"crypto.createECDH is not a function" - If you've seen this error, you're not alone. Here's why the web push landscape is finally changing.

If you've ever tried implementing push notifications on Cloudflare Workers, Vercel Edge, or any modern edge runtime, you've probably hit the same wall that thousands of developers face every month:

TypeError: crypto.createECDH is not a function

Or maybe this one:

ReferenceError: https.request is not available in edge runtime

These errors aren't bugs in your code. They're symptoms of a fundamental problem: the most popular web push library was built for a world that no longer exists.

The Uncomfortable Truth About web-push

For years, web-push has been the de facto standard for sending push notifications in Node.js. With 18+ million monthly downloads, it's the default choice that tutorials recommend, Stack Overflow answers reference, and ChatGPT suggests.

But here's what those recommendations don't tell you:

The issue has been open since 2022. The workarounds are fragile. The compatibility flags are band-aids. And the edge computing revolution isn't waiting.

Enter PushForge: Built for Where You're Deploying Today

PushForge is a zero-dependency web push library built entirely on the Web Crypto API, the same standard that runs in every modern browser, every edge runtime, and every JavaScript environment.

import { buildPushHTTPRequest } from "@pushforge/builder";

const { endpoint, headers, body } = await buildPushHTTPRequest({
  privateJWK: VAPID_PRIVATE_KEY,
  subscription: userSubscription,
  message: {
    payload: { title: "Hello!", body: "This works everywhere." },
    adminContact: "mailto:admin@example.com"
  }
});

await fetch(endpoint, { method: "POST", headers, body });

That's it. No polyfills. No compatibility flags. No "it works on my machine."

The Comparison Developers Are Making

* Convex requires "use node"; directive

The Numbers: Organic Growth That Speaks Volumes

72,500+ monthly downloads and growing. Zero paid marketing. Just developers solving real problems and telling others.

PushForge launched in April 2025 and has seen consistent month-over-month growth as edge computing adoption accelerates. The trajectory tells you which direction the industry is moving.

Why PushForge Works Where web-push Fails

The difference comes down to one architectural decision: standards vs. legacy APIs.

web-push approach (Node.js specific):

const crypto = require('crypto');
const https = require('https');
const ecdh = crypto.createECDH('prime256v1'); // Node.js only

PushForge approach (Web Standards):

const keyPair = await crypto.subtle.generateKey(
  { name: 'ECDH', namedCurve: 'P-256' },
  true, ['deriveBits']
); // Works everywhere

The Web Crypto API is:

• Available in every modern browser
• Supported by Cloudflare Workers, Vercel Edge, Deno, Bun
• Part of Node.js 20+ without flags
• The W3C standard for cryptographic operations

PushForge doesn't "polyfill" or "shim" its way to compatibility. It's built on the foundation that every JavaScript runtime shares.

Try Before You Trust: The Interactive Playground

Don't take our word for it. Test PushForge in your browser right now:

pushforge.draphy.org

The playground lets you:

• Quick Test: Enable notifications, send a test message, see it arrive
• Topic Channels: Subscribe to named topics, target specific groups
• Full Customization: Icons, images, action buttons, vibration patterns
• Push Options: Test urgency levels (battery hints), TTL, topic replacement
• Cross-Browser: Chrome, Firefox, Safari 16+, Edge, Brave

The backend? A single Cloudflare Worker using buildPushHTTPRequest(). Zero dependencies. The same code you'd write.

Subscriptions auto-expire (5 minutes for quick test, 1 hour for topics). No accounts. No data stored. Just push notifications, working.

Getting Started in 60 Seconds

1. Install

npm install @pushforge/builder

2. Generate VAPID Keys

npx @pushforge/builder vapid

Save the output: public key for your frontend, private key (JWK) for your server.

3. Subscribe Users (Frontend)

const registration = await navigator.serviceWorker.ready;
const subscription = await registration.pushManager.subscribe({
  userVisibleOnly: true,
  applicationServerKey: VAPID_PUBLIC_KEY
});
// Send subscription to your server

4. Send Notifications (Server)

import { buildPushHTTPRequest } from "@pushforge/builder";

const { endpoint, headers, body } = await buildPushHTTPRequest({
  privateJWK: JSON.parse(process.env.VAPID_PRIVATE_KEY),
  subscription,
  message: {
    payload: {
      title: "New Message",
      body: "You have a notification!",
      icon: "/icon.png",
      data: { url: "/messages" }
    },
    adminContact: "mailto:you@example.com",
    options: {
      ttl: 3600,
      urgency: "high"
    }
  }
});

const response = await fetch(endpoint, { method: "POST", headers, body });

