Awesome Projects

x402 Enabled APIs & Services

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

• 402 load network - The x402 toolkit for ANS-104 dataitems
• 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
• agent-tools.net - Pay-per-call API marketplace for AI agents (page extraction, structured scraping, URL/status checks, robots.txt checks), $0.001-$0.01 USDC per call on Base. Third parties can list their own tool in the directory via a flat x402 listing fee — no accounts needed on either side. Directory | Agent Card | GitHub
• Agent402 - 1,100+ pay-per-call web tools for AI agents: headless browser, live web search, PDF extract/merge/split, image and audio conversion, durable wallet-keyed memory, and ~970 deterministic unit and encoding utilities. USDC on Base (also Polygon, Arbitrum), or free via proof-of-work. Hosted MCP connector + non-custodial buyer SDK. Open-source and self-hostable. GitHub | MCP | OpenAPI | Discovery | Leaderboard
• AgentBodega - Agent-ready paid API catalog with 65 x402-payable JSON resources for search, web fetch, public data, social media, status checks, media conversion, and agent-readiness audits. Base USDC settlement, no API keys. OpenAPI | Discovery | MCP
• 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
• AgentServices - Paid data APIs for AI agents with x402 USDC micropayments on Base. 54 services, 97 paths, 41 x402-paid endpoints, 37 MCP tools. Market data, financial intelligence, onchain analytics, and inference APIs. OpenAPI | Discovery | MCP
• 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
• API Factory x402 - 100 production-ready x402 APIs for AI agents across crypto, B2B, SEO, security. npm SDK: x402-agent-tools (103 tools).
• BridgeNode - OpenAI-compatible AI chat completions (DeepSeek V4 Flash) with x402 micropayments on Solana: pay per request in USDC, no API keys, no signup. From $0.002/request. OpenAPI | Discovery | MCP | llms.txt
• Bug Bounty Intelligence - Smart contract security scanner for AI agents, trained on 27,681 real accepted findings from Sherlock and Code4rena audit competitions. 5 USDC per scan on Base.
• Colombia TRM - Official Superintendencia Financiera daily USD/COP (datos.gov.co mcec-87by), $0.005 USDC on Base. Discovery | OpenAPI | GitHub
• Crest Counterparty Intelligence - Counterparty and credit intelligence for the x402 agent economy: vet who your agent is about to pay (real service vs relayer vs treasury vs buyer), wallet risk, a pre-action risk gate, and an agent credit bureau. Reads the settlement graph at the intent layer. x402 micropayments on Base, no API keys. OpenAPI | Discovery | MCP
• DeFi Signal API - Live Morpho/Aave liquidation and lending intelligence from production bot infrastructure continuously scanning 2,586 Morpho Blue borrowers and 19,000+ Aave V3 positions on Base and Arbitrum. $0.002-$0.010 USDC per call.
• Einstein AI - AI blockchain intelligence - whale tracking, smart money, launchpad monitoring
• Frantic - Bounty board where AI agents claim funded work, deliver artifacts, and are paid USDC on Base only on accepted delivery
• Gatepay - Monetize any digital content with crypto payments
• GPT-5.6 Luna x402 API Gateway - OpenAI-compatible GPT-5.6 Luna Standard chat result for $0.00293 USDC per request on Base, with browser-wallet checkout and quote-first agent fallback; current routes and prepaid packs are in the unified service hub. OpenAPI | Discovery | Service JSON | Source
• httpayer - Automated x402 payments for Web2, Web3 and AI Agents
• InsumerAPI - Signed on-chain condition checks for AI agents: token balances, NFT ownership, EAS attestations, and agent standing (ERC-8004, ERC-7710) across 38 chains, pay-per-call over x402 in USDC on Base, no API key. OpenAPI | Discovery
• Iron City - A sovereign AI agent economy: oracle-verified tools (sealed sandbox), a provably-fair drone-training arena, trustless escrow, and a data broker with sealed-bid auctions. Pay-per-use in USDC on Base. Discovery | MCP
• Israel Tariff x402 API - Pay-per-call access to normalized Israeli customs tariff data from the official Israel Tax Authority open dataset. Base mainnet, 0.0025 USDC per successful lookup. Live endpoint
• JMT x402 Agent Tools — 25 paid x402 endpoints on Base mainnet: web search, AI analysis, crypto/stock data, SEC filings, company intel, news, sentiment, macro dashboard. $0.001-$0.15/call USDC. Local LLM-powered.
• Kerne Protocol - Proof-of-reserves and signed ERC-20 reads for AI agents on Base. GET /reserves ($0.25) returns Kerne's hourly EOA-signed proof-of-reserves attestation for its kUSD synthetic dollar; POST /instant-read ($29) returns an EIP-191 signed read of any ERC-20. USDC on Base via the Coinbase CDP facilitator, indexed in the CDP Bazaar. Every response is independently verifiable (EIP-191); the same signed reserves blob is served free to humans at https://kerne.fi/api/por/signed. OpenAPI | Home
• MCPay - Payments for MCPs
• Meridian - x402 payment rails for the agent economy
• 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
• patternfetch - Market-state briefs for US stocks, ETFs and crypto spot: chart patterns returned with a backtested base rate, sample size and lift against a pattern-free baseline, plus support/resistance, regime and RSI/EMA. Keyless demo endpoint, x402 USDC on Base for credit top-up. Discovery | MCP
• 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 | RAE Fleet catalog
• SIBYL - Autonomous crypto intelligence agent on Base - token scoring, rug/honeypot detection, builder value analysis via x402 micropayments
• 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.
• tip.md - Get rewarded for your open source work in minutes
• true402 - Machine-native x402 marketplace on Base: token rug check with real buy/sell honeypot simulation, address safety, deployer reputation, new pairs, whale swaps, SEO/GEO audits, and LLM inference. ~13 endpoints, $0.001–$0.015 USDC; MCP server npx @true402.dev/mcp-server. OpenAPI | llms.txt
• twitr.sh - Pay-per-call X (Twitter) data for AI agents: reads, search, timelines, lists, communities, 23 bulk extractors, real-time account/keyword monitors (prepaid hours, HMAC-signed webhooks), giveaway draws, trend radar and an AI tweet composer. Volume tools bill per returned item against a mandatory resultsLimit. 14 paid tools + 17 free SIWX endpoints, $0.001-$84 USDC. x402 v2 on Base/Solana plus MPP on Tempo, no API keys. OpenAPI | Discovery | MCP
• 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 AI API — zeroreader - 29 Cloudflare Workers AI models (LLM, Embeddings, Image, Audio, Translation) via x402 micropayments on Base. OpenAI-compatible, streaming, batch. OpenAPI
• x402-api - Unified DeFi data API (CoinGecko, DefiLlama, Hyperliquid, GoPlus, Blockchair) with x402 micropayments on Base. MCP server + ElizaOS plugin available. Github
• xcache.io - Create your own cache, no account required, just pay with x402

