curl --request POST \
  --url https://api.zapier.com/v2/actions/{action_id}/inputs \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "data": {
    "authentication": "928117",
    "inputs": {
      "spreadsheet": "my_sheet"
    }
  }
}
'

import requests

url = "https://api.zapier.com/v2/actions/{action_id}/inputs"

payload = { "data": {
        "authentication": "928117",
        "inputs": { "spreadsheet": "my_sheet" }
    } }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({data: {authentication: '928117', inputs: {spreadsheet: 'my_sheet'}}})
};

fetch('https://api.zapier.com/v2/actions/{action_id}/inputs', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.zapier.com/v2/actions/{action_id}/inputs",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'data' => [
        'authentication' => '928117',
        'inputs' => [
                'spreadsheet' => 'my_sheet'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.zapier.com/v2/actions/{action_id}/inputs"

	payload := strings.NewReader("{\n  \"data\": {\n    \"authentication\": \"928117\",\n    \"inputs\": {\n      \"spreadsheet\": \"my_sheet\"\n    }\n  }\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.zapier.com/v2/actions/{action_id}/inputs")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"data\": {\n    \"authentication\": \"928117\",\n    \"inputs\": {\n      \"spreadsheet\": \"my_sheet\"\n    }\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.zapier.com/v2/actions/{action_id}/inputs")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"data\": {\n    \"authentication\": \"928117\",\n    \"inputs\": {\n      \"spreadsheet\": \"my_sheet\"\n    }\n  }\n}"

response = http.request(request)
puts response.read_body

{
  "links": {
    "next": null,
    "prev": null
  },
  "meta": {
    "count": 2,
    "limit": null,
    "offset": 0
  },
  "data": [
    {
      "type": "input_field",
      "id": "input",
      "default_value": "",
      "depends_on": [],
      "description": "Use the Input Data fields above to assign key names (left) and map values (right) from previous steps. Use notation `inputData.keyName` or `inputData['keyName']` to access the values within your code. The data will be provided **as strings**. Learn more [here](https://zapier.com/help/create/code-webhooks/use-javascript-code-in-zaps#input-data-for-code-steps).",
      "invalidates_input_fields": false,
      "is_required": false,
      "placeholder": "",
      "title": "Input Data",
      "value_type": "OBJECT"
    },
    {
      "type": "input_field",
      "id": "code",
      "default_value": "// this is wrapped in an `async` function\n// you can use await throughout the function\n\noutput = [{id: 123, hello: \"world\"}];",
      "depends_on": [],
      "description": "**Warning! This is an advanced action!** Uses Node 10.x.x. Please read the [Code documentation for more information](/help/create/code-webhooks/use-javascript-code-in-zaps).",
      "format": "CODE",
      "invalidates_input_fields": false,
      "is_required": true,
      "placeholder": "",
      "title": "Code",
      "value_type": "STRING"
    }
  ]
}

{
  "errors": [
    {
      "status": 400,
      "code": "parse_error",
      "title": "ParseError",
      "detail": "Malformed request.",
      "source": null,
      "meta": {
        "source": "ZAPIER",
        "full_details": {
          "message": "Malformed request.",
          "code": "parse_error"
        }
      }
    }
  ]
}

{
  "errors": [
    {
      "status": 123,
      "code": "<string>",
      "title": "<string>",
      "detail": "<string>",
      "source": {
        "pointer": "<string>",
        "parameter": "<string>",
        "header": "<string>"
      },
      "meta": {}
    }
  ]
}

{
  "errors": [
    {
      "status": 123,
      "code": "<string>",
      "title": "<string>",
      "detail": "<string>",
      "source": {
        "pointer": "<string>",
        "parameter": "<string>",
        "header": "<string>"
      },
      "meta": {}
    }
  ]
}

{
  "errors": [
    {
      "status": 123,
      "code": "<string>",
      "title": "<string>",
      "detail": "<string>",
      "source": {
        "pointer": "<string>",
        "parameter": "<string>",
        "header": "<string>"
      },
      "meta": {}
    }
  ]
}

{
  "errors": [
    {
      "status": 123,
      "code": "<string>",
      "title": "<string>",
      "detail": "<string>",
      "source": {
        "pointer": "<string>",
        "parameter": "<string>",
        "header": "<string>"
      },
      "meta": {}
    }
  ]
}

{
  "errors": [
    {
      "status": 500,
      "code": "error",
      "title": "APIException",
      "detail": "A server error occurred.",
      "source": null,
      "meta": {
        "source": "ZAPIER",
        "full_details": {
          "message": "A server error occurred.",
          "code": "error"
        }
      }
    }
  ]
}

{
  "errors": [
    {
      "status": 123,
      "code": "<string>",
      "title": "<string>",
      "detail": "<string>",
      "source": {
        "pointer": "<string>",
        "parameter": "<string>",
        "header": "<string>"
      },
      "meta": {}
    }
  ]
}

{
  "errors": [
    {
      "status": 123,
      "code": "<string>",
      "title": "<string>",
      "detail": "<string>",
      "source": {
        "pointer": "<string>",
        "parameter": "<string>",
        "header": "<string>"
      },
      "meta": {}
    }
  ]
}