Top Builders

Explore the top contributors showcasing the highest number of app submissions within our community.

Cloudflare

Cloudflare is a leading connectivity cloud company that provides web infrastructure and website security services to millions of customers worldwide. The company operates one of the world's largest networks, spanning over 330 cities in more than 120 countries, delivering content delivery network services, DDoS mitigation, Internet security, and distributed domain name server services. With its comprehensive developer platform, Cloudflare empowers developers to build, deploy, and scale applications globally without managing traditional infrastructure.

General
AuthorCloudflare, Inc.
WebsiteCloudflare
Documentationhttps://developers.cloudflare.com/
TypeWeb Infrastructure & Security Platform
Founded2009
HeadquartersSan Francisco, California

Core Services

Content Delivery Network (CDN)

  • Global network of data centers for faster content delivery
  • Automatic content optimization and compression
  • Image optimization and resizing
  • Static asset caching at edge locations

Security & Protection

  • DDoS protection and mitigation
  • Web Application Firewall (WAF)
  • Bot management and threat detection
  • SSL/TLS encryption and certificates
  • Zero Trust security solutions

DNS & Domain Services

  • Authoritative DNS hosting
  • DNS over HTTPS (DoH) and DNS over TLS (DoT)
  • Domain registration and management
  • DNSSEC support

Developer Platform

  • Cloudflare Workers (serverless computing)
  • Pages (static site hosting)
  • R2 object storage
  • D1 SQL database
  • KV key-value storage
  • Durable Objects for stateful applications

Key Features

  • Global Scale: Network presence in 330+ cities worldwide
  • Performance: Automatic optimization for speed and efficiency
  • Security: Enterprise-grade protection against cyber threats
  • Reliability: 99.99%+ uptime with built-in redundancy
  • Developer-Friendly: Comprehensive APIs and tooling
  • Cost-Effective: Free tier available with scalable pricing

Use Cases

  • Website acceleration and performance optimization
  • DDoS protection and security hardening
  • Serverless application development
  • API gateway and edge computing
  • Global content distribution
  • Zero Trust network access
  • IoT device connectivity
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Cloudflare AI Technologies Hackathon projects

Discover innovative solutions crafted with Cloudflare AI Technologies, developed by our community members during our engaging hackathons.

Sendero — Agentic travel ops on Arc

Sendero — Agentic travel ops on Arc

Sendero turns messy travel requests into quotes, bookings, refunds, invoices, and on-chain settlement trails. Agent layer on Vercel Workflows + Fluid Compute (durable, encrypted, resumable). Money layer on Arc. Two revenue legs from day one. Clerk Billing gates SaaS tiers; x402 nanopayments meter every search, policy check, and tool call in micro-USDC, batched and settled on Arc L2 in one userOp that atomically fans funds to vendor + agency commission + Sendero fee + reputation tip. Card rails can't do atomic multi-leg settlement — Arc unlocks it. On-chain core: SenderoGuestEscrow (0x640e15B2B7cBa421c93dA1514f8E6Ba3e11f8515, Arc Testnet, chain 5042002, verified). Peanut-style payment links plus a travel state machine — reserve → commit → confirm → settle — with recipient-bound ECDSA signatures, optional OTP claimCodeHash, upper-bound reservations for fare drift, buyer reclaim on timeout. Sits beside ERC-8183 escrow and ERC-8004 agent identity/reputation. Self-hosted Ponder indexer keeps events in Postgres + GraphQL. Wallets: Circle Modular Wallets (passkey MSCAs for travelers and guests) + Circle Developer-Controlled Wallets (treasury), both on Arc. Circle App Kit powers swap (USDC↔EURC), CCTP bridge, send, and unified balances across testnets. Settlement uses Circle Nanopayments + Gateway to batch thousands of off-chain signatures into one on-chain tx, eliminating per-payment gas. Souvenir NFTs ship via Circle's SCP ERC-1155 template + Gas Station; Webhooks + Event Monitors feed the indexer. Beyond flights and hotels: visa-aware quotes via Sherpa with MRZ-validated PassportVault (pgcrypto AES-256, per-tenant DEK), Gemini OCR with Zod-pinned outputs, Google Maps travel-safety briefs, and an MCP + llms.txt + OpenAPI surface so other agents can book through Sendero by spec.

Goodlady Authenticity Seal X Circle

Goodlady Authenticity Seal X Circle

Goodlady Finance Authenticity Seal is a payment and authenticity infrastructure that integrates Circle’s USDC and web3 capabilities into the Agent Goodlady lending ecosystem. It separates frontend and backend concerns to work around edge-runtime constraints, running a React/Vite frontend on Cloud while delegating all Circle SDK operations to a dedicated Node.js backend. The backend, implemented with Node.js and Express, uses the Circle SDK to create and track payments, generate and manage wallets, perform CCTP cross-chain USDC transfers, and verify webhook signatures for trusted event handling. It exposes these capabilities through API endpoints that the frontend can call via standard fetch requests, allowing the UI to stay lightweight while the backend handles sensitive operations and credentials via environment variables such as CIRCLE_API_KEY, CIRCLE_ENVIRONMENT, and CIRCLE_WEBHOOK_SECRET. Deployment is designed for scalability and security using Google Cloud Run for the backend, providing serverless autoscaling, pay-per-use economics, and a public HTTPS endpoint required for Circle webhook delivery. The integration guides you through setting up the Google Cloud SDK, configuring a project, and wiring environment variables so the Circle SDK can run in both sandbox and production. On the Circle side, a dedicated webhook is configured to point to the Cloud Run URL, subscribing to events like payment.completed and payment.failed, which lets Goodlady record and act on final payment states in a tamper-resistant way. On the frontend, This architecture supports Goodlady’s Authenticity Seal concept by tying verified, signature-checked payment events to the platform’s trust and underwriting logic, enabling a consistent, scalable pattern for web3-native payments, wallet management, and authenticity verification across Goodlady’s credit and lending products.

