$ cat query.json
{"foo": "bar"}
$ curl -X POST -H "Content-Type: application/json" -H "Accept: application/json" https://httpbin.org/post --data-binary @query.json
{
"args": {},
"data": "{\"foo\": \"bar\"}\n",
"files": {},
"form": {},
"headers": {
"Accept": "application/json",
"Content-Length": "15",
"Content-Type": "application/json",
"Host": "httpbin.org",
"User-Agent": "curl/8.7.1",
"X-Amzn-Trace-Id": "Root=1-67fbcfb6-417ccb074ddf1ed41b114fa6"
},
"json": {
"foo": "bar"
},
"origin": "181.94.226.181",
"url": "https://httpbin.org/post"
}