x402 Developer Tools & SDKs

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

• @bridgenode/llm - TypeScript SDK for BridgeNode: automatic x402 payments on Solana USDC (gasless, no API keys, pay per request).
• @bridgenode/mcp - MCP server wrapper for BridgeNode: stdio MCP server with automatic x402 payments on Solana USDC (gasless, no API keys, pay per request). One-command install for Claude Code / Cursor.
• a2a x402 TypeScript library
• 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}.
• bridgenode-llm - Python SDK for BridgeNode: automatic x402 payments on Solana USDC (gasless, no API keys, pay per request).
• 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.
• corbits - Ready your apps for Agentic Commerce
• Hilt Pay - Payment-to-access infrastructure for x402 V2 challenge and retry flows on Solana USDC, with settlement verification, receipts, entitlements, atomic usage consumption, webhooks, SDKs, MCP, and A2A discovery.
• mcp-go-x402 - Go SDK for MCP x402
• mogami.tech - SDKs, tools, and services built in Java
• stipend - Non-custodial USDC wallet on Base for AI agents, in Python. Buyer-side x402 auto-pay signed as EIP-3009 (no gas needed), with per-transaction, per-day and per-counterparty caps and a destination allowlist enforced in code before signing. Local stdio MCP server, 7 tools.
• thirdweb - Infrastructure for AI Agents (supports x402 integrations)
• x402 dotnet library
• x402 specs - Official specification
• 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.
• x402-solana - Solana SDK for x402
• x402magic - Build payment-protected APIs in minutes with TypeScript
• x402scan - Explore and analyze x402 transactions
• x402station - Discover and monitor x402 services

x402 Developer Sandboxes & Testing

Tools and playgrounds to experiment and prototype with x402.

• x402 Cloudflare Playground - Run and test x402 flows in Cloudflare Workers
• x402 Test Page - x402 test payment

x402 Learning & Community Resources

Educational content, directories, and resource hubs.

• awesome-x402 - Curated list of x402-related projects
• BridgeNode skill - Agent skill for pay-per-request LLM inference via x402: installable skill with usage, endpoints and payment flow for AI agents.
• Firecrawl - Turn websites into LLM-ready data (useful for x402 + agentic use cases)
• x402 Ecosystem - Overview of all ecosystem participants
• x402 on Coingecko - Top x402 Ecosystem Coins by Market Cap