Helius Sender
sendTransaction (Sender)
Ultra-low latency transaction submission with multi-path routing across Helius, Jito, Harmonic, Rakurai, and more.
POST
/
fast
sendTransaction
curl --request POST \
--url https://sender.helius-rpc.com/fast \
--header 'Content-Type: application/json' \
--data '
{
"jsonrpc": "2.0",
"id": "1",
"method": "sendTransaction",
"params": [
"Ab/WBgJxCprwWlK2fCxSwm9KrWlJQW8TdnYqXMvg5KropeLqHaa5yJeoWUb+LsGi6zlfs1Z/jA/RgJW++tBhPAKAAQACBGuePYZrXq9Jj+DwkquiMvsrNU5rlcAbmRfuAYui/CwAQr437DqfrFoSt1BSgM/2/0Iqja1QMefnu1hTYX96AA0DBkZv5SEXMv/srbpyw5vnvIzlu8X3EmssQ5s6QAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAhWHa4WfUT12o+cyi2WGwfBvngyurXf5VQd4Ukn+5ZSIDAgAFAqCGAQACAAkDQA0DAAAAAAADAgABDAIAAABAQg8AAAAAAAA=",
{
"encoding": "base64",
"skipPreflight": true,
"maxRetries": 0
}
]
}
'import requests
url = "https://sender.helius-rpc.com/fast"
payload = {
"jsonrpc": "2.0",
"id": "1",
"method": "sendTransaction",
"params": [
"Ab/WBgJxCprwWlK2fCxSwm9KrWlJQW8TdnYqXMvg5KropeLqHaa5yJeoWUb+LsGi6zlfs1Z/jA/RgJW++tBhPAKAAQACBGuePYZrXq9Jj+DwkquiMvsrNU5rlcAbmRfuAYui/CwAQr437DqfrFoSt1BSgM/2/0Iqja1QMefnu1hTYX96AA0DBkZv5SEXMv/srbpyw5vnvIzlu8X3EmssQ5s6QAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAhWHa4WfUT12o+cyi2WGwfBvngyurXf5VQd4Ukn+5ZSIDAgAFAqCGAQACAAkDQA0DAAAAAAADAgABDAIAAABAQg8AAAAAAAA=",
{
"encoding": "base64",
"skipPreflight": True,
"maxRetries": 0
}
]
}
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({
jsonrpc: '2.0',
id: '1',
method: 'sendTransaction',
params: [
'Ab/WBgJxCprwWlK2fCxSwm9KrWlJQW8TdnYqXMvg5KropeLqHaa5yJeoWUb+LsGi6zlfs1Z/jA/RgJW++tBhPAKAAQACBGuePYZrXq9Jj+DwkquiMvsrNU5rlcAbmRfuAYui/CwAQr437DqfrFoSt1BSgM/2/0Iqja1QMefnu1hTYX96AA0DBkZv5SEXMv/srbpyw5vnvIzlu8X3EmssQ5s6QAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAhWHa4WfUT12o+cyi2WGwfBvngyurXf5VQd4Ukn+5ZSIDAgAFAqCGAQACAAkDQA0DAAAAAAADAgABDAIAAABAQg8AAAAAAAA=',
{encoding: 'base64', skipPreflight: true, maxRetries: 0}
]
})
};
fetch('https://sender.helius-rpc.com/fast', 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://sender.helius-rpc.com/fast",
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([
'jsonrpc' => '2.0',
'id' => '1',
'method' => 'sendTransaction',
'params' => [
'Ab/WBgJxCprwWlK2fCxSwm9KrWlJQW8TdnYqXMvg5KropeLqHaa5yJeoWUb+LsGi6zlfs1Z/jA/RgJW++tBhPAKAAQACBGuePYZrXq9Jj+DwkquiMvsrNU5rlcAbmRfuAYui/CwAQr437DqfrFoSt1BSgM/2/0Iqja1QMefnu1hTYX96AA0DBkZv5SEXMv/srbpyw5vnvIzlu8X3EmssQ5s6QAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAhWHa4WfUT12o+cyi2WGwfBvngyurXf5VQd4Ukn+5ZSIDAgAFAqCGAQACAAkDQA0DAAAAAAADAgABDAIAAABAQg8AAAAAAAA=',
[
'encoding' => 'base64',
'skipPreflight' => true,
'maxRetries' => 0
]
]
]),
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://sender.helius-rpc.com/fast"
payload := strings.NewReader("{\n \"jsonrpc\": \"2.0\",\n \"id\": \"1\",\n \"method\": \"sendTransaction\",\n \"params\": [\n \"Ab/WBgJxCprwWlK2fCxSwm9KrWlJQW8TdnYqXMvg5KropeLqHaa5yJeoWUb+LsGi6zlfs1Z/jA/RgJW++tBhPAKAAQACBGuePYZrXq9Jj+DwkquiMvsrNU5rlcAbmRfuAYui/CwAQr437DqfrFoSt1BSgM/2/0Iqja1QMefnu1hTYX96AA0DBkZv5SEXMv/srbpyw5vnvIzlu8X3EmssQ5s6QAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAhWHa4WfUT12o+cyi2WGwfBvngyurXf5VQd4Ukn+5ZSIDAgAFAqCGAQACAAkDQA0DAAAAAAADAgABDAIAAABAQg8AAAAAAAA=\",\n {\n \"encoding\": \"base64\",\n \"skipPreflight\": true,\n \"maxRetries\": 0\n }\n ]\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://sender.helius-rpc.com/fast")
