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Featured Solutions

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VerifyNode.jsRedisSaaS★ Featured

SMS OTP Verification with Rate Limiting — Node.js + Redis

// Rate-limited OTP via Twilio Verify
const client = require('twilio')(accountSid, authToken);
 
async function sendOTP(phone) {
  const key = `otp:${phone}`;
  const count = await redis.incr(key);
  if (count > 3) throw new Error('Rate limit');
  await redis.expire(key, 3600);
  return client.verify.v2
    .services(verifySid)
    .verifications.create({ to: phone, channel: 'sms' });
}

Marcus Webb· 2h ago

18,42094

WebhooksNode.jsSecurity

Webhook signature validation middleware — Express

// Validate Twilio webhook signature
const { validateRequest } = require('twilio');
 
function twilioWebhook(req, res, next) {
  const valid = validateRequest(
    authToken, req.headers['x-twilio-signature'],
    url, req.body
  );
  if (!valid) return res.status(403).end();
  next();
}

Priya Nair· 5h ago

9,87047

VoicePythonTwiMLPostgreSQL

Voice IVR with dynamic Postgres menu — Python Flask

# Dynamic IVR from database
from flask import Flask
from twilio.twiml.voice_response import VoiceResponse
 
@app.route('/ivr', methods=['POST'])
def ivr_menu():
  options = db.query("SELECT * FROM menu")
  resp = VoiceResponse()
  gather = resp.gather(num_digits=1)
  for opt in options:
    gather.say(opt.prompt)
  return str(resp)

Daniel Okonkwo· 1d ago

7,34038

ScaleKafkaSMSDevOps

Messaging pipeline at 1M+ events/day — Kafka + Twilio

// Kafka consumer → Twilio SMS batch
const consumer = kafka.consumer({ groupId: 'sms-workers' });
await consumer.subscribe({ topic: 'notifications' });
 
await consumer.run({
  eachBatch: async ({ batch }) => {
    const msgs = batch.messages.map(m =>
      client.messages.create(parse(m.value))
    );
    await Promise.allSettled(msgs);
    // allSettled handles partial failures gracefully
  }
});

Sofia Marchetti· 3d ago

12,80063

Community

The people behind the answers.

Champion Leaderboard — Feb 2026

Marcus WebbChampion

SMS · Verify

12,840

847 answers

Priya NairChampion

Voice · TwiML

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692 answers

Daniel OkonkwoExpert

Python · Flask

8,760

581 answers

Sofia MarchettiExpert

Scale · Kafka

7,140

476 answers

James OduyaContributor

Flex · TaskRouter

5,820

389 answers

+ 847 more contributors this month

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