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Bash - send HTTP POST request with JSON body using curl

13 points
Created by:
Mark-Rotteveel
477

In this short article, we would like to show how to send HTTP POST request with JSON body/payload using curl under Bash.

Quick solution:

echo '{"name":"john"}' | curl -X POST -H "Content-Type: application/json" -d @- http://localhost:80/path/to/rest/api

to untrusted HTTPS server:

echo '{"name":"john"}' | curl -k -X POST -H "Content-Type: application/json" -d @- https://localhost:443/path/to/rest/api

Where:

  • -k lets¬†to request servers with¬†untrusted¬†certificates (e.g. localhost),
  • -X POST indicates request method,
  • -H "Content-Type: application/json" informs server¬†API about sent content type,
  • -d @- lets to use stdin¬†and send them JSON data¬†(-d @- is shortcut for --data-binary @-).

 

Alternative solution

We can send JSON payload from indicated file using:

curl -X POST -H "Content-Type: application/json" -d @/path/to/data.json http://localhost:80/path/to/rest/api

Where:

  • -d @/path/to/data.json indicates a file that contains¬†JSON to send inside the body of the POST request.

Example /path/to/data.json file content:

{
    "name": "john"
}

Alternative titles

  1. Bash - send HTTP POST request with JSON payload using curl
  2. cURL - send HTTP POST request with JSON body
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