curl --request POST \
--url https://live.launcx.com/api/v3/debug/signature-check \
--header 'Content-Type: application/json' \
--header 'x-api-key: <x-api-key>' \
--data '{}'import requests
url = "https://live.launcx.com/api/v3/debug/signature-check"
payload = {}
headers = {
"x-api-key": "<x-api-key>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {'x-api-key': '<x-api-key>', 'Content-Type': 'application/json'},
body: JSON.stringify({})
};
fetch('https://live.launcx.com/api/v3/debug/signature-check', 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://live.launcx.com/api/v3/debug/signature-check",
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([
]),
CURLOPT_HTTPHEADER => [
"Content-Type: application/json",
"x-api-key: <x-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://live.launcx.com/api/v3/debug/signature-check"
payload := strings.NewReader("{}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("x-api-key", "<x-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://live.launcx.com/api/v3/debug/signature-check")
.header("x-api-key", "<x-api-key>")
.header("Content-Type", "application/json")
.body("{}")
.asString();require 'uri'
require 'net/http'
url = URI("https://live.launcx.com/api/v3/debug/signature-check")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["x-api-key"] = '<x-api-key>'
request["Content-Type"] = 'application/json'
request.body = "{}"
response = http.request(request)
puts response.read_body{
"valid": true,
"diagnostics": {
"received_body": "{\"hello\":\"world\"}",
"received_body_length": 17,
"received_body_sha256": "<string>",
"received_timestamp": "1719700000000",
"server_time_ms": 1719700000123,
"window_delta_ms": 123,
"window_ok": true,
"signed_payload_string": "1719700000000.{\"hello\":\"world\"}",
"client_provided_signature": "<string>",
"diagnosis": "ok"
}
}{
"error": "invalid email or password"
}{
"error": "invalid email or password"
}Test your request signature (B2B debug)
Runs the exact same HMAC-SHA256 verification pipeline as the enforcing endpoints, but ALWAYS returns 200 with a field-by-field diagnostic instead of an opaque 401. Use it to validate your signing implementation before calling business endpoints: send any JSON body signed exactly as you would a real request, then compare received_body with the bytes you signed and recompute HMAC-SHA256 over signed_payload_string locally to compare against your own v1. For security the server does NOT return its computed signature. Never takes any business action regardless of payload. Rate-limited to 20 requests/minute per client.
curl --request POST \
--url https://live.launcx.com/api/v3/debug/signature-check \
--header 'Content-Type: application/json' \
--header 'x-api-key: <x-api-key>' \
--data '{}'import requests
url = "https://live.launcx.com/api/v3/debug/signature-check"
payload = {}
headers = {
"x-api-key": "<x-api-key>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {'x-api-key': '<x-api-key>', 'Content-Type': 'application/json'},
body: JSON.stringify({})
};
fetch('https://live.launcx.com/api/v3/debug/signature-check', 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://live.launcx.com/api/v3/debug/signature-check",
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([
]),
CURLOPT_HTTPHEADER => [
"Content-Type: application/json",
"x-api-key: <x-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://live.launcx.com/api/v3/debug/signature-check"
payload := strings.NewReader("{}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("x-api-key", "<x-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://live.launcx.com/api/v3/debug/signature-check")
.header("x-api-key", "<x-api-key>")
.header("Content-Type", "application/json")
.body("{}")
.asString();require 'uri'
require 'net/http'
url = URI("https://live.launcx.com/api/v3/debug/signature-check")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["x-api-key"] = '<x-api-key>'
request["Content-Type"] = 'application/json'
request.body = "{}"
response = http.request(request)
puts response.read_body{
"valid": true,
"diagnostics": {
"received_body": "{\"hello\":\"world\"}",
"received_body_length": 17,
"received_body_sha256": "<string>",
"received_timestamp": "1719700000000",
"server_time_ms": 1719700000123,
"window_delta_ms": 123,
"window_ok": true,
"signed_payload_string": "1719700000000.{\"hello\":\"world\"}",
"client_provided_signature": "<string>",
"diagnosis": "ok"
}
}{
"error": "invalid email or password"
}{
"error": "invalid email or password"
}Headers
Client API Key
The signature under test. Format: t=,v1=. Omitting it is allowed — the diagnostic will report missing_signature_header.
Body
Any JSON payload — hashed byte-for-byte, never parsed as business data
The body is of type object.