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Facilitators, SDKs, APIs, MCP servers, tools, and ecosystem data — curated by 24K Labs. No filler. No dead links. Updated monthly.\n\n[![GitHub stars](https://img.shields.io/github/stars/Haustorium12/gold-402?style=social)](https://github.com/Haustorium12/gold-402)\n[![Last Commit](https://img.shields.io/github/last-commit/Haustorium12/gold-402)](https://github.com/Haustorium12/gold-402/commits/main)\n[![x402 Projects](https://img.shields.io/badge/x402_projects-300%2B-D4AF37)](https://x402.org/ecosystem)\n[![Curated by 24K Labs](https://img.shields.io/badge/Curated_by-24K_Labs-gold)](https://24klabs.ai)\n[![Chains](https://img.shields.io/badge/Chains-8%2B-blue)](directory/facilitators.md)\n\nThe x402 ecosystem passed 50M transactions in March 2026. 300+ projects across 8 chains. 10,000%+ year-over-year growth. The community awesome-list accepts everything — that's its job.\n\ngold-402 doesn't. Every entry in the README earned its place. The full catalog lives in [`directory/`](directory/).\n\nThis is the editorial layer: curated picks with context and badges, backed by an exhaustive reference directory. Two layers, one repo.\n\n---\n\n## Featured This Month\n\n\u003e ★ **July 2026** — [**24K Labs Verification Report: Three-Quarters of the x402 Bazaar Is Dead**](articles/2026-07-verification-findings.md) by [24K Labs](https://24klabs.ai)\n\n[![24K Featured](https://img.shields.io/badge/24K_Featured-2026--07-C0C0C0?style=plastic)](FEATURED.md)\n\nWe probed all 22,545 x402 services in the CDP Bazaar. 5,792 returned a valid 402 Payment Required response. The other 16,753 were gone, misconfigured, or unreachable — a 74% dead rate.\n\nThat number is the whole argument for a verified catalog. The Bazaar reflects everything ever listed; it cannot tell you what is running right now. This report can: the headline finding, a reproducible methodology, and the verified services framed as \"the ones that actually work\" — including real payer counts that no listing can fake. It is the most direct statement of what gold-402 is for.\n\n[Read the full report →](articles/2026-07-verification-findings.md) · [Past features →](FEATURED.md)\n\n---\n\n## What's New\n\n\u003e **July 2026** — 22,545 x402 endpoints probed. 74% are dead. Here's what's actually live.\n\n- [**24K Labs Verification Report**](articles/2026-07-verification-findings.md) — We probed every x402 service in the CDP Bazaar. 5,792 verified live (25.7%). 16,686 failed (74%). The verified catalog is what makes the Bazaar usable. [→ Full report](articles/2026-07-verification-findings.md)\n\n---\n\n\u003e **June 2026** — Enterprise infrastructure arrives: Fireblocks, Arbitrum, and 169M+ transactions.\n\n- [**Fireblocks Agentic Payments Suite**](https://www.fireblocks.com/products/agentic-payments) — Full-lifecycle agentic payment infrastructure from the $14T digital asset custody platform. MPC agentic wallets with delegation rules, merchant Gateway for stablecoin acceptance, and a security extension to the x402 spec (request integrity + spend governance). Joined the x402 Foundation May 20, 2026. [★ June Featured Pick →](articles/2026-06-fireblocks-agentic-payments.md)\n- [**x402 live on Arbitrum**](https://blog.arbitrum.foundation/x402-payments-on-arbitrum/) — Arbitrum confirmed x402 deployment on May 15. x402 now runs natively on Base, Ethereum, Arbitrum, Polygon, and Solana. EVM coverage is effectively complete.\n- [**169M+ transactions, 590k+ buyers, 100k+ sellers**](https://www.coinbase.com/blog/introducing-amazon-bedrock-agentcore-payments-powered-by-x402-and-coinbase) — Updated ecosystem stats from Coinbase's AWS Bedrock launch post. Grew from 50M to 169M transactions in roughly six weeks post-Foundation launch.\n- [**AWS Bedrock AgentCore Payments — now production**](https://www.coinbase.com/blog/introducing-amazon-bedrock-agentcore-payments-powered-by-x402-and-coinbase) — AWS-managed x402 wallet and payment infrastructure natively integrated into Amazon Bedrock agent workflows. Moved from preview to production.\n- [**LayerZero joins x402 Foundation**](https://x402.org/ecosystem) — Cross-chain infrastructure added to the Foundation roster. Enables x402 payments to bridge across chains without manual routing at the application layer.\n- [**Quant Network joins x402 Foundation**](https://x402.org/ecosystem) — Interoperability and programmable-money infrastructure joins Foundation governance. Expands the enterprise interoperability story for regulated deployments.