wget --no-check-certificate --quiet \
  --method POST \
  --timeout=0 \
  --header 'Content-Type: application/json' \
  --header 'accept: application/json' \
  --header 'X-CoinAPI-Key: 4303fb63-adec-42dc-b571-74bc2f2a5167' \
  --body-data '{"jsonrpc":"2.0","id":1,"method":"abandontransaction","params": [ ]}' \
   'https://bitcoin-mainnet.node.coinapi.io'

var client = new HttpClient();
var request = new HttpRequestMessage(HttpMethod.Post, "https://bitcoin-mainnet.node.coinapi.io");
request.Headers.Add("accept", "application/json");
request.Headers.Add("X-CoinAPI-Key", "73034021-THIS-IS-SAMPLE-KEY");
var content = new StringContent("{\r\n  \"jsonrpc\": \"1.0\",\r\n  \"id\": \"1\",\r\n  \"method\": \"abandontransaction\",\r\n  \"params\": []\r\n}\r\n", null, "application/json");
request.Content = content;
var response = await client.SendAsync(request);
response.EnsureSuccessStatusCode();
Console.WriteLine(await response.Content.ReadAsStringAsync());

<?php
$client = new Client();
$headers = [
  'Content-Type' => 'application/json',
  'accept' => 'application/json',
  'X-CoinAPI-Key' => '73034021-THIS-IS-SAMPLE-KEY'
];
$body = '{
  "jsonrpc": "1.0",
  "id": "1",
  "method": "abandontransaction",
  "params": []
}';
$request = new Request('POST', 'https://bitcoin-mainnet.node.coinapi.io', $headers, $body);
$res = $client->sendAsync($request)->wait();
echo $res->getBody();
?>

import requests
import json

url = "https://bitcoin-mainnet.node.coinapi.io"

payload = json.dumps({
  "jsonrpc": "1.0",
  "id": "1",
  "method": "abandontransaction",
  "params": []
})
headers = {
  'Content-Type': 'application/json',
  'accept': 'application/json',
  'X-CoinAPI-Key': '73034021-THIS-IS-SAMPLE-KEY'
}

response = requests.request("POST", url, headers=headers, data=payload)

print(response.text)

var settings = {
  "url": "https://bitcoin-mainnet.node.coinapi.io",
  "method": "POST",
  "timeout": 0,
  "headers": {
    "Content-Type": "application/json",
    "accept": "application/json",
    "X-CoinAPI-Key": "73034021-THIS-IS-SAMPLE-KEY"
  },
  "data": JSON.stringify({
    "jsonrpc": "1.0",
    "id": "1",
    "method": "abandontransaction",
    "params": []
  }),
};

$.ajax(settings).done(function (response) {
  console.log(response);
});

package main

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

func main() {

url := "https://bitcoin-mainnet.node.coinapi.io"
method := "POST"

payload := strings.NewReader(`{`+"
"+`
  "jsonrpc": "1.0",`+"
"+`
  "id": "1",`+"
"+`
  "method": "abandontransaction",`+"
"+`
  "params": []`+"
"+`
}`+"
"+`
`)

client := &http.Client {
}
req, err := http.NewRequest(method, url, payload)

if err != nil {
fmt.Println(err)
return
}
req.Header.Add("Content-Type", "application/json")
req.Header.Add("accept", "application/json")
req.Header.Add("X-CoinAPI-Key", "73034021-THIS-IS-SAMPLE-KEY")

res, err := client.Do(req)
if err != nil {
fmt.Println(err)
return
}
defer res.Body.Close()

body, err := ioutil.ReadAll(res.Body)
if err != nil {
fmt.Println(err)
return
}
fmt.Println(string(body))
}

require "uri"
require "json"
require "net/http"

url = URI("https://bitcoin-mainnet.node.coinapi.io")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = "application/json"
request["accept"] = "application/json"
request["X-CoinAPI-Key"] = "73034021-THIS-IS-SAMPLE-KEY"
request.body = JSON.dump({
  "jsonrpc": "1.0",
  "id": "1",
  "method": "abandontransaction",
  "params": []
})

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

OkHttpClient client = new OkHttpClient().newBuilder().build();
MediaType mediaType = MediaType.parse("application/json");
RequestBody body = RequestBody.create(mediaType, "{\r\n  \"jsonrpc\": \"1.0\",\r\n  \"id\": \"1\",\r\n  \"method\": \"abandontransaction\",\r\n  \"params\": []\r\n}\r\n");
Request request = new Request.Builder()
  .url("https://bitcoin-mainnet.node.coinapi.io")
  .method("POST", body)
  .addHeader("Content-Type", "application/json")
  .addHeader("accept", "application/json")
  .addHeader("X-CoinAPI-Key", "73034021-THIS-IS-SAMPLE-KEY")
  .build();
Response response = client.newCall(request).execute();

{
  "result": null,
  "error": {
    "code": -1,
    "message": "abandontransaction \"txid\"\n\nMark in-wallet transaction <txid> as abandoned\nThis will mark this transaction and all its in-wallet descendants as abandoned which will allow\nfor their inputs to be respent.  It can be used to replace \"stuck\" or evicted transactions.\nIt only works on transactions which are not included in a block and are not currently in the mempool.\nIt has no effect on transactions which are already abandoned.\n\nArguments:\n1. txid    (string, required) The transaction id\n\nResult:\nnull    (json null)\n\nExamples:\n> bitcoin-cli abandontransaction \"1075db55d416d3ca199f55b6084e2115b9345e16c5cf302fc80e9d5fbf5d48d\"\n> curl --user myusername --data-binary '{\"jsonrpc\": \"1.0\", \"id\": \"curltest\", \"method\": \"abandontransaction\", \"params\": [\"1075db55d416d3ca199f55b6084e2115b9345e16c5cf302fc80e9d5fbf5d48d\"]}' -H 'content-type: text/plain;' http://127.0.0.1:8332/\n"
  },
  "id": "1"
}