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curl POST examples

Common Options

-#, --progress-bar Make curl display a simple progress bar instead of the more informational standard meter.

-b, --cookie <name=data> Supply cookie with request. If no =, then specifies the cookie file to use (see -c).

-c, --cookie-jar <file name> File to save response cookies to.

-d, --data <data> Send specified data in POST request. Details provided below.

-f, --fail Fail silently (don't output HTML error form if returned).

-F, --form <name=content> Submit form data.

-H, --header <header> Headers to supply with request.

-i, --include Include HTTP headers in the output.

-I, --head Fetch headers only.

-k, --insecure Allow insecure connections to succeed.

-L, --location Follow redirects.

-o, --output <file> Write output to . Can use --create-dirs in conjunction with this to create any directories specified in the -o path.

-O, --remote-name Write output to file named like the remote file (only writes to current directory).

-s, --silent Silent (quiet) mode. Use with -S to force it to show errors.

-v, --verbose Provide more information (useful for debugging).

-w, --write-out <format> Make curl display information on stdout after a completed transfer. See man page for more details on available variables. Convenient way to force curl to append a newline to output: -w "\n" (can add to ~/.curlrc).

-X, --request The request method to use.


When sending data via a POST or PUT request, two common formats (specified via the Content-Type header) are:

  • application/json
  • application/x-www-form-urlencoded

Many APIs will accept both formats, so if you're using curl at the command line, it can be a bit easier to use the form urlencoded format instead of json because

  • the json format requires a bunch of extra quoting
  • curl will send form urlencoded by default, so for json the Content-Type header must be explicitly set

This gist provides examples for using both formats, including how to use sample data files in either format with your curl requests.

curl usage

For sending data with POST and PUT requests, these are common curl options:

  • request type

    • -X POST
    • -X PUT
  • content type header

  • -H "Content-Type: application/x-www-form-urlencoded"

  • -H "Content-Type: application/json"

  • data

    • form urlencoded: -d "param1=value1&param2=value2" or -d @data.txt
    • json: -d '{"key1":"value1", "key2":"value2"}' or -d @data.json


POST application/x-www-form-urlencoded

application/x-www-form-urlencoded is the default:

curl -d "param1=value1&param2=value2" -X POST http://localhost:3000/data


curl -d "param1=value1&param2=value2" -H "Content-Type: application/x-www-form-urlencoded" -X POST http://localhost:3000/data

with a data file

curl -d "@data.txt" -X POST http://localhost:3000/data

POST application/json

curl -d '{"key1":"value1", "key2":"value2"}' -H "Content-Type: application/json" -X POST http://localhost:3000/data

with a data file

curl -d "@data.json" -X POST http://localhost:3000/data
"name": "postdemo",
"version": "1.0.0",
"scripts": {
"start": "node server.js"
"dependencies": {
"body-parser": "^1.15.0",
"express": "^4.13.4"
var app = require('express')();
var bodyParser = require('body-parser');
app.use(bodyParser.json()); // for parsing application/json
app.use(bodyParser.urlencoded({ extended: true })); // for parsing application/x-www-form-urlencoded'/data', function (req, res) {
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Very helpful. Thank you.

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gsharew commented Apr 8, 2021

You saved every one here except one 1 or 2 persons.

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ghost commented Jul 21, 2021

If you pass -d option then -X POST is not needed because -d implies -X POST. Could you simplify your examples?

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ziyoung commented Jul 27, 2021

curl also supports custom dns resolver. Use --resolve to specify target of this request.

curl --resolve

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Very helpful!! Thanks!

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was very helpful tyvm

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thanks to you i finally understand differences between curl and web browser and http request in each one

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This is great. Succinct. To the point. Thanks!

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SPARKILATOR commented Nov 23, 2021

Please help with this query.

suppose we have a curl command where we have directed some data query to certain proxy using POST request like for example

curl -X POST -d "validFor=10&organizationName=thecomapnyofyorkshireandleicestershireandenglishcricketboardandutility" -H 'X-HTTP-Proxy-To:'

for this command, we are getting error "string too long" so got to know that organisationName is too long and when we are reducing the organisation name length to 60 or less than 60 then it is working fine so is there any limitation related to curl or some other factors are involved via which we can face this issue.?

Please Help.

Thank U.

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I am more so interested on that organisationName factor whether we are allowed to enter multiple characters in that or it is limited to certain characters and if some documentation is there related to this then it will be great.

Thank U.

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PLViet commented May 3, 2022

Can someone help me with this?

curl -X 'POST'
-H 'accept: /'
-H 'api-token: eyJpdiI6IjZuMnc0YkZTamgvYXl4QlZiOHU3R3c9PSIsInZhbHVlIjoiQUFlUDk4azJ6SVQ5d2VuUU50V096dHgzUndabjl6UHhQa0Y3eGVqcHg1RzdNSW9xdHhLR0JVVHZtNHg5VEN2ViIsIm1hYyI6ImM4NGJjNTYzYjkzZjk2MDczOGY1MDc5NDYyYTIzNzcwYzMxNDA1OTI4MDRkYWRhMTY4ZTc1OTg4ZDdmNjE1MjUiLCJ0YWciOiIifQ=='
-d ''

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I want to know how i can get the response of this Curl ?
curl -d "" -H "Content-Type: application/x-www-form-urlencoded" -X POST http://localhost:3000/data

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gsharew commented Jun 8, 2022 via email

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Anyone have tried with POST Method with body having form-data with zip file upload ?

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Thanks for the short and detail article

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The -X flag specifies a custom request method to use when communicating with the HTTP server. By default, the GET method is used unless some other method is specified. thank you!!! @slope unblocked

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Very helpful, thank you so much.

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If you pass -d option then -X POST is not needed because -d implies -X POST. Could you simplify your examples?

Technically other HTTP verbs can have data too. Even GET, though discouraged and implementation-dependent to be recognized or passed by transport like proxies.

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Awesome! Thanks!

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Great examples, thank you!

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Thank you! Helped me figure out a call I was trying to make. Bookmarked

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Good work, thank you!

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hgjkim commented Aug 4, 2023

SUPER Thanks!

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mfyuce commented Nov 15, 2023


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Sending HTTP requests to using curl maybe helpful

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Robson-pds commented Dec 15, 2023

Para Windows 11, passando json ficou:
curl -X POST %url% -H "Content-Type: application/json" -H "Authorization: Bearer %token%" -d "{\"number\":\"%number%\",\"body\":\"%body%\"}" nota que o que esta dentro do %% são variaveis .bat. tem que passar o conteudo do json com o \" porque o windows interpreta de maneira distinta as aspas.

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a really perfect cheatsheet

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How do you send a http POST with both a message body and URL parameters?

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curl '' -d 'This is my body content'
Use double quotes (") on Windows

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johnmahugu commented Jul 16, 2024 via email

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jimklimov commented Jul 16, 2024 via email

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