\n\n---\n\n## Contents\n\n- [Featured This Month](#featured-this-month)\n- [What's New](#whats-new)\n- [Quick Start](#quick-start)\n- [How x402 Works](#how-x402-works)\n- [Facilitators](#facilitators)\n- [SDKs \u0026 Libraries](#sdks--libraries)\n- [MCP Servers](#mcp-servers)\n- [APIs \u0026 Services](#apis--services)\n- [Tools \u0026 Monitoring](#tools--monitoring)\n- [Security \u0026 Compliance](#security--compliance)\n- [Ecosystem \u0026 Wallets](#ecosystem--wallets)\n- [Learning \u0026 Community](#learning--community)\n- [Market Data](#market-data)\n- [Need More?](#need-more)\n- [Contributing](#contributing)\n\n---\n\n## Quick Start\n\n\u003e **New to x402?** Three steps to your first payment.\n\n**1. Pick a facilitator**\n\n| Use case | Facilitator |\n|----------|-------------|\n| Most chains, full SDK support | [Coinbase CDP](https://docs.cdp.coinbase.com/x402) |\n| Edge deployment, global latency | [Cloudflare x402](https://developers.cloudflare.com/workers/examples/x402) |\n| Enterprise billing + disputes | [Stripe Machine Payments](https://docs.stripe.com/payments/machine/x402) |\n\n**2. Install the SDK**\n\n```bash\n# TypeScript\nnpm install @coinbase/x402-express\n\n# Python\npip install x402\n\n# Rust\ncargo add x402\n```\n\n**3. Add payment middleware**\n\n```typescript\nimport { paymentMiddleware } from '@coinbase/x402-express';\n\napp.use(paymentMiddleware(wallet, {\n  '/api/data': { price: '$0.01', network: 'base-mainnet' }\n}));\n```\n\nThat's it. The middleware returns 402 with payment details, verifies the client's payment header, and lets the request through.\n\n[Full quickstart →](https://docs.cdp.coinbase.com/x402/quickstart-for-sellers) · [Testnet setup →](https://docs.cdp.coinbase.com/x402/network-support)\n\n---\n\n## How x402 Works\n\n```\n1. Client  →  GET /api/data                              (initial request)\n2. Server  ←  402 Payment Required                       (payment details in header)\n               X-Payment-Required: {amount, address, network}\n3. Client  →  EIP-3009 gasless USDC transfer             (client signs + submits)\n4. Client  →  GET /api/data  +  X-Payment: {signed tx}  (retry with payment)\n5. Facilitator  →  verify + settle on-chain              (~2 seconds)\n6. Server  ←  200 OK  +  X-Payment-Response              (resource returned)\n```\n\nNo gas for the sender. No subscription. No API key. Payment IS authentication.\n\n[Protocol spec →](https://github.com/coinbase/x402) · [EIP-3009 →](https://eips.ethereum.org/EIPS/eip-3009)\n\n---\n\n## Facilitators\n\nFacilitators verify payment headers and settle transactions on-chain. Production deployments require one. Choose based on chains needed and where you're deploying.\n\n| Facilitator | Chains | Description |\n|-------------|--------|-------------|\n| [Coinbase CDP](https://docs.cdp.coinbase.com/x402/facilitators) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) | Base, ETH, SOL, POL, XRPL, XLM, + | Official facilitator. Most chains, deepest SDK integration. Primary choice for production. |\n| [Cloudflare x402](https://developers.cloudflare.com/workers/examples/x402) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) | Base, ETH | Edge-native. Zero cold start, global CDN distribution. Best for latency-sensitive APIs. |\n| [Stripe Machine Payments](https://docs.stripe.com/payments/machine/x402) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) [![24K Featured](https://img.shields.io/badge/24K_Featured-2026--04-C0C0C0?style=plastic)](FEATURED.md) | Base | Enterprise billing infrastructure: dispute resolution, fraud detection, compliance tooling. |\n| [Polygon x402](https://polygon.technology/payments/agentic-payments) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) | Polygon | Now leading Base in daily transaction count. MATIC fee subsidies for agentic payments. |\n| [Stellar x402](https://docs.stellar.org/x402) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) | XLM | Fastest finality in the ecosystem. Added March 2026. |\n| [AsterPay](https://asterpay.io) [![MiCA](https://img.shields.io/badge/MiCA-aware-0550AE?style=plastic)](https://asterpay.io) [![ERC-8004](https://img.shields.io/badge/ERC--8004-registered-E36209?style=plastic)](https://asterpay.io) | Base, ETH | EU/MiCA-compliant facilitator for European enterprise deployments. |\n| [Dexter DAO](https://github.com/Dexter-DAO/dexter-x402-sdk) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--05-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) [![Open Source](https://img.shields.io/badge/Open_Source-2EA44F?style=plastic)](https://github.com/Dexter-DAO/dexter-x402-sdk) | Base, ETH, SOL, + | Largest x402 facilitator by volume. Handles ~50% of daily transactions. Chain-agnostic v2 SDK with client, server, React hooks, and Express middleware. |\n| [Ultravioleta DAO](https://facilitator.ultravioletadao.xyz) [![Multi-Chