2761 words
14 minutes
Building Lightning-Fast Serverless APIs with Cloudflare Workers
Anubhav Gain
2025-08-10
Cloud
cloudflare
/
workers
/
serverless
/
edge-computing
/
api
/
javascript
/
performance
/
distributed-systems

Building Lightning-Fast Serverless APIs with Cloudflare Workers#

Cloudflare Workers revolutionize serverless computing by running your code at the edge in 330+ data centers worldwide. Unlike traditional serverless platforms that suffer from cold starts, Workers use V8 Isolates to achieve sub-millisecond startup times and deliver responses in under 10ms globally.

Table of Contents#

Why Cloudflare Workers?#

Performance Advantages#

  • Zero Cold Starts: V8 Isolates eliminate cold start latency completely
  • Global Distribution: Code runs in 330+ locations automatically
  • 50ms CPU Time: Sufficient for most API operations
  • Sub-10ms Response Times: Achievable for cached and optimized workloads
  • Automatic Scaling: Handle millions of requests without configuration

Cost Efficiency#

// Cost comparison for 10M requests/month
// AWS Lambda: ~$20 + data transfer costs
// Cloudflare Workers: $5 (paid plan) or FREE (100K requests/day)

Project Setup#

1. Initialize Worker Project#

Terminal window
# Install Wrangler CLI
npm install -g wrangler


# Create new project
npm create cloudflare@latest my-api
# Select "Hello World" Worker
# Choose TypeScript for type safety


# Navigate to project
cd my-api

2. Project Structure#

src/index.ts
export interface Env {
  // KV Namespaces
  CACHE: KVNamespace;
  RATE_LIMIT: KVNamespace;


  // D1 Database
  DB: D1Database;


  // Secrets
  API_KEY: string;
  JWT_SECRET: string;


  // Durable Objects
  COUNTER: DurableObjectNamespace;
}


export default {
  async fetch(
    request: Request,
    env: Env,
    ctx: ExecutionContext
  ): Promise<Response> {
    return handleRequest(request, env, ctx);
  },
};

Building a Production API#

1. Advanced Router Implementation#

src/router.ts
type Handler = (
  request: Request,
  env: Env,
  ctx: ExecutionContext,
  params: Record<string, string>
) => Promise<Response>;


class Router {
  private routes: Map<string, Map<string, Handler>> = new Map();
  private middlewares: Array<Handler> = [];


  constructor() {
    ['GET', 'POST', 'PUT', 'DELETE', 'PATCH'].forEach(method => {
      this.routes.set(method, new Map());
    });
  }


  use(middleware: Handler) {
    this.middlewares.push(middleware);
    return this;
  }


  get(path: string, handler: Handler) {
    this.routes.get('GET')?.set(path, handler);
    return this;
  }


  post(path: string, handler: Handler) {
    this.routes.get('POST')?.set(path, handler);
    return this;
  }


  async handle(request: Request, env: Env, ctx: ExecutionContext): Promise<Response> {
    const url = new URL(request.url);
    const method = request.method;
    const routes = this.routes.get(method);


    if (!routes) {
      return new Response('Method Not Allowed', { status: 405 });
    }


    // Apply middlewares
    for (const middleware of this.middlewares) {
      const response = await middleware(request, env, ctx, {});
      if (response.status !== 200) return response;
    }


    // Match routes with parameters
    for (const [pattern, handler] of routes) {
      const params = this.matchRoute(pattern, url.pathname);
      if (params) {
        return handler(request, env, ctx, params);
      }
    }


    return new Response('Not Found', { status: 404 });
  }


  private matchRoute(pattern: string, path: string): Record<string, string> | null {
    const patternParts = pattern.split('/');
    const pathParts = path.split('/');


    if (patternParts.length !== pathParts.length) return null;


    const params: Record<string, string> = {};


    for (let i = 0; i < patternParts.length; i++) {
      if (patternParts[i].startsWith(':')) {
        params[patternParts[i].slice(1)] = pathParts[i];
      } else if (patternParts[i] !== pathParts[i]) {
        return null;
      }
    }


    return params;
  }
}


export default Router;

2. Authentication Middleware#

src/middleware/auth.ts
import jwt from '@tsndr/cloudflare-worker-jwt';


export async function authenticate(
  request: Request,
  env: Env,
  ctx: ExecutionContext,
  params: Record<string, string>
): Promise<Response> {
  const authorization = request.headers.get('Authorization');


  if (!authorization || !authorization.startsWith('Bearer ')) {
    return new Response('Unauthorized', { status: 401 });
  }


  const token = authorization.slice(7);


  try {
    const isValid = await jwt.verify(token, env.JWT_SECRET);


    if (!isValid) {
      return new Response('Invalid token', { status: 401 });
    }


    const decoded = jwt.decode(token);
    // Attach user info to request for use in handlers
    (request as any).user = decoded.payload;


    return new Response('OK', { status: 200 });
  } catch (error) {
    return new Response('Invalid token', { status: 401 });
  }
}


export async function generateToken(userId: string, env: Env): Promise<string> {
  const token = await jwt.sign({
    userId,
    exp: Math.floor(Date.now() / 1000) + (60 * 60 * 24), // 24 hours
  }, env.JWT_SECRET);


  return token;
}

3. Rate Limiting with Durable Objects#

src/rateLimiter.ts
export class RateLimiter {
  private state: DurableObjectState;
  private requests: Map<string, number[]> = new Map();


  constructor(state: DurableObjectState) {
    this.state = state;
  }


  async fetch(request: Request): Promise<Response> {
    const url = new URL(request.url);
    const key = url.searchParams.get('key') || 'default';
    const limit = parseInt(url.searchParams.get('limit') || '100');
    const window = parseInt(url.searchParams.get('window') || '60');


    const now = Date.now();
    const windowStart = now - (window * 1000);


    // Get existing requests for this key
    let timestamps = this.requests.get(key) || [];


    // Filter out old requests
    timestamps = timestamps.filter(ts => ts > windowStart);


    // Check if limit exceeded
    if (timestamps.length >= limit) {
      return new Response(JSON.stringify({
        allowed: false,
        remaining: 0,
        resetAt: Math.min(...timestamps) + (window * 1000),
      }), {
        headers: { 'Content-Type': 'application/json' },
      });
    }


    // Add current request
    timestamps.push(now);
    this.requests.set(key, timestamps);


    // Store state
    await this.state.storage.put(key, timestamps);


    return new Response(JSON.stringify({
      allowed: true,
      remaining: limit - timestamps.length,
      resetAt: now + (window * 1000),
    }), {
      headers: { 'Content-Type': 'application/json' },
    });
  }
}


// Middleware to use rate limiter
export async function rateLimit(
  request: Request,
  env: Env,
  ctx: ExecutionContext
): Promise<Response> {
  const clientIp = request.headers.get('CF-Connecting-IP') || 'unknown';
  const id = env.RATE_LIMITER.idFromName(clientIp);
  const limiter = env.RATE_LIMITER.get(id);


  const url = new URL(request.url);
  const rateLimitUrl = `https://rate-limiter.internal/?key=${clientIp}&limit=100&window=60`;


  const response = await limiter.fetch(rateLimitUrl);
  const result = await response.json();


  if (!result.allowed) {
    return new Response('Rate limit exceeded', {
      status: 429,
      headers: {
        'X-RateLimit-Remaining': '0',
        'X-RateLimit-Reset': new Date(result.resetAt).toISOString(),
      },
    });
  }


  return new Response('OK', { status: 200 });
}

4. Database Integration with D1#

src/database/schema.sql
CREATE TABLE IF NOT EXISTS users (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  email TEXT UNIQUE NOT NULL,
  username TEXT UNIQUE NOT NULL,
  password_hash TEXT NOT NULL,
  created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
);


CREATE TABLE IF NOT EXISTS posts (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  user_id INTEGER NOT NULL,
  title TEXT NOT NULL,
  content TEXT NOT NULL,
  slug TEXT UNIQUE NOT NULL,
  published BOOLEAN DEFAULT false,
  created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME DEFAULT CURRENT_TIMESTAMP,
  FOREIGN KEY (user_id) REFERENCES users(id)
);


