1<!-- Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. --> 2<!-- SPDX-License-Identifier: curl --> 3# PROTOCOLS 4curl supports numerous protocols, or put in URL terms: schemes. Your 5particular build may not support them all. 6## DICT 7Lets you lookup words using online dictionaries. 8## FILE 9Read or write local files. curl does not support accessing file:// URL 10remotely, but when running on Microsoft Windows using the native UNC approach 11works. 12## FTP(S) 13curl supports the File Transfer Protocol with a lot of tweaks and levers. With 14or without using TLS. 15## GOPHER(S) 16Retrieve files. 17## HTTP(S) 18curl supports HTTP with numerous options and variations. It can speak HTTP 19version 0.9, 1.0, 1.1, 2 and 3 depending on build options and the correct 20command line options. 21## IMAP(S) 22Using the mail reading protocol, curl can download emails for you. With or 23without using TLS. 24## LDAP(S) 25curl can do directory lookups for you, with or without TLS. 26## MQTT 27curl supports MQTT version 3. Downloading over MQTT equals subscribe to a 28topic while uploading/posting equals publish on a topic. MQTT over TLS is not 29supported (yet). 30## POP3(S) 31Downloading from a pop3 server means getting a mail. With or without using 32TLS. 33## RTMP(S) 34The **Realtime Messaging Protocol** is primarily used to serve streaming media 35and curl can download it. 36## RTSP 37curl supports RTSP 1.0 downloads. 38## SCP 39curl supports SSH version 2 scp transfers. 40## SFTP 41curl supports SFTP (draft 5) done over SSH version 2. 42## SMB(S) 43curl supports SMB version 1 for upload and download. 44## SMTP(S) 45Uploading contents to an SMTP server means sending an email. With or without 46TLS. 47## TELNET 48Fetching a telnet URL starts an interactive session where it sends what it 49reads on stdin and outputs what the server sends it. 50## TFTP 51curl can do TFTP downloads and uploads. 52## WS(S) 53WebSocket done over HTTP/1. WSS implies that it works over HTTPS. 54
