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Awesome Projects

Discover innovative applications, tools, and services built on the x402 payment protocol, curated by the community.

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x402 Enabled APIs & Services

Platforms that implement or enable payments, monetization, or x402 integration.

  • 402links - Monetize any link with HTTP 402

  • proxy402 - Monetize any link in seconds

  • Gatepay - Monetize any digital content with crypto payments

  • httpayer - Automated x402 payments for Web2, Web3 and AI Agents

  • snack.money - Send micropayments

  • MCPay - Payments for MCPs

  • Daydreams Router - Generate images, videos, and LLMs in one flow with USDC

  • Meridian - x402 payment rails for the agent economy

  • tip.md - Get rewarded for your open source work in minutes

  • ROZO Bananary - Generate images and pay with x402

  • 402 load network - The x402 toolkit for ANS-104 dataitems

  • xcache.io - Create your own cache, no account required, just pay with x402

  • Einstein AI - AI blockchain intelligence - whale tracking, smart money, launchpad monitoring

  • OpSpawn A2A x402 Gateway - AI agent services with x402 micropayments, Google A2A protocol, and multi-chain support (Base, SKALE, Arbitrum)

  • x402-api - Unified DeFi data API (CoinGecko, DefiLlama, Hyperliquid, GoPlus, Blockchair) with x402 micropayments on Base. MCP server + ElizaOS plugin available. Github

  • x402 AI API — zeroreader - 29 Cloudflare Workers AI models (LLM, Embeddings, Image, Audio, Translation) via x402 micropayments on Base. OpenAI-compatible, streaming, batch. OpenAPI

  • SIBYL - Autonomous crypto intelligence agent on Base - token scoring, rug/honeypot detection, builder value analysis via x402 micropayments

  • PoolPulse - Pre-trade DEX execution signals for autonomous DeFi agents on Base — CLMM slippage, MEV scoring, routing hints for 33 Uniswap V3 + Aerodrome pools. x402 micropayments ($0.001–$0.25 USDC). OpenAPI | Examples

  • MoltGuard - All-in-one trust & integrity API for the x402 agent economy — agent trust scoring, Sybil detection, Polymarket integrity, Ed25519-signed Verifiable Credentials, plus three vertical modules: MT Shopping (BuyerAgentCredentials for agentic commerce), MT Travel (TravelAgentCredentials with delegation chains), and MT Skills (8-point security audits + VerifiedSkillCredentials for AI agent skills). 19 endpoints, x402 micropayments on Base. MCP | Docs

  • API Factory x402 - 100 production-ready x402 APIs for AI agents across crypto, B2B, SEO, security. npm SDK: x402-agent-tools (103 tools).

  • CIPHER x402 - 10 paid endpoints for autonomous crypto intelligence agents: Solana MEV deep-dive (4 chapters), wallet/token scanner, HaveIBeenPwned breach lookup, Jito tip percentile math, GitHub repo-health audit, FRED macro series, Drift exposure risk. USDC on Base. Built on cipher-x402-client + x402-python.

  • Zuluworks AI — Sovereign Shaka PQC-Shield Factory - Autonomous A2A factory on Cloudflare Workers selling 5 post-quantum-hardened agent services via x402 USDC on Base L2: ML-KEM-768 PQC tunnel (NIST FIPS 203), agent trust scoring (KYA), browser rendering, semantic memory, Llama 3.1 inference. CDP facilitator settlement. Agent Card | Bazaar Manifest | MCP

  • agent-marketplace-proxy - x402-gated Google SERP API (DataForSEO upstream). POST /search returns top organic results; agents pay $0.001 USDC per call on Base — no API key, no signup. Reference implementation of the commodity-API-resale pattern in ~80 lines of Express. Source

  • TradingAgents x402 - Multi-agent LLM ticker consensus (powered by TauricResearch/TradingAgents — arXiv:2412.20138). Five specialist analysts + bullish/bearish debate + trader synthesis + risk review + portfolio-manager final decision. Returns structured BUY/HOLD/SELL with confidence and full per-agent reports. $1.00 USDC per call on Base. Source

  • Sentry Forge x402 - Consumer-debt dispute pack generator. One paid call returns an 8-file pack (collector + original-creditor dispute letters, CFPB complaints, credit-bureau disputes, court-records search guide, action checklist, evidence inventory). FDCPA/FCRA-grounded. $0.50 USDC per call on Base. Source

  • Royal Ruby x402 - US consumer-rights law citation lookup (FCRA, FDCPA, TILA, state UDAP statutes, debt-collection rules, credit-reporting timelines). Information-only, no legal advice. $0.05 USDC per call on Base. Source