CREATE INDEX idx_posts_slug ON posts(slug);
CREATE INDEX idx_posts_user_id ON posts(user_id);
src/models/post.ts
export interface Post {
  id: number;
  userId: number;
  title: string;
  content: string;
  slug: string;
  published: boolean;
  createdAt: string;
  updatedAt: string;
}


export class PostModel {
  constructor(private db: D1Database) {}


  async findAll(limit = 10, offset = 0): Promise<Post[]> {
    const { results } = await this.db
      .prepare('SELECT * FROM posts WHERE published = ? ORDER BY created_at DESC LIMIT ? OFFSET ?')
      .bind(true, limit, offset)
      .all();


    return results as Post[];
  }


  async findBySlug(slug: string): Promise<Post | null> {
    const result = await this.db
      .prepare('SELECT * FROM posts WHERE slug = ? AND published = ?')
      .bind(slug, true)
      .first();


    return result as Post | null;
  }


  async create(post: Omit<Post, 'id' | 'createdAt' | 'updatedAt'>): Promise<Post> {
    const { meta } = await this.db
      .prepare(
        'INSERT INTO posts (user_id, title, content, slug, published) VALUES (?, ?, ?, ?, ?)'
      )
      .bind(post.userId, post.title, post.content, post.slug, post.published)
      .run();


    return this.findById(meta.last_row_id as number);
  }


  async update(id: number, updates: Partial<Post>): Promise<Post> {
    const setClause = Object.keys(updates)
      .map(key => `${key} = ?`)
      .join(', ');


    await this.db
      .prepare(`UPDATE posts SET ${setClause}, updated_at = CURRENT_TIMESTAMP WHERE id = ?`)
      .bind(...Object.values(updates), id)
      .run();


    return this.findById(id);
  }


  private async findById(id: number): Promise<Post> {
    const result = await this.db
      .prepare('SELECT * FROM posts WHERE id = ?')
      .bind(id)
      .first();


    if (!result) throw new Error('Post not found');
    return result as Post;
  }
}

5. Advanced Caching Strategy#

src/cache/strategy.ts
export class CacheStrategy {
  private kv: KVNamespace;
  private cache: Cache;


  constructor(kv: KVNamespace) {
    this.kv = kv;
    this.cache = caches.default;
  }


  async get(key: string, request?: Request): Promise<any> {
    // Try browser cache first
    if (request) {
      const cached = await this.cache.match(request);
      if (cached) return cached;
    }


    // Try KV store
    const kvData = await this.kv.get(key, 'json');
    if (kvData) return kvData;


    return null;
  }


  async set(
    key: string,
    value: any,
    ttl: number = 3600,
    request?: Request,
    response?: Response
  ): Promise<void> {
    // Store in KV
    await this.kv.put(key, JSON.stringify(value), {
      expirationTtl: ttl,
      metadata: {
        cachedAt: Date.now(),
        ttl,
      },
    });


    // Store in browser cache if response provided
    if (request && response) {
      const cacheResponse = new Response(response.body, response);
      cacheResponse.headers.set('Cache-Control', `public, max-age=${ttl}`);
      await this.cache.put(request, cacheResponse);
    }
  }


  async invalidate(pattern: string): Promise<void> {
    // List all keys matching pattern
    const list = await this.kv.list({ prefix: pattern });


    // Delete matching keys
    await Promise.all(
      list.keys.map(key => this.kv.delete(key.name))
    );
  }


  // Stale-while-revalidate pattern
  async swr<T>(
    key: string,
    fetcher: () => Promise<T>,
    ttl: number = 3600,
    staleTime: number = 86400
  ): Promise<T> {
    const cached = await this.kv.getWithMetadata(key, 'json');


    if (cached.value) {
      const age = Date.now() - (cached.metadata?.cachedAt || 0);


      // Return fresh cache
      if (age < ttl * 1000) {
        return cached.value as T;
      }


      // Return stale cache and revalidate in background
      if (age < staleTime * 1000) {
        // Don't await - run in background
        fetcher().then(fresh =>
          this.set(key, fresh, ttl)
        );
        return cached.value as T;
      }
    }


    // Fetch fresh data
    const fresh = await fetcher();
    await this.set(key, fresh, ttl);
    return fresh;
  }
}

Complete API Implementation#

src/index.ts
import Router from './router';
import { authenticate } from './middleware/auth';
import { rateLimit } from './rateLimiter';
import { PostModel } from './models/post';
import { CacheStrategy } from './cache/strategy';


const router = new Router();


// Apply global middlewares
router.use(rateLimit);


// Public routes
router.get('/api/posts', async (request, env, ctx) => {
  const url = new URL(request.url);
  const page = parseInt(url.searchParams.get('page') || '1');
  const limit = Math.min(parseInt(url.searchParams.get('limit') || '10'), 100);
  const offset = (page - 1) * limit;


  const cache = new CacheStrategy(env.CACHE);
  const cacheKey = `posts:${page}:${limit}`;


  // Use stale-while-revalidate
  const posts = await cache.swr(
    cacheKey,
    async () => {
      const model = new PostModel(env.DB);
      return model.findAll(limit, offset);
    },
    300, // 5 minutes fresh
    3600 // 1 hour stale
  );


  return new Response(JSON.stringify({
    data: posts,
    page,
    limit,
  }), {
    headers: {
      'Content-Type': 'application/json',
      'Cache-Control': 'public, max-age=60',
    },
  });
});


router.get('/api/posts/:slug', async (request, env, ctx, params) => {
  const { slug } = params;


  const cache = new CacheStrategy(env.CACHE);
  const cacheKey = `post:${slug}`;


  const post = await cache.swr(
    cacheKey,
    async () => {
      const model = new PostModel(env.DB);
      return model.findBySlug(slug);
    },
    600, // 10 minutes
    7200 // 2 hours stale
  );


  if (!post) {
    return new Response('Not Found', { status: 404 });
  }


  return new Response(JSON.stringify(post), {
    headers: {
      'Content-Type': 'application/json',
      'Cache-Control': 'public, max-age=300',
    },
  });
});


// Protected routes
router.use(authenticate); // Apply auth to remaining routes


router.post('/api/posts', async (request, env, ctx) => {
  const body = await request.json();
  const user = (request as any).user;


  const model = new PostModel(env.DB);
  const post = await model.create({
    ...body,
    userId: user.userId,
  });


  // Invalidate cache
  const cache = new CacheStrategy(env.CACHE);
  await cache.invalidate('posts:');


  return new Response(JSON.stringify(post), {
    status: 201,
    headers: { 'Content-Type': 'application/json' },
  });
});


router.put('/api/posts/:id', async (request, env, ctx, params) => {
  const { id } = params;
  const body = await request.json();


  const model = new PostModel(env.DB);
  const post = await model.update(parseInt(id), body);


  // Invalidate related caches
  const cache = new CacheStrategy(env.CACHE);
  await Promise.all([
    cache.invalidate('posts:'),
    cache.invalidate(`post:${post.slug}`),
  ]);


  return new Response(JSON.stringify(post), {
    headers: { 'Content-Type': 'application/json' },
  });
});


// Export handler
export default {
  async fetch(request: Request, env: Env, ctx: ExecutionContext): Promise<Response> {
    try {
      // Add CORS headers
      if (request.method === 'OPTIONS') {
        return new Response(null, {
          headers: {
            'Access-Control-Allow-Origin': '*',
            'Access-Control-Allow-Methods': 'GET, POST, PUT, DELETE, OPTIONS',
            'Access-Control-Allow-Headers': 'Content-Type, Authorization',
          },
        });
      }


      const response = await router.handle(request, env, ctx);


      // Add CORS to all responses
      response.headers.set('Access-Control-Allow-Origin', '*');


      return response;
    } catch (error) {
      console.error('Error:', error);
      return new Response('Internal Server Error', { status: 500 });
    }
  },
};


// Export Durable Object
export { RateLimiter } from './rateLimiter';

Deployment Configuration#

1. Wrangler Configuration#

wrangler.toml
name = "my-api"
main = "src/index.ts"
compatibility_date = "2025-01-01"


[env.production]
kv_namespaces = [
  { binding = "CACHE", id = "your-cache-kv-id" },
  { binding = "RATE_LIMIT", id = "your-rate-limit-kv-id" }
]


[[env.production.d1_databases]]
binding = "DB"
database_name = "my-api-db"
database_id = "your-d1-database-id"


[[env.production.durable_objects.bindings]]
name = "RATE_LIMITER"
class_name = "RateLimiter"


[env.production.vars]
API_KEY = "your-api-key"


# Secrets (set via wrangler secret)
# JWT_SECRET = "set-via-wrangler-secret"

2. Database Setup#

Terminal window
# Create D1 database
wrangler d1 create my-api-db


# Apply migrations
wrangler d1 execute my-api-db --file=./src/database/schema.sql


# Create KV namespaces
wrangler kv:namespace create CACHE
wrangler kv:namespace create RATE_LIMIT


# Set secrets
wrangler secret put JWT_SECRET

3. Deploy to Production#

Terminal window
# Deploy to Cloudflare
wrangler deploy --env production


# View logs
wrangler tail --env production


# Test the API
curl https://my-api.username.workers.dev/api/posts

Performance Optimization#

1. Smart Caching Headers#

function setCacheHeaders(response: Response, options: {
  public?: boolean;
  maxAge?: number;
  sMaxAge?: number;
  staleWhileRevalidate?: number;
}): Response {
  const parts = [];


  if (options.public) parts.push('public');
  if (options.maxAge) parts.push(`max-age=${options.maxAge}`);
  if (options.sMaxAge) parts.push(`s-maxage=${options.sMaxAge}`);
  if (options.staleWhileRevalidate) {
    parts.push(`stale-while-revalidate=${options.staleWhileRevalidate}`);
  }


  response.headers.set('Cache-Control', parts.join(', '));
  return response;
}

2. Request Coalescing#

class RequestCoalescer {
  private pending = new Map<string, Promise<Response>>();


  async fetch(
    key: string,
    fetcher: () => Promise<Response>
  ): Promise<Response> {
    // Return existing promise if request is in flight
    const existing = this.pending.get(key);
    if (existing) return existing.then(r => r.clone());


    // Create new promise
    const promise = fetcher();
    this.pending.set(key, promise);


    try {
      const response = await promise;
      return response;
    } finally {
      // Clean up after request completes
      setTimeout(() => this.pending.delete(key), 100);
    }
  }
}

3. Response Compression#

async function compressResponse(response: Response): Promise<Response> {
  const acceptEncoding = response.headers.get('Accept-Encoding') || '';


  if (!acceptEncoding.includes('gzip')) return response;


  const compressed = new Response(
    response.body?.pipeThrough(new CompressionStream('gzip')),
    response
  );


  compressed.headers.set('Content-Encoding', 'gzip');
  compressed.headers.delete('Content-Length');


  return compressed;
}

Monitoring and Analytics#

1. Custom Analytics#

interface Analytics {
  requestCount: number;
  errorCount: number;
  avgResponseTime: number;
  endpoints: Map<string, number>;
}


class AnalyticsCollector {
  async track(
    request: Request,
    response: Response,
    duration: number,
    env: Env
  ): Promise<void> {
    const url = new URL(request.url);
    const key = `analytics:${new Date().toISOString().slice(0, 10)}`;


    const existing = await env.CACHE.get<Analytics>(key, 'json') || {
      requestCount: 0,
      errorCount: 0,
      avgResponseTime: 0,
      endpoints: {},
    };


    existing.requestCount++;
    if (response.status >= 400) existing.errorCount++;
    existing.avgResponseTime =
      (existing.avgResponseTime * (existing.requestCount - 1) + duration) /
      existing.requestCount;


    const endpoint = `${request.method} ${url.pathname}`;
    existing.endpoints[endpoint] = (existing.endpoints[endpoint] || 0) + 1;


    await env.CACHE.put(key, JSON.stringify(existing), {
      expirationTtl: 86400 * 7, // Keep for 7 days
    });
  }
}

2. Error Tracking#

class ErrorTracker {
  async log(error: Error, request: Request, env: Env): Promise<void> {
    const errorData = {
      message: error.message,
      stack: error.stack,
      url: request.url,
      method: request.method,
      headers: Object.fromEntries(request.headers),
      timestamp: new Date().toISOString(),
      cf: request.cf,
    };


    // Store in KV for analysis
    const key = `error:${Date.now()}:${Math.random().toString(36).substr(2, 9)}`;
    await env.CACHE.put(key, JSON.stringify(errorData), {
      expirationTtl: 86400 * 30, // 30 days
    });


    // Send to external service if configured
    if (env.SENTRY_DSN) {
      await this.sendToSentry(errorData, env.SENTRY_DSN);
    }
  }


  private async sendToSentry(data: any, dsn: string): Promise<void> {
    // Implement Sentry integration
  }
}

Security Best Practices#

1. Input Validation#

import { z } from 'zod';


const PostSchema = z.object({
  title: z.string().min(1).max(200),
  content: z.string().min(1).max(10000),
  slug: z.string().regex(/^[a-z0-9-]+$/),
  published: z.boolean().optional(),
});


function validateInput<T>(schema: z.ZodSchema<T>, data: unknown): T {
  const result = schema.safeParse(data);


  if (!result.success) {
    throw new ValidationError(result.error.issues);
  }


  return result.data;
}

2. SQL Injection Prevention#

// Always use parameterized queries
// NEVER concatenate user input into SQL strings