.header("Content-Type", "application/json")
.body("{\n \"jsonrpc\": \"2.0\",\n \"id\": \"1\",\n \"method\": \"sendTransaction\",\n \"params\": [\n \"Ab/WBgJxCprwWlK2fCxSwm9KrWlJQW8TdnYqXMvg5KropeLqHaa5yJeoWUb+LsGi6zlfs1Z/jA/RgJW++tBhPAKAAQACBGuePYZrXq9Jj+DwkquiMvsrNU5rlcAbmRfuAYui/CwAQr437DqfrFoSt1BSgM/2/0Iqja1QMefnu1hTYX96AA0DBkZv5SEXMv/srbpyw5vnvIzlu8X3EmssQ5s6QAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAhWHa4WfUT12o+cyi2WGwfBvngyurXf5VQd4Ukn+5ZSIDAgAFAqCGAQACAAkDQA0DAAAAAAADAgABDAIAAABAQg8AAAAAAAA=\",\n {\n \"encoding\": \"base64\",\n \"skipPreflight\": true,\n \"maxRetries\": 0\n }\n ]\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://sender.helius-rpc.com/fast")
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 \"jsonrpc\": \"2.0\",\n \"id\": \"1\",\n \"method\": \"sendTransaction\",\n \"params\": [\n \"Ab/WBgJxCprwWlK2fCxSwm9KrWlJQW8TdnYqXMvg5KropeLqHaa5yJeoWUb+LsGi6zlfs1Z/jA/RgJW++tBhPAKAAQACBGuePYZrXq9Jj+DwkquiMvsrNU5rlcAbmRfuAYui/CwAQr437DqfrFoSt1BSgM/2/0Iqja1QMefnu1hTYX96AA0DBkZv5SEXMv/srbpyw5vnvIzlu8X3EmssQ5s6QAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAhWHa4WfUT12o+cyi2WGwfBvngyurXf5VQd4Ukn+5ZSIDAgAFAqCGAQACAAkDQA0DAAAAAAADAgABDAIAAABAQg8AAAAAAAA=\",\n {\n \"encoding\": \"base64\",\n \"skipPreflight\": true,\n \"maxRetries\": 0\n }\n ]\n}"
response = http.request(request)
puts response.read_body{
"jsonrpc": "2.0",
"id": "1",
"result": "4qTLpN1sBrp5SzZUKfrSH2897FmxA7AB4EbN4ccgSgEjG9RG2686pSKWhEbz65q4bvaRsdpKRJKZ3dkdGZA78u5s"
}{
"jsonrpc": "2.0",
"error": {
"code": -32602,
"message": "Invalid request"
},
"id": "1"
}{
"jsonrpc": "2.0",
"error": {
"code": -32005,
"message": "Too many requests"
},
"id": "1"
}{
"jsonrpc": "2.0",
"error": {
"code": -32603,
"message": "Internal error"
},
"id": "1"
}{
"jsonrpc": "2.0",
"error": {
"code": -32002,
"message": "Service unavailable"
},
"id": "1"
}{
"jsonrpc": "2.0",
"error": {
"code": -32003,
"message": "Gateway timeout"
},
"id": "1"
}Request Parameters
boolean
default:"false"
When true, routes exclusively through SWQOS infrastructure, but has a lower minimal tip requirement.
boolean
default:"false"
When true, routes your transaction away from validators statistically linked to sandwich attacks. Opt-in per request.
string
required
The transaction encoded in base64.
string
Data encoding format used for the Solana transaction payload.
base58base64
boolean
When true, bypasses Solana’s preflight transaction validation for faster submission. Optional — Sender supports preflight checks.
number
Maximum number of automatic retry attempts. Should be set to 0.
Query Parameters
Standard users do not require an API key. Only users with custom TPS limits need to provide an API key.
When true, routes exclusively through SWQOS infrastructure, but has a lower minimal tip requirement.
