curl --request POST \
  --url https://sourcify.dev/server/v2/verify/similarity/{chainId}/{address} \
  --header 'Content-Type: application/json' \
  --data '
{
  "creationTransactionHash": "0xb6ee9d528b336942dd70d3b41e2811be10a473776352009fd73f85604f5ed206"
}
'

import requests

url = "https://sourcify.dev/server/v2/verify/similarity/{chainId}/{address}"

payload = { "creationTransactionHash": "0xb6ee9d528b336942dd70d3b41e2811be10a473776352009fd73f85604f5ed206" }
headers = {"Content-Type": "application/json"}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    creationTransactionHash: '0xb6ee9d528b336942dd70d3b41e2811be10a473776352009fd73f85604f5ed206'
  })
};

fetch('https://sourcify.dev/server/v2/verify/similarity/{chainId}/{address}', 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://sourcify.dev/server/v2/verify/similarity/{chainId}/{address}",
  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([
    'creationTransactionHash' => '0xb6ee9d528b336942dd70d3b41e2811be10a473776352009fd73f85604f5ed206'
  ]),
  CURLOPT_HTTPHEADER => [
    "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://sourcify.dev/server/v2/verify/similarity/{chainId}/{address}"

	payload := strings.NewReader("{\n  \"creationTransactionHash\": \"0xb6ee9d528b336942dd70d3b41e2811be10a473776352009fd73f85604f5ed206\"\n}")

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

	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://sourcify.dev/server/v2/verify/similarity/{chainId}/{address}")
  .header("Content-Type", "application/json")
  .body("{\n  \"creationTransactionHash\": \"0xb6ee9d528b336942dd70d3b41e2811be10a473776352009fd73f85604f5ed206\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://sourcify.dev/server/v2/verify/similarity/{chainId}/{address}")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"creationTransactionHash\": \"0xb6ee9d528b336942dd70d3b41e2811be10a473776352009fd73f85604f5ed206\"\n}"

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

{
  "verificationId": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
}

{
  "customCode": "unsupported_chain",
  "message": "The chain with chainId 9429413 is not supported",
  "errorId": "1ac6b91a-0605-4459-93dc-18f210a70192"
}

{
  "customCode": "already_verified",
  "message": "Contract 0xe7f1725E7734CE288F8367e1Bb143E90bb3F0512 on chain 31337 is already verified with runtimeMatch and creationMatch both being exact matches.",
  "errorId": "23aaf52e-168a-4cfa-8463-65ddfb792efc"
}

{
  "customCode": "duplicate_verification_request",
  "message": "Contract 0xe7f1725E7734CE288F8367e1Bb143E90bb3F0512 on chain 31337 is already being verified.",
  "errorId": "23aaf52e-168a-4cfa-8463-65ddfb792efc"
}

{
  "customCode": "internal_error",
  "message": "Something went wrong",
  "errorId": "1ac6b91a-0605-4459-93dc-18f210a70192"
}