// BAD - Vulnerable to SQL injection
const query = `SELECT * FROM posts WHERE slug = '${userInput}'`;


// GOOD - Safe parameterized query
const query = env.DB
  .prepare('SELECT * FROM posts WHERE slug = ?')
  .bind(userInput);

3. CORS Configuration#

function configureCORS(request: Request, response: Response): Response {
  const origin = request.headers.get('Origin');
  const allowedOrigins = [
    'https://example.com',
    'https://app.example.com',
  ];


  if (origin && allowedOrigins.includes(origin)) {
    response.headers.set('Access-Control-Allow-Origin', origin);
    response.headers.set('Access-Control-Allow-Credentials', 'true');
  }


  response.headers.set(
    'Access-Control-Allow-Methods',
    'GET, POST, PUT, DELETE, OPTIONS'
  );
  response.headers.set(
    'Access-Control-Allow-Headers',
    'Content-Type, Authorization'
  );
  response.headers.set('Access-Control-Max-Age', '86400');


  return response;
}

Testing#

1. Unit Tests#

test/api.test.ts
import { unstable_dev } from 'wrangler';


describe('API Tests', () => {
  let worker;


  beforeAll(async () => {
    worker = await unstable_dev('src/index.ts', {
      experimental: { disableExperimentalWarning: true },
    });
  });


  afterAll(async () => {
    await worker.stop();
  });


  it('should return posts', async () => {
    const response = await worker.fetch('/api/posts');
    const data = await response.json();


    expect(response.status).toBe(200);
    expect(data).toHaveProperty('data');
    expect(Array.isArray(data.data)).toBe(true);
  });


  it('should require authentication for POST', async () => {
    const response = await worker.fetch('/api/posts', {
      method: 'POST',
      body: JSON.stringify({ title: 'Test' }),
    });


    expect(response.status).toBe(401);
  });
});

2. Load Testing#

Terminal window
# Install autocannon
npm install -g autocannon


# Run load test
autocannon \
  -c 100 \
  -d 30 \
  -p 10 \
  https://my-api.username.workers.dev/api/posts


# Expected results:
# - 50,000+ requests/second
# - p99 latency < 50ms
# - Zero errors under normal load

Cost Optimization#

1. Request Minimization#

// Batch multiple operations into single request
router.post('/api/batch', async (request, env) => {
  const { operations } = await request.json();


  const results = await Promise.all(
    operations.map(op => executeOperation(op, env))
  );


  return new Response(JSON.stringify(results), {
    headers: { 'Content-Type': 'application/json' },
  });
});

2. KV Storage Optimization#

// Use KV list operations efficiently
async function bulkDelete(prefix: string, env: Env): Promise<void> {
  let cursor;


  do {
    const list = await env.CACHE.list({
      prefix,
      limit: 1000,
      cursor,
    });


    await Promise.all(
      list.keys.map(key => env.CACHE.delete(key.name))
    );


    cursor = list.cursor;
  } while (cursor);
}

Conclusion#

Cloudflare Workers provide an incredibly powerful platform for building globally distributed, lightning-fast APIs with minimal operational overhead. By leveraging V8 Isolates, edge computing, and Cloudflare’s global network, you can achieve performance levels that are impossible with traditional serverless platforms.

Key Takeaways#

  1. Zero cold starts make Workers ideal for latency-sensitive applications
  2. Global distribution ensures low latency for users worldwide
  3. Integrated storage (KV, D1, R2) provides a complete backend solution
  4. Cost-effective pricing model with generous free tier
  5. Security by default with built-in DDoS protection and WAF

Next Steps#

  • Implement WebSocket support using Durable Objects
  • Add real-time features with Server-Sent Events
  • Integrate with Cloudflare R2 for file storage
  • Implement GraphQL API layer
  • Add observability with Cloudflare Analytics

Resources#

Building Lightning-Fast Serverless APIs with Cloudflare Workers
https://mranv.pages.dev/posts/cloudflare-workers-edge-computing-guide/
Author
Anubhav Gain
Published at
2025-08-10
License
CC BY-NC-SA 4.0
Enterprise Zero Trust Architecture with Cloudflare Access - Complete Implementation Guide
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