OTP por SMS que sí llega, en México.

// Node 18+ en modulo ESM (.mjs o "type":"module"): usa await de nivel superior

const API = 'https://api.smsmasivos.com.mx/v2';

const H = { apikey: process.env.API_KEY,

'Content-Type': 'application/json' };

// Paso 1: Solicitar codigo

const payload = {

phone_number: '5512345678',

country_code: '52',

company:      'Mi App',

message:      '{{code}} es tu clave de acceso a {{company}}',

};

await fetch(`${API}/otp`, { method: 'POST', headers: H,

body: JSON.stringify(payload) });

→ 201 · action: created

// Paso 3: Validar codigo ingresado (sin costo)

await fetch(`${API}/otp/verify`, {

method: 'POST', headers: H,

body: JSON.stringify({ phone_number: '5512345678', country_code: '52', code: '483920' })

});

→ 200 OK

// Clic en "No recibi": mismo endpoint, cambias el canal

await fetch(`${API}/otp`, { method: 'POST', headers: H,

body: JSON.stringify({ ...payload, channel: 'whatsapp' }) });

→ 201 · action: resent

// 2do clic: fallback final con channel: 'voice'

import requests, os

API = 'https://api.smsmasivos.com.mx/v2'

H = {'apikey': os.environ['API_KEY']}

# Paso 1: Solicitar codigo

payload = {

'phone_number': '5512345678',

'country_code': '52',

'company':      'Mi App',

'message':      '{{code}} es tu clave de acceso a {{company}}',

}

requests.post(f'{API}/otp', headers=H, json=payload)

→ 201 · action: created

# Paso 3: Validar codigo ingresado (sin costo)

requests.post(f'{API}/otp/verify', headers=H,

json={'phone_number': '5512345678', 'country_code': '52', 'code': '483920'})

→ 200 OK

# Clic en "No recibi": mismo endpoint, cambias el canal

requests.post(f'{API}/otp', headers=H,

json={**payload, 'channel': 'whatsapp'})

→ 201 · action: resent

# 2do clic: fallback final con 'channel': 'voice'

$api = 'https://api.smsmasivos.com.mx/v2';

$h = ['apikey: ' . getenv('API_KEY'), 'Content-Type: application/json'];

// Paso 1: Solicitar codigo

$ch = curl_init($api . '/otp');

curl_setopt($ch, CURLOPT_HTTPHEADER, $h);

curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode([

'phone_number' => '5512345678',

'country_code' => '52',

'company'      => 'Mi App',

'message'      => '{{code}} es tu clave de acceso a {{company}}',

]));

curl_exec($ch);

→ 201 · action: created

// Paso 3: Validar codigo (sin costo)

$r = curl_init($api . '/otp/verify');

curl_setopt($r, CURLOPT_HTTPHEADER, $h);

curl_setopt($r, CURLOPT_POSTFIELDS, json_encode([

'phone_number' => '5512345678', 'country_code' => '52', 'code' => '483920']));

curl_exec($r);

→ 200 OK

// Clic en "No recibi": mismo endpoint, cambias el canal

$w = curl_init($api . '/otp');

curl_setopt($w, CURLOPT_HTTPHEADER, $h);

curl_setopt($w, CURLOPT_POSTFIELDS, json_encode([

'phone_number' => '5512345678', 'country_code' => '52',

'company'      => 'Mi App',

'message'      => '{{code}} es tu clave de acceso a {{company}}',

'channel'      => 'whatsapp',

]));

curl_exec($w);

→ 201 · action: resent

// 2do clic: fallback final con 'channel' => 'voice'

// Un closure: las 3 llamadas comparten base, apikey y Content-Type

post := func(path, body string) {

req, _ := http.NewRequest("POST", "https://api.smsmasivos.com.mx/v2"+path,

strings.NewReader(body))

req.Header.Set("apikey", os.Getenv("API_KEY"))

req.Header.Set("Content-Type", "application/json")

http.DefaultClient.Do(req)

}

// Paso 1: Envia el codigo

post("/otp", `{"phone_number":"5512345678","country_code":"52",

"company":"Mi App","message":"{{code}} es tu clave de acceso a {{company}}"}`)

→ 201 · action: created

// Paso 2: Usuario ingresa el codigo en tu app

→ Código capturado

// Paso 3: Validar codigo (sin costo)

post("/otp/verify",

`{"phone_number":"5512345678","country_code":"52","code":"483920"}`)