  • Vault Pro x402 - Obsidian project + agent scaffolder. Returns a complete markdown document (frontmatter, Goal, Success criteria, Decomposition table) fitted to the Vault Pro 70-Templates structure. $0.05 USDC per call on Base. Source

  • Nano Banana x402 - Paid Gemini image generation. gemini-3.1-flash-image-preview wrapped with x402 micropayments. Generate from prompt OR edit existing image; returns base64 PNG, 10 aspect ratios. $0.02 USDC per call on Base. Source

  • Power Pack x402 - Outreach email scorer (Claude Haiku 4.5). Scores subject + body quality, predicted open rate, spam risk, tone, length, personalization, CTA clarity. Returns top 3 specific improvements and a rewritten subject. $0.01 USDC per call on Base. Source

  • SupraPack x402 - Claude skill discovery over a 531-skill curated bundle. Keyword search returns top matching skills with full markdown content, quality score, categories, source repo; optional filters (min_quality, categories, limit). $0.01 USDC per call on Base. Source

  • AgentIAM (Achilles EP) - Agent identity and safety layer with 18 x402 endpoints on Base Mainnet. Safety pillars: NoLeak (execution integrity), MemGuard (state verification), RiskOracle (risk scoring), SecureExec (sandboxed exec), FlowCore (orchestration). Plus code audit, validate, research, DELPHI intelligence + knowledge graph (entity/query/timeline/contradictions), real-time signals (latest/query/publish). $0.001–$0.05 USDC/call. x402scan | MCP Server | Docs

  • Anicca - Autonomous Buddhist AI agent. Self-operating LLM that funds its own compute by selling 5 priced routes: /qa ($0.003 Buddhist Q&A), /research ($0.05 deep research w/ citations), /x-post ($0.01 tweet draft), /pdf/:slug ($5–29 premium PDFs), /build ($50–2000 custom autonomous builds). USDC on Base. MIT-licensed, no human in the loop. Discovery | GitHub | Autonomy spec

  • The Stall - Domain-agnostic x402 capability chassis for AI agents: US stock prices ($0.030/call), market intelligence ($0.50), and concentration-risk scoring ($0.10) on Base mainnet via Coinbase CDP. A2A agent card at /.well-known/agent.json. Built by IntuiTek¹.

  • TWZRD Agent Intel - Trust scoring and x402 micropayment verification MCP for AI agents on Solana. Verify counterparty wallet reputation before transacting: score_agent, preflight_check, resolve_agent (free) + get_trust_receipt (paid via HTTP 402 + USDC on Solana). Zero-install MCP: https://intel.twzrd.xyz/mcp. PyPI: pip install twzrd-agent-intel.

x402 Developer Tools & SDKs

Libraries, SDKs, and dev tools for building with x402.

  • a2a x402 TypeScript library
  • x402 dotnet library
  • mcp-go-x402 - Go SDK for MCP x402
  • x402 Debug Tool - Debugging and testing tool for x402
  • x402 specs - Official specification
  • thirdweb - Infrastructure for AI Agents (supports x402 integrations)
  • x402scan - Explore and analyze x402 transactions
  • corbits - Ready your apps for Agentic Commerce
  • x402station - Discover and monitor x402 services
  • x402magic - Build payment-protected APIs in minutes with TypeScript
  • x402-solana - Solana SDK for x402
  • mogami.tech - SDKs, tools, and services built in Java
  • x402-proxy - curl for x402 paid APIs. CLI and library that auto-pays HTTP 402 responses with USDC on Base and Solana, with MCP stdio proxy for AI agents. npx x402-proxy.
  • x402-python - First Python client for x402 HTTP 402 payments (Linux Foundation spec, v2). Decimal-precise nanopayment conversion, EIP-712 signing, async + sync APIs.
  • cipher-x402-client - Tiny TypeScript client for x402 v2. Zero-config USDC-on-Base, auto-retry on 402 Payment Required.
  • cipher-x402-mcp - MCP server exposing 8 CIPHER x402-gated tools to Claude/Cursor/VS Code. Agents auto-pay USDC per tool call.
  • agenticpay - Open-source TypeScript x402 stack for MCP on Solana: SDK, CLI, paywall middleware, first OSS self-hostable facilitator, Eliza plugin. Hosted devnet endpoint, live Claude Opus demo paying autonomously. MIT. npm: @agenticpay/{sdk,cli,mcp-server,facilitator,eliza-plugin}.

x402 Developer Sandboxes & Testing

Tools and playgrounds to experiment and prototype with x402.

x402 Learning & Community Resources

Educational content, directories, and resource hubs.

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