AlphaDrip

AlphaDrip

AlphaDrip is an x402-monetized trading signal API where every call is a real on-chain USDC settlement on Arc Testnet. No subscriptions, no middlemen, no batching abstractions — just direct per-call payment at $0.003 USDC, settled in sub-second time via EIP-3009 transferWithAuthorization on Arc's USDC contract. The cascade engine connects to Hyperliquid's public WebSocket trade feed, evaluates BTC trade volume against a rolling baseline, and fires liquidation cascade signals when volume spikes >2.5× with directional bias >70%. Each signal is exposed via a paywalled HTTP endpoint that returns 402 Payment Required, advertising Arc Testnet USDC as the accepted asset. Consumers sign an EIP-3009 authorization off-chain (no Gateway deposit required), the producer relays it on-chain as a real USDC transfer, the signal payload is returned with the Arc transaction hash. Every paid call is independently verifiable on the Arc Block Explorer. A recorded 326-second demo session produced 163 paid on-chain settlements, 263 cascade signals fired, $0.483 USDC settled by the consumer, $0.489 USDC earned by the producer (the difference being the producer's gas reimbursement of ~$0.0019 per tx). Net producer margin after gas: 36% — economically viable per-call pricing that's impossible on any other L1. The original architecture targeted Circle Gateway's batched-x402 facilitator. We discovered that endpoint returns "unsupported_network" for Arc Testnet (eip155:5042002) — a real bug we documented and submitted as Circle product feedback. Per the Arc team's explicit Discord guidance ("you can build x402-style logic on Arc, you'll need to implement the logic yourself"), we pivoted to direct EIP-3009 settlement, which works perfectly because Arc's USDC at 0x3600... is a fully EIP-3009-compliant Circle FiatTokenV2. Live demo: https://alphadrip.baserep.xyz Source: https://github.com/Makabeez/alphadrip

P402 Meter: Proof-of-Spend for AI Agents

P402 Meter: Proof-of-Spend for AI Agents

P402 Meter is Proof-of-Spend infrastructure for AI agents. Today, AI systems consume tokens, call tools, trigger workflows, and create costs, but payments still happen through subscriptions, invoices, and opaque platform billing. P402 Meter changes this model by turning each AI action into a priced, governed, and auditable USDC event on Arc. The demo uses a synthetic healthcare prior authorization workflow. Gemini parses the intake packet, extracts administrative review fields, streams the review process, and records each meaningful unit of AI work into a live payment ledger. Every event has a price, budget status, receipt trail, and settlement reference. The project uses Arc, USDC, Circle Nanopayments, Circle Wallets, Circle Gateway, and x402-style payment logic to show why sub-cent AI commerce becomes practical on Arc. Each action is priced below $0.01, with 50+ transaction events and a margin comparison against Ethereum gas costs and traditional card rails. P402 Meter is not only a healthcare demo. It is a payment primitive for agentic commerce. Agents need budgets. Businesses need audit trails. Developers need monetization beyond subscriptions. P402 Meter gives each AI unit of work a receipt.

GhostAgentNinja

GhostAgentNinja

The problem: AI agents need email to interact with the world, but connecting them to Gmail means handing over full mailbox access — creating prompt injection risk, credential theft, and platform lock-in. Existing agent inboxes generate addresses but don't provide ownership, sovereignty, or on-chain identity. GhostAgent.ninja solves this with a new primitive: NFTs that aren't just assets, but autonomous digital entities capable of communication, ownership, and economic activity. With nftmail.box, any NFT holder gets an ENS-linked agent email (agent@nftmail.box), a Gnosis Safe treasury, and Story Protocol IP licensing — all under one sovereign on-chain identity. Emails arrive via Zoho, route through Cloudflare Workers with ECIES encryption, and cleartext is deleted immediately after processing. Zero cleartext footprint by architecture.

Lunar Graph - AI-Powered Fraud Ring Detection

Lunar Graph - AI-Powered Fraud Ring Detection

Deriv's compliance teams face 2,100+ fraud alerts weekly, 95% false positives. Each investigation takes 25+ minutes, creating weeks-long backlogs. Meanwhile, fraud rings go undetected because every individual account passes KYC, AML, and risk checks perfectly. The insight: fraud is invisible individually — it's obvious at the network level. LunarGraph maps every entity (partners, sub-affiliates, clients, trades, payments) into a knowledge graph, then deploys three AI agents in parallel: Graph Anomaly Agent — Detects structural patterns like one partner controlling 20+ accounts through layered sub-affiliates sharing IP addresses and device fingerprints. Temporal Intelligence Agent — Identifies coordinated opposite BUY/SELL trades placed within 30-second windows across linked accounts (mirror trading for commission extraction). Behavioral Trajectory Agent — Compares partner behavior against known fraud signatures to predict emerging schemes 2-3 weeks before activation. The platform connects to the real Deriv WebSocket API. Partners invite affiliates via unique referral links, each generating a tracked trading account with a TradingView-style interface. Every trade feeds into the graph engine for real-time correlation analysis. An AI Copilot synthesizes findings into case reports in 28 seconds via natural language queries. Results: 99.86% alert reduction, 28-second case generation (vs 25min manual), 14-day predictive lead time, $178K+ fraud exposure detected across 3 rings and 73 entities.