When true, routes your transaction away from validators statistically linked to sandwich attacks. Opt-in per request.
Body
application/json
The JSON-RPC protocol version.
Available options:
2.0 Example:
"2.0"
A unique identifier for the request.
Example:
"1"
The name of the RPC method to invoke.
Available options:
sendTransaction Example:
"sendTransaction"
Parameters for sending a transaction via Sender.
The transaction encoded in base64.
Response
Transaction submitted successfully. A 200 response does not guarantee that the transaction is valid or that it will land onchain.
The JSON-RPC protocol version.
Available options:
2.0 Example:
"2.0"
Identifier matching the request.
Example:
"1"
The transaction signature for tracking confirmation status.
Example:
"4qTLpN1sBrp5SzZUKfrSH2897FmxA7AB4EbN4ccgSgEjG9RG2686pSKWhEbz65q4bvaRsdpKRJKZ3dkdGZA78u5s"
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⌘I
sendTransaction
curl --request POST \
--url https://sender.helius-rpc.com/fast \
--header 'Content-Type: application/json' \
--data '
{
"jsonrpc": "2.0",
"id": "1",
"method": "sendTransaction",
"params": [
"Ab/WBgJxCprwWlK2fCxSwm9KrWlJQW8TdnYqXMvg5KropeLqHaa5yJeoWUb+LsGi6zlfs1Z/jA/RgJW++tBhPAKAAQACBGuePYZrXq9Jj+DwkquiMvsrNU5rlcAbmRfuAYui/CwAQr437DqfrFoSt1BSgM/2/0Iqja1QMefnu1hTYX96AA0DBkZv5SEXMv/srbpyw5vnvIzlu8X3EmssQ5s6QAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAhWHa4WfUT12o+cyi2WGwfBvngyurXf5VQd4Ukn+5ZSIDAgAFAqCGAQACAAkDQA0DAAAAAAADAgABDAIAAABAQg8AAAAAAAA=",
{
"encoding": "base64",
"skipPreflight": true,
"maxRetries": 0
}
]
}
'import requests
url = "https://sender.helius-rpc.com/fast"
payload = {
"jsonrpc": "2.0",
"id": "1",
"method": "sendTransaction",
"params": [
"Ab/WBgJxCprwWlK2fCxSwm9KrWlJQW8TdnYqXMvg5KropeLqHaa5yJeoWUb+LsGi6zlfs1Z/jA/RgJW++tBhPAKAAQACBGuePYZrXq9Jj+DwkquiMvsrNU5rlcAbmRfuAYui/CwAQr437DqfrFoSt1BSgM/2/0Iqja1QMefnu1hTYX96AA0DBkZv5SEXMv/srbpyw5vnvIzlu8X3EmssQ5s6QAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAhWHa4WfUT12o+cyi2WGwfBvngyurXf5VQd4Ukn+5ZSIDAgAFAqCGAQACAAkDQA0DAAAAAAADAgABDAIAAABAQg8AAAAAAAA=",
{
"encoding": "base64",
"skipPreflight": True,
"maxRetries": 0
}
]
}
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({
jsonrpc: '2.0',
id: '1',
method: 'sendTransaction',
params: [
'Ab/WBgJxCprwWlK2fCxSwm9KrWlJQW8TdnYqXMvg5KropeLqHaa5yJeoWUb+LsGi6zlfs1Z/jA/RgJW++tBhPAKAAQACBGuePYZrXq9Jj+DwkquiMvsrNU5rlcAbmRfuAYui/CwAQr437DqfrFoSt1BSgM/2/0Iqja1QMefnu1hTYX96AA0DBkZv5SEXMv/srbpyw5vnvIzlu8X3EmssQ5s6QAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAhWHa4WfUT12o+cyi2WGwfBvngyurXf5VQd4Ukn+5ZSIDAgAFAqCGAQACAAkDQA0DAAAAAAADAgABDAIAAABAQg8AAAAAAAA=',
{encoding: 'base64', skipPreflight: true, maxRetries: 0}
]
})
};
fetch('https://sender.helius-rpc.com/fast', 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://sender.helius-rpc.com/fast",
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([
'jsonrpc' => '2.0',
'id' => '1',
'method' => 'sendTransaction',
'params' => [
