login: password" command-line option. Also, learn how to handle colon in username and Base64 encoding. Apr 28, 2025 · Using curl_setopt () Function The curl_setopt () function empowers developers to tailor and enhance cURL sessions, ensuring resilient authentication mechanisms and robust communication between applications and APIs. If a redirect takes curl to a different host, it does not get the credentials passed on. cURL provides several methods to handle basic authentication, making it an essential tool for developers working with authenticated web services. And PowerShell also has it’s own methods to transfer data to and To make scripted clients (such as wget) invoke operations that require authorization (such as scheduling a build), use HTTP BASIC authentication to specify the user name and the API token. The most common type of authentication used with cURL is basic HTTP authentication, which transmits usernames and passwords unencrypted but encoded with base64. A reference token can be used instead of a password for basic authentication. May 23, 2025 · Master Curl auth in 2025: Learn basic auth, bearer tokens, PHP Curl headers, and best practices for secure API calls with real-world examples. Learn how to use basic authentication with cURL to access services without token-based schemes. CURLAUTH_AWS_SIGV4 provides AWS V4 signature authentication on HTTPS header see CURLOPT_AWS_SIGV4. Dec 13, 2022 · In this article, we will take a look at how to do basic authentication using cURL HTTP requests with examples. In this Curl request with Basic Auth Credentials example, we send a request with basic authorization credentials to the ReqBin echo URL. How to Use cURL with Basic Authentication HTTP Basic Authentication is one of the most common authentication mechanisms used by web APIs and protected resources. Nov 14, 2024 · The command-line tool cURL (client URL) is commonly used to send or receive data to a server. To tell curl to use a user and password for authentication: Dec 16, 2024 · Find out how you can use cURL to authenticate for login screens, APIs, and other interaction points. See how to encode credentials, store them in a file, and secure them from exposure. com, you should get something along the lines of the following: Jul 6, 2018 · $ ls -l admin* -rw-r--r-- 1 chris chris 12 Jul 6 09:16 admin-credentials -rw-r--r-- 1 chris chris 13 Jul 6 09:16 admin-credentials-eol $ wc admin-credentials 0 1 12 admin-credentials $ wc admin-credentials-eol 1 1 13 admin-credentials-eol $ xxd admin-credentials 00000000: 6164 6d69 6e3a 3132 3334 3536 admin:123456 $ xxd admin-credentials-eol 00000000: 6164 6d69 6e3a 3132 3334 3536 0a admin:123456. The -u or --user option can be used to include a username and password in the request. This curl method keeps credentials out of the history and process status, but leaves username and password in cleartext in the my-password-file creating another attack vector - worse than than having info in the history file: bash, for example, automatically restricts permissions of the history file. Authentication for proxies is similar to "normal" HTTP authentication. Behind the scenes curl builds the Authorization header with base64 encoded credentials for you. Use cURL basic auth to safely transmit credentials and interact with protected endpoints. By understanding the underlying mechanics and adhering to best practices, developers can ensure secure and efficient communication with web services. Feb 5, 2021 · Fortunately, curl lets you configure command line options through stdin. org This way you can store the user and password (UserName\WithSlash:PasswordWithExclamation!) without any escaping in the credentials file you pass to the base64 command. The tool’s advantage is that it supports multiple protocols and offers features like authentication, proxy, transfer resume, and more. The Python code was automatically generated for the Curl Basic Auth example. Aug 27, 2013 · curl -v --basic --user USERNAME:PASSWORD how would I set this as a header in a different REST client? I can create curl commands in php, but in other GUI based rest clients I am unsure what part of the rest call "basic authentication" really falls in, is it in the body? in a header structured a certain way? thanks for the insight Proxy authentication HTTP and SOCKS proxies can require authentication, so curl then needs to provide the proper credentials to the proxy to be allowed to use it. . Mar 31, 2017 · I am trying to make an HTTP POST using libcurl. Oct 14, 2024 · A foundation for basic authentication using a username and password where whether you are integrating with web services, testing APIs, or accessing web resources, cURL provides a simple, efficient way to do so. When authentication is used, or when sending a cookie with "-H Cookie:", curl only sends its credentials to the initial host. Feb 1, 2024 · Learn how to perform a Basic Access Authentication with cURL and how to secure your credentials using a netrc file. Example: Feb 6, 2021 · Learn how to use Basic Auth with curl in two ways: passing credentials to curl command or passing Authorization header. Curl automatically converts the login: password pair into a Base64-encoded string and adds the "Authorization: Basic [token]" header to the request. Curl converts the provided user authentication data into a standard Authorization: Basic {base64string} HTTP header and sends it to the server along with the other data in your request. How to Handle Authentication with Curl Curl supports multiple authentication methods for accessing protected resources. How do i escape the @ in the password when passing it to curl command ? curl -k -X POST http Let's say access to this page require basic authentication (username/password). For example you can specify the -u argument with curl as follows HTTP offers many different methods of authentication and curl supports several: Basic, Digest, NTLM and Negotiate (SPNEGO). This tutorial explains how to send HTTP Basic Authentication credentials with a Curl. Oct 14, 2025 · Learn how to use curl basic auth in Laravel step-by-step. a script to set the username Curl is particularly useful for working with APIs and web services, providing flexibility and simplicity for different types of requests, including those requiring basic authentication. One of the common tasks you might need to perform is sending Basic Authentication credentials. Click Run to execute the Curl Basic Authentication Credentials Example online and see the results. Solutions for Basic Auth, OAuth, API keys, and other common authentication problems. curl --header "Authorization: Basic $(base64 --wrap=0 credentials)" https://example. Failing to do so (or providing the wrong credentials) makes the proxy return HTTP responses using code 407. Feb 1, 2024 · Using cURL to include authentication credentials like API keys, basic auth credentials, bearer tokens, and custom headers is essential for secure and effective API communication. Dec 27, 2013 · How do I set up the basic authorization? All you need to do is use -u, --user USER[:PASSWORD]. Nov 30, 2023 · In this Curl request with Basic Auth Credentials example, we send a request with basic authorization credentials to the ReqBin echo URL.