url

url(URL, format, structure) - returns a table created from the URL with given
format and structure.

URL - HTTP or HTTPS server address, which can accept GET and/or POST requests.

format - format of the data.

structure - table structure in 'UserID UInt64, Name String' format. Determines column names and types.

Example

-- getting the first 3 lines of a table that contains columns of String and UInt32 type from HTTP-server which answers in CSV format.
SELECT * FROM url('http://127.0.0.1:12345/', CSV, 'column1 String, column2 UInt32') LIMIT 3

Original article