curl --request POST \
  --url https://api.iotools.cloud/v1/tool/3-way-text-diff-merge-viewer \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "baseText": "Line1\nLine2\nLine3",
  "localText": "Line1\nLine2 changed by local\nLine3 local edit",
  "remoteText": "Line1\nLine2\nLine3 remote edit\nLine4",
  "conflictStrategy": "markers"
}
'

import requests

url = "https://api.iotools.cloud/v1/tool/3-way-text-diff-merge-viewer"

payload = {
    "baseText": "Line1
Line2
Line3",
    "localText": "Line1
Line2 changed by local
Line3 local edit",
    "remoteText": "Line1
Line2
Line3 remote edit
Line4",
    "conflictStrategy": "markers"
}
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({
    baseText: 'Line1\nLine2\nLine3',
    localText: 'Line1\nLine2 changed by local\nLine3 local edit',
    remoteText: 'Line1\nLine2\nLine3 remote edit\nLine4',
    conflictStrategy: 'markers'
  })
};

fetch('https://api.iotools.cloud/v1/tool/3-way-text-diff-merge-viewer', 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.iotools.cloud/v1/tool/3-way-text-diff-merge-viewer",
  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([
    'baseText' => 'Line1
Line2
Line3',
    'localText' => 'Line1
Line2 changed by local
Line3 local edit',
    'remoteText' => 'Line1
Line2
Line3 remote edit
Line4',
    'conflictStrategy' => 'markers'
  ]),
  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.iotools.cloud/v1/tool/3-way-text-diff-merge-viewer"

	payload := strings.NewReader("{\n  \"baseText\": \"Line1\\nLine2\\nLine3\",\n  \"localText\": \"Line1\\nLine2 changed by local\\nLine3 local edit\",\n  \"remoteText\": \"Line1\\nLine2\\nLine3 remote edit\\nLine4\",\n  \"conflictStrategy\": \"markers\"\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.iotools.cloud/v1/tool/3-way-text-diff-merge-viewer")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"baseText\": \"Line1\\nLine2\\nLine3\",\n  \"localText\": \"Line1\\nLine2 changed by local\\nLine3 local edit\",\n  \"remoteText\": \"Line1\\nLine2\\nLine3 remote edit\\nLine4\",\n  \"conflictStrategy\": \"markers\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.iotools.cloud/v1/tool/3-way-text-diff-merge-viewer")

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  \"baseText\": \"Line1\\nLine2\\nLine3\",\n  \"localText\": \"Line1\\nLine2 changed by local\\nLine3 local edit\",\n  \"remoteText\": \"Line1\\nLine2\\nLine3 remote edit\\nLine4\",\n  \"conflictStrategy\": \"markers\"\n}"

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

{
  "tool": "3-way-text-diff-merge-viewer",
  "tool_version": "1.0.1",
  "outputs": {
    "mergedText": "Line1\n<<<<<<< LOCAL\nLine2 changed by local\nLine3 local edit\n||||||| BASE\nLine2\nLine3\n=======\nLine2\nLine3 remote edit\nLine4\n>>>>>>> REMOTE",
    "summary": [
      {
        "metric": "Unchanged lines",
        "value": "1"
      },
      {
        "metric": "Local-only changes",
        "value": "0"
      },
      {
        "metric": "Remote-only changes",
        "value": "0"
      },
      {
        "metric": "Changed identically in both",
        "value": "0"
      },
      {
        "metric": "Conflicting lines",
        "value": "3"
      },
      {
        "metric": "Conflicts",
        "value": "1"
      },
      {
        "metric": "Result",
        "value": "1 conflict — resolve before finalizing"
      }
    ],
    "diffTable": [
      {
        "status": "Unchanged",
        "base": "Line1",
        "local": "Line1",
        "remote": "Line1"
      },
      {
        "status": "Conflict",
        "base": "Line2\nLine3",
        "local": "Line2 changed by local\nLine3 local edit",
        "remote": "Line2\nLine3 remote edit\nLine4"
      }
    ]
  },
  "credits_used": 3,
  "credits_remaining": null
}

{
  "type": "https://iotools.cloud/docs/errors/validation_error",
  "title": "Invalid request",
  "status": 400,
  "code": "validation_error",
  "detail": "One or more inputs are invalid — see `fields`.",
  "request_id": "e4042b29-8f1e-4c7a-9b52-6f0d1a3c7e11",
  "fields": {
    "inputString": "Required"
  }
}

{
  "type": "https://iotools.cloud/docs/errors/invalid_api_key",
  "title": "Invalid API key",
  "status": 401,
  "code": "invalid_api_key",
  "detail": "Provide 'Authorization: Bearer <key>'.",
  "request_id": "e4042b29-8f1e-4c7a-9b52-6f0d1a3c7e11"
}

{
  "type": "https://iotools.cloud/docs/errors/insufficient_credits",
  "title": "Insufficient credits",
  "status": 402,
  "code": "insufficient_credits",
  "detail": "This call costs 1 credit and 0 remain in this month's allowance.",
  "request_id": "e4042b29-8f1e-4c7a-9b52-6f0d1a3c7e11",
  "credits_used": 0,
  "credits_remaining": 0
}

{
  "type": "https://iotools.cloud/docs/errors/tool_not_allowed",
  "title": "Tool not available over the API",
  "status": 403,
  "code": "tool_not_allowed",
  "detail": "\"Background Remover\" is available on iotools.cloud but has no API endpoint.",
  "request_id": "e4042b29-8f1e-4c7a-9b52-6f0d1a3c7e11"
}

{
  "type": "https://iotools.cloud/docs/errors/tool_not_found",
  "title": "Tool not found",
  "status": 404,
  "code": "tool_not_found",
  "detail": "No tool with that slug. See GET /v1/tools/list.",
  "request_id": "e4042b29-8f1e-4c7a-9b52-6f0d1a3c7e11"
}

{
  "type": "https://iotools.cloud/docs/errors/payload_too_large",
  "title": "Payload too large",
  "status": 413,
  "code": "payload_too_large",
  "detail": "Request body exceeds this tool's size limit.",
  "request_id": "e4042b29-8f1e-4c7a-9b52-6f0d1a3c7e11"
}

{
  "type": "https://iotools.cloud/docs/errors/rate_limited",
  "title": "Rate limit exceeded",
  "status": 429,
  "code": "rate_limited",
  "detail": "Too many requests. Retry in 30s.",
  "request_id": "e4042b29-8f1e-4c7a-9b52-6f0d1a3c7e11",
  "retry_after": 30
}

{
  "type": "https://iotools.cloud/docs/errors/processing_error",
  "title": "Tool failed to run",
  "status": 500,
  "code": "processing_error",
  "detail": "The tool failed to run. Please try again.",
  "request_id": "e4042b29-8f1e-4c7a-9b52-6f0d1a3c7e11",
  "credits_used": 0
}

{
  "type": "https://iotools.cloud/docs/errors/tool_disabled",
  "title": "Tool temporarily disabled",
  "status": 503,
  "code": "tool_disabled",
  "detail": "This tool is temporarily unavailable. Try again shortly.",
  "request_id": "e4042b29-8f1e-4c7a-9b52-6f0d1a3c7e11"
}