How to fix Error: EPROTO: protocol error, read in Node.js

// Wrong - HTTPS on HTTP-only server
const response = await fetch('https://localhost:3000/api');

// Correct - Use HTTP for local development
const response = await fetch('http://localhost:3000/api');

// Wrong - Mixed protocol
const axios = require('axios');
const client = axios.create({
  baseURL: 'http://api.example.com:443' // HTTP on HTTPS port
});

// Correct - Protocol matches port
const client = axios.create({
  baseURL: 'https://api.example.com' // Port 443 implicit
});

curl -v https://api.example.com/endpoint

node --tls-min-v1.0 app.js

const https = require('https');
const tls = require('tls');

// Lower minimum TLS version (use with caution)
const agent = new https.Agent({
  minVersion: 'TLSv1',
  maxVersion: 'TLSv1.3'
});

https.get('https://legacy-api.example.com', { agent }, (res) => {
  // Handle response
});

# Check current version
node --version

# Update using nvm (recommended)
nvm install --lts
nvm use --lts

# Or download from nodejs.org
# https://nodejs.org/

node -p "process.versions.openssl"

const https = require('https');

async function fetchWithRetry(url, maxRetries = 3) {
  for (let attempt = 1; attempt <= maxRetries; attempt++) {
    try {
      const response = await fetch(url);
      return response;
    } catch (error) {
      if (error.code === 'EPROTO' && attempt < maxRetries) {
        console.log(`EPROTO error, retrying (${attempt}/${maxRetries})...`);
        await new Promise(resolve => setTimeout(resolve, 1000 * attempt));
        continue;
      }
      throw error;
    }
  }
}

// Use with better error messages
try {
  const data = await fetchWithRetry('https://api.example.com');
  console.log(data);
} catch (error) {
  if (error.code === 'EPROTO') {
    console.error('Protocol error - check URL protocol and server TLS version');
  }
  throw error;
}