Platform Examples Ready to Copy

Cloudflare Workers:

export default {
  async fetch(request, env) {
    const { endpoint, headers, body } = await buildPushHTTPRequest({
      privateJWK: JSON.parse(env.VAPID_PRIVATE_KEY),
      subscription: await request.json(),
      message: {
        payload: { title: "Hello from the Edge!" },
        adminContact: "mailto:admin@example.com"
      }
    });
    return fetch(endpoint, { method: "POST", headers, body });
  }
};

Vercel Edge Functions:

export const config = { runtime: "edge" };

export default async function handler(request: Request) {
  const { endpoint, headers, body } = await buildPushHTTPRequest({
    privateJWK: JSON.parse(process.env.VAPID_PRIVATE_KEY!),
    subscription: await request.json(),
    message: {
      payload: { title: "Edge Notification" },
      adminContact: "mailto:admin@example.com"
    }
  });
  await fetch(endpoint, { method: "POST", headers, body });
  return new Response("Sent");
}

Deno:

import { buildPushHTTPRequest } from "npm:@pushforge/builder";

const { endpoint, headers, body } = await buildPushHTTPRequest({
  privateJWK: JSON.parse(Deno.env.get("VAPID_PRIVATE_KEY")!),
  subscription,
  message: {
    payload: { title: "Hello from Deno!" },
    adminContact: "mailto:admin@example.com"
  }
});

await fetch(endpoint, { method: "POST", headers, body });

What Makes PushForge Different

TypeScript-First, Not TypeScript-Added

PushForge isn't a JavaScript library with type definitions bolted on. It's written in TypeScript from the ground up:

import type { 
  BuilderOptions,
  PushMessage,
  PushSubscription
} from "@pushforge/builder";

Your IDE knows the shape of every parameter. Your compiler catches mistakes before runtime. Your code documents itself.

Security Built In, Not Bolted On

PushForge validates everything before processing:

• VAPID key structure (EC P-256 curve with required x, y, d parameters)
• Subscription endpoints (must be valid HTTPS URLs)
• p256dh keys (65-byte uncompressed P-256 point format)
• Auth secrets (exactly 16 bytes)
• Payload size (max 4KB per Web Push spec)
• TTL bounds (max 24 hours per VAPID spec)

Invalid input fails fast with clear error messages, not cryptic failures deep in the crypto stack.

The Roadmap: What's Coming

PushForge is actively developed. Here's what's on the horizon:

• Batching & Queuing: Bulk notification delivery with rate limiting
• Built-in Retry Logic: Automatic error handling for push service failures
• Framework Examples: Ready-to-use templates for React, Vue, Next.js, SvelteKit
• Service Worker Templates: Drop-in notification handling code

Follow development: github.com/draphy/pushforge

The Developer Community

PushForge welcomes contributions. The workflow is straightforward:

1. Open an issue describing your change
2. Fork the repository
3. Create a branch: username/wpn-issuenumber-description
4. Follow conventional commit guidelines
5. Submit a pull request

The codebase uses modern tooling:

• Biome for fast formatting and linting
• Vitest for comprehensive testing
• Semantic Release for automated versioning
• GitHub Actions for CI/CD

Why Developers Are Switching

Here's what the migration typically looks like:

Before (web-push):

const webpush = require('web-push');

webpush.setVapidDetails(
  'mailto:admin@example.com',
  publicKey,
  privateKey
);

// Hope you're not on Cloudflare Workers...
await webpush.sendNotification(subscription, payload);

After (PushForge):

import { buildPushHTTPRequest } from "@pushforge/builder";

const { endpoint, headers, body } = await buildPushHTTPRequest({
  privateJWK,
  subscription,
  message: { payload, adminContact: "mailto:admin@example.com" }
});

// Works on ANY runtime with fetch()
await fetch(endpoint, { method: "POST", headers, body });

The API is intentionally minimal. You get endpoint, headers, and body. You use fetch(). That's the entire interface, and it works everywhere fetch() works.

The Bottom Line

The web has evolved. Serverless is the default. Edge computing is mainstream. The tools should match the territory.

PushForge is:

• Zero dependencies (no supply chain surprises)
• Web standards based (no Node.js lock-in)
• TypeScript native (no type guessing)
• Edge ready (Cloudflare, Vercel, Deno, Bun - all first-class)
• Battle tested (70,000+ monthly downloads and growing)
• Open source (MIT licensed, transparent development)

web-push served its era well. But if you're deploying to modern infrastructure, you deserve a modern foundation.

Get Started Now

npm install @pushforge/builder

• Documentation: github.com/draphy/pushforge
• npm: npmjs.com/package/@pushforge/builder
• Playground: pushforge.draphy.org

PushForge is MIT licensed and open source. Created by David Raphi.

Have questions? Open an issue. Found a bug? PRs welcome. Building something cool? I'd love to hear about it.