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POST
/
v1
/
simulate
/
{network}
/
transaction
Simulate Cosmos Transaction
curl --request POST \
  --url https://api.range.org/v1/simulate/{network}/transaction \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "tx": "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"
}
'
import requests

url = "https://api.range.org/v1/simulate/{network}/transaction"

payload = { "tx": "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" }
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({
    tx: 'CoEECv4DCh0vY29zbW9zLmF1dGh6LnYxYmV0YTEuTXNnRXhlYxLcAworb3NtbzE3OW50bGM3c2gyZGFkc2F0ZjdoNGd6ZHkzand2cTQ3NWE3ZWN0NxKsAwoxL29zbW9zaXMucG9vbG1hbmFnZXIudjFiZXRhMS5Nc2dTd2FwRXhhY3RBbW91bnRJbhL2Agorb3NtbzFkbGRyeHo1cDh1ZXp4ejNxc3RwdjkyZGU3d2dmcDdodnI3MmRjbRJJCOMLEkRpYmMvMTc4MjQ4QzI2MkRFMkUxNDFFRTYyODdFRTdBQjA4NTRGMDVGMjVCMEEzRjQwQzRCOTEyRkExQzdFNTFGNDY2RRIKCJQNEgV1b3NtbxJJCLgLEkRpYmMvNDk4QTA3NTFDNzk4QTBEOUEzODlBQTM2OTExMjNEQURBNTdEQUE0RkUxNjVENUM3NTg5NDUwNUI4NzZCQTZFNBJJCMcJEkRpYmMvRDE4OTMzNUM2RTRBNjhCNTEzQzEwQUIyMjdCRjFDMUQzOEM3NDY3NjYyNzhCQTNFRUI0RkIxNDEyNEYxRDg1OBpQCkRpYmMvNDk4QTA3NTFDNzk4QTBEOUEzODlBQTM2OTExMjNEQURBNTdEQUE0RkUxNjVENUM3NTg5NDUwNUI4NzZCQTZFNBIINTMwNzIzNTUiCDUzMDcyMzU1EmkKUgpGCh8vY29zbW9zLmNyeXB0by5zZWNwMjU2azEuUHViS2V5EiMKIQI44AflBFsxuMDrOXsYpll6ZdyZB4hvIgVmAV9y7inkcBIECgIIARiH4B0SEwoNCgV1b3NtbxIENDM3NhDw52oaQNcdpT1IJzCdk1gfBY3z7r+ArcRMHtCJrxf5J0O3B8suIti4rDlIWpedzw0GoJx/VQvaM6ZT44Fh8bMh9O6IWBw='
  })
};

fetch('https://api.range.org/v1/simulate/{network}/transaction', 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.range.org/v1/simulate/{network}/transaction",
  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([
    'tx' => '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'
  ]),
  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.range.org/v1/simulate/{network}/transaction"

	payload := strings.NewReader("{\n  \"tx\": \"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\"\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.range.org/v1/simulate/{network}/transaction")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"tx\": \"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\"\n}")
  .asString();
require 'uri'
require 'net/http'

url = URI("https://api.range.org/v1/simulate/{network}/transaction")

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  \"tx\": \"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\"\n}"

response = http.request(request)
puts response.read_body
{
  "addresses": [
    {}
  ],
  "gas_info": {
    "gas_wanted": "<string>",
    "gas_used": "<string>"
  }
}
The Cosmos Transaction Simulator supports simulation of transactions across Cosmos SDK-based networks including Osmosis and Neutron, providing the same detailed analysis available for Solana, instruction parsing, balance changes, state predictions, and risk assessment. For Cosmos-based addresses, use the Address Risk Score endpoint to check risk levels before transacting. Supported Cosmos networks include osmosis-1, cosmoshub-4, dydx-mainnet-1, neutron-1, celestia, and more. Contact us for early access or updates on availability.

Authorizations

​
Authorization
string
header
required

Use Authorization: Bearer

Path Parameters

​
network
enum<string>
required

The network to simulate the transaction on

Available options:
osmosis-1,
neutron-1

Body

application/json
​
tx
string
required

Keplr transaction or Base64 encoded raw transaction

Minimum string length: 1
Example:

"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"

Response

200 - application/json

Simulated transaction result

​
addresses
object[]
required
​
gas_info
object
required
Last modified on June 17, 2026