'Ab/WBgJxCprwWlK2fCxSwm9KrWlJQW8TdnYqXMvg5KropeLqHaa5yJeoWUb+LsGi6zlfs1Z/jA/RgJW++tBhPAKAAQACBGuePYZrXq9Jj+DwkquiMvsrNU5rlcAbmRfuAYui/CwAQr437DqfrFoSt1BSgM/2/0Iqja1QMefnu1hTYX96AA0DBkZv5SEXMv/srbpyw5vnvIzlu8X3EmssQ5s6QAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAhWHa4WfUT12o+cyi2WGwfBvngyurXf5VQd4Ukn+5ZSIDAgAFAqCGAQACAAkDQA0DAAAAAAADAgABDAIAAABAQg8AAAAAAAA=',
[
'encoding' => 'base64',
'skipPreflight' => true,
'maxRetries' => 0
]
]
]),
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://sender.helius-rpc.com/fast"
payload := strings.NewReader("{\n \"jsonrpc\": \"2.0\",\n \"id\": \"1\",\n \"method\": \"sendTransaction\",\n \"params\": [\n \"Ab/WBgJxCprwWlK2fCxSwm9KrWlJQW8TdnYqXMvg5KropeLqHaa5yJeoWUb+LsGi6zlfs1Z/jA/RgJW++tBhPAKAAQACBGuePYZrXq9Jj+DwkquiMvsrNU5rlcAbmRfuAYui/CwAQr437DqfrFoSt1BSgM/2/0Iqja1QMefnu1hTYX96AA0DBkZv5SEXMv/srbpyw5vnvIzlu8X3EmssQ5s6QAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAhWHa4WfUT12o+cyi2WGwfBvngyurXf5VQd4Ukn+5ZSIDAgAFAqCGAQACAAkDQA0DAAAAAAADAgABDAIAAABAQg8AAAAAAAA=\",\n {\n \"encoding\": \"base64\",\n \"skipPreflight\": true,\n \"maxRetries\": 0\n }\n ]\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://sender.helius-rpc.com/fast")
.header("Content-Type", "application/json")
.body("{\n \"jsonrpc\": \"2.0\",\n \"id\": \"1\",\n \"method\": \"sendTransaction\",\n \"params\": [\n \"Ab/WBgJxCprwWlK2fCxSwm9KrWlJQW8TdnYqXMvg5KropeLqHaa5yJeoWUb+LsGi6zlfs1Z/jA/RgJW++tBhPAKAAQACBGuePYZrXq9Jj+DwkquiMvsrNU5rlcAbmRfuAYui/CwAQr437DqfrFoSt1BSgM/2/0Iqja1QMefnu1hTYX96AA0DBkZv5SEXMv/srbpyw5vnvIzlu8X3EmssQ5s6QAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAhWHa4WfUT12o+cyi2WGwfBvngyurXf5VQd4Ukn+5ZSIDAgAFAqCGAQACAAkDQA0DAAAAAAADAgABDAIAAABAQg8AAAAAAAA=\",\n {\n \"encoding\": \"base64\",\n \"skipPreflight\": true,\n \"maxRetries\": 0\n }\n ]\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://sender.helius-rpc.com/fast")
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 \"jsonrpc\": \"2.0\",\n \"id\": \"1\",\n \"method\": \"sendTransaction\",\n \"params\": [\n \"Ab/WBgJxCprwWlK2fCxSwm9KrWlJQW8TdnYqXMvg5KropeLqHaa5yJeoWUb+LsGi6zlfs1Z/jA/RgJW++tBhPAKAAQACBGuePYZrXq9Jj+DwkquiMvsrNU5rlcAbmRfuAYui/CwAQr437DqfrFoSt1BSgM/2/0Iqja1QMefnu1hTYX96AA0DBkZv5SEXMv/srbpyw5vnvIzlu8X3EmssQ5s6QAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAhWHa4WfUT12o+cyi2WGwfBvngyurXf5VQd4Ukn+5ZSIDAgAFAqCGAQACAAkDQA0DAAAAAAADAgABDAIAAABAQg8AAAAAAAA=\",\n {\n \"encoding\": \"base64\",\n \"skipPreflight\": true,\n \"maxRetries\": 0\n }\n ]\n}"
response = http.request(request)
puts response.read_body{
"jsonrpc": "2.0",
"id": "1",
"result": "4qTLpN1sBrp5SzZUKfrSH2897FmxA7AB4EbN4ccgSgEjG9RG2686pSKWhEbz65q4bvaRsdpKRJKZ3dkdGZA78u5s"
}{
"jsonrpc": "2.0",
"error": {
"code": -32602,
"message": "Invalid request"
},
"id": "1"
}{
"jsonrpc": "2.0",
"error": {
"code": -32005,
"message": "Too many requests"
},
"id": "1"
}{
"jsonrpc": "2.0",
"error": {
"code": -32603,
"message": "Internal error"
},
"id": "1"
}{
"jsonrpc": "2.0",
"error": {
"code": -32002,
"message": "Service unavailable"
},
"id": "1"
}{
"jsonrpc": "2.0",
"error": {
"code": -32003,
"message": "Gateway timeout"
},
"id": "1"
}