→ 200 OK

// Clic en "No recibi": mismo endpoint, cambias el canal

post("/otp", `{"phone_number":"5512345678","country_code":"52",

"company":"Mi App","message":"{{code}} es tu clave de acceso a {{company}}",

"channel":"whatsapp"}`)

→ 201 · action: resent

// 2do clic, fallback final: "channel":"voice"

→ Voz

// Dentro de un metodo que declare throws Exception (client.send es checked)

String api = "https://api.smsmasivos.com.mx/v2";

String key = System.getenv("API_KEY");

HttpClient client = HttpClient.newHttpClient();

// Paso 1: Solicitar codigo

String body = "{\"phone_number\":\"5512345678\",\"country_code\":\"52\","

+ "\"company\":\"Mi App\",\"message\":\"{{code}} es tu clave de acceso a {{company}}\"}";

client.send(HttpRequest.newBuilder(URI.create(api + "/otp"))

.header("apikey", key).header("Content-Type", "application/json")

.POST(BodyPublishers.ofString(body)).build(), BodyHandlers.ofString());

→ 201 · action: created

// Paso 2: Usuario ingresa el codigo en tu app

→ Código capturado

// Paso 3: Validar codigo (sin costo)

client.send(HttpRequest.newBuilder(URI.create(api + "/otp/verify"))

.header("apikey", key).header("Content-Type", "application/json")

.POST(BodyPublishers.ofString(

"{\"phone_number\":\"5512345678\",\"country_code\":\"52\",\"code\":\"483920\"}"))

.build(), BodyHandlers.ofString());

→ 200 OK

// Clic en "No recibi": mismo endpoint, cambias el canal

String resend = "{\"phone_number\":\"5512345678\",\"country_code\":\"52\","

+ "\"company\":\"Mi App\",\"message\":\"{{code}} es tu clave de acceso a {{company}}\","

+ "\"channel\":\"whatsapp\"}";

client.send(HttpRequest.newBuilder(URI.create(api + "/otp"))

.header("apikey", key).header("Content-Type", "application/json")

.POST(BodyPublishers.ofString(resend)).build(), BodyHandlers.ofString());

→ 201 · action: resent

// 2do clic, fallback final: "channel":"voice"

→ Voz

// Paso 1: Solicitar codigo

var client = new HttpClient();

client.DefaultRequestHeaders.Add("apikey",

Environment.GetEnvironmentVariable("API_KEY"));

await client.PostAsJsonAsync("https://api.smsmasivos.com.mx/v2/otp", new {

phone_number = "5512345678", country_code = "52",

company = "Mi App",

message = "{{code}} es tu clave de acceso a {{company}}"

});

→ 201 · action: created

// Paso 2: Usuario ingresa el codigo en tu app

→ Código capturado

// Paso 3: Validar codigo (sin costo)

await client.PostAsJsonAsync("https://api.smsmasivos.com.mx/v2/otp/verify", new {

phone_number = "5512345678", country_code = "52", code = "483920" });

→ 200 OK

// Clic en "No recibi": mismo endpoint, cambias el canal

await client.PostAsJsonAsync("https://api.smsmasivos.com.mx/v2/otp", new {

phone_number = "5512345678", country_code = "52",

company = "Mi App",

message = "{{code}} es tu clave de acceso a {{company}}",

channel = "whatsapp" });

→ 201 · action: resent

// 2do clic: fallback final con channel = "voice"

→ Voz

# Paso 1: Solicitar codigo

api = 'https://api.smsmasivos.com.mx/v2'

hdr = { 'apikey' => ENV['API_KEY'], 'Content-Type' => 'application/json' }

payload = {

phone_number: '5512345678', country_code: '52',

company: 'Mi App',

message: '{{code}} es tu clave de acceso a {{company}}'

}

Net::HTTP.post(URI("#{api}/otp"), payload.to_json, hdr)

→ 201 · action: created

# Paso 2: Usuario ingresa el codigo en tu app

→ Código capturado

# Paso 3: Validar codigo (sin costo)

Net::HTTP.post(URI("#{api}/otp/verify"),

{ phone_number: '5512345678', country_code: '52', code: '483920' }.to_json, hdr)

→ 200 OK

# Clic en "No recibi": mismo endpoint, cambias el canal

Net::HTTP.post(URI("#{api}/otp"),

payload.merge(channel: 'whatsapp').to_json, hdr)

→ 201 · action: resent

# 2do clic, fallback final: channel: 'voice'

→ Voz