curl --request GET \
  --url https://xbt-mainnet.gomaestro-api.org/v0/esplora/tx/{txid}/rbf \
  --header 'api-key: <api-key>'

import requests

url = "https://xbt-mainnet.gomaestro-api.org/v0/esplora/tx/{txid}/rbf"

headers = {"api-key": "<api-key>"}

response = requests.get(url, headers=headers)

print(response.text)

const options = {method: 'GET', headers: {'api-key': '<api-key>'}};

fetch('https://xbt-mainnet.gomaestro-api.org/v0/esplora/tx/{txid}/rbf', 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://xbt-mainnet.gomaestro-api.org/v0/esplora/tx/{txid}/rbf",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "api-key: <api-key>"
  ],
]);

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

curl_close($curl);

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

package main

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

func main() {

	url := "https://xbt-mainnet.gomaestro-api.org/v0/esplora/tx/{txid}/rbf"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("api-key", "<api-key>")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.get("https://xbt-mainnet.gomaestro-api.org/v0/esplora/tx/{txid}/rbf")
  .header("api-key", "<api-key>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://xbt-mainnet.gomaestro-api.org/v0/esplora/tx/{txid}/rbf")

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

request = Net::HTTP::Get.new(url)
request["api-key"] = '<api-key>'

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

{
  "replacements": {
    "tx": {
      "txid": "2e95ff9094df9f3650e3f2abc189250760162be89a88f9f2f23301c7cb14b8b4",
      "fee": 1668,
      "vsize": 276.75,
      "value": 14849,
      "rate": 4.8242,
      "rbf": false,
      "fullRbf": true
    },
    "time": 1703240261,
    "fullRbf": true,
    "replaces": []
  },
  "replaces": [
    "3f4670463daadffed07d7a1060071b07f7e81a2566eca21d78bb513cbf21c82a",
    "92f9b4f719d0ffc9035d3a9767d80c940cecbc656df2243bafd33f52b583ee92"
  ]
}