Create FCM Subtrader
curl --request POST \
--url https://external-api.kalshi.com/trade-api/v2/fcm/subtraders \
--header 'Content-Type: application/json' \
--header 'KALSHI-ACCESS-KEY: <api-key>' \
--header 'KALSHI-ACCESS-SIGNATURE: <api-key>' \
--header 'KALSHI-ACCESS-TIMESTAMP: <api-key>' \
--data '
{
"subtrader_suffix": "<string>"
}
'import requests
url = "https://external-api.kalshi.com/trade-api/v2/fcm/subtraders"
payload = { "subtrader_suffix": "<string>" }
headers = {
"KALSHI-ACCESS-KEY": "<api-key>",
"KALSHI-ACCESS-SIGNATURE": "<api-key>",
"KALSHI-ACCESS-TIMESTAMP": "<api-key>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {
'KALSHI-ACCESS-KEY': '<api-key>',
'KALSHI-ACCESS-SIGNATURE': '<api-key>',
'KALSHI-ACCESS-TIMESTAMP': '<api-key>',
'Content-Type': 'application/json'
},
body: JSON.stringify({subtrader_suffix: '<string>'})
};
fetch('https://external-api.kalshi.com/trade-api/v2/fcm/subtraders', 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://external-api.kalshi.com/trade-api/v2/fcm/subtraders",
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([
'subtrader_suffix' => '<string>'
]),
CURLOPT_HTTPHEADER => [
"Content-Type: application/json",
"KALSHI-ACCESS-KEY: <api-key>",
"KALSHI-ACCESS-SIGNATURE: <api-key>",
"KALSHI-ACCESS-TIMESTAMP: <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"
"strings"
"net/http"
"io"
)
func main() {
url := "https://external-api.kalshi.com/trade-api/v2/fcm/subtraders"
payload := strings.NewReader("{\n \"subtrader_suffix\": \"<string>\"\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("KALSHI-ACCESS-KEY", "<api-key>")
req.Header.Add("KALSHI-ACCESS-SIGNATURE", "<api-key>")
req.Header.Add("KALSHI-ACCESS-TIMESTAMP", "<api-key>")
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://external-api.kalshi.com/trade-api/v2/fcm/subtraders")
.header("KALSHI-ACCESS-KEY", "<api-key>")
.header("KALSHI-ACCESS-SIGNATURE", "<api-key>")
.header("KALSHI-ACCESS-TIMESTAMP", "<api-key>")
.header("Content-Type", "application/json")
.body("{\n \"subtrader_suffix\": \"<string>\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://external-api.kalshi.com/trade-api/v2/fcm/subtraders")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["KALSHI-ACCESS-KEY"] = '<api-key>'
request["KALSHI-ACCESS-SIGNATURE"] = '<api-key>'
request["KALSHI-ACCESS-TIMESTAMP"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"subtrader_suffix\": \"<string>\"\n}"
response = http.request(request)
puts response.read_body{
"subtrader_id": "<string>"
}{
"code": "<string>",
"message": "<string>",
"details": "<string>"
}{
"code": "<string>",
"message": "<string>",
"details": "<string>"
}{
"code": "<string>",
"message": "<string>",
"details": "<string>"
}{
"code": "<string>",
"message": "<string>",
"details": "<string>"
}{
"code": "<string>",
"message": "<string>",
"details": "<string>"
}fcm
Create FCM Subtrader
Endpoint for FCM members to create a subtrader on the event-contract exchange. The subtrader is registered on every exchange shard that knows the FCM; a shard provisioned later registers it lazily on the subtrader’s first order there. Re-creating an existing subtrader returns 409.
POST
/
fcm
/
subtraders
Create FCM Subtrader
curl --request POST \
--url https://external-api.kalshi.com/trade-api/v2/fcm/subtraders \
--header 'Content-Type: application/json' \
--header 'KALSHI-ACCESS-KEY: <api-key>' \
--header 'KALSHI-ACCESS-SIGNATURE: <api-key>' \
--header 'KALSHI-ACCESS-TIMESTAMP: <api-key>' \
--data '
{
"subtrader_suffix": "<string>"
}
'import requests
url = "https://external-api.kalshi.com/trade-api/v2/fcm/subtraders"
payload = { "subtrader_suffix": "<string>" }
headers = {
"KALSHI-ACCESS-KEY": "<api-key>",
"KALSHI-ACCESS-SIGNATURE": "<api-key>",
"KALSHI-ACCESS-TIMESTAMP": "<api-key>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {
'KALSHI-ACCESS-KEY': '<api-key>',
'KALSHI-ACCESS-SIGNATURE': '<api-key>',
'KALSHI-ACCESS-TIMESTAMP': '<api-key>',
'Content-Type': 'application/json'
},
body: JSON.stringify({subtrader_suffix: '<string>'})
};
fetch('https://external-api.kalshi.com/trade-api/v2/fcm/subtraders', 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://external-api.kalshi.com/trade-api/v2/fcm/subtraders",
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([
'subtrader_suffix' => '<string>'
]),
CURLOPT_HTTPHEADER => [
"Content-Type: application/json",
"KALSHI-ACCESS-KEY: <api-key>",
"KALSHI-ACCESS-SIGNATURE: <api-key>",
"KALSHI-ACCESS-TIMESTAMP: <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"
"strings"
"net/http"
"io"
)
func main() {
url := "https://external-api.kalshi.com/trade-api/v2/fcm/subtraders"
payload := strings.NewReader("{\n \"subtrader_suffix\": \"<string>\"\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("KALSHI-ACCESS-KEY", "<api-key>")
req.Header.Add("KALSHI-ACCESS-SIGNATURE", "<api-key>")
req.Header.Add("KALSHI-ACCESS-TIMESTAMP", "<api-key>")
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://external-api.kalshi.com/trade-api/v2/fcm/subtraders")
.header("KALSHI-ACCESS-KEY", "<api-key>")
.header("KALSHI-ACCESS-SIGNATURE", "<api-key>")
.header("KALSHI-ACCESS-TIMESTAMP", "<api-key>")
.header("Content-Type", "application/json")
.body("{\n \"subtrader_suffix\": \"<string>\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://external-api.kalshi.com/trade-api/v2/fcm/subtraders")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["KALSHI-ACCESS-KEY"] = '<api-key>'
request["KALSHI-ACCESS-SIGNATURE"] = '<api-key>'
request["KALSHI-ACCESS-TIMESTAMP"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"subtrader_suffix\": \"<string>\"\n}"
response = http.request(request)
puts response.read_body{
"subtrader_id": "<string>"
}{
"code": "<string>",
"message": "<string>",
"details": "<string>"
}{
"code": "<string>",
"message": "<string>",
"details": "<string>"
}{
"code": "<string>",
"message": "<string>",
"details": "<string>"
}{
"code": "<string>",
"message": "<string>",
"details": "<string>"
}{
"code": "<string>",
"message": "<string>",
"details": "<string>"
}Authorizations
Your API key ID
Base64 signature of the pre-sign text (timestamp + method + path) made with the API key's algorithm - RSA-PSS with SHA-256 for RSA keys, Ed25519 for Ed25519 keys
Request timestamp in milliseconds
Body
application/json
Suffix for the new subtrader, 1-16 case-sensitive ASCII alphanumeric characters ([A-Za-z0-9]). The full subtrader id becomes {your_account_id}_{suffix}.
Response
Subtrader created successfully
The full id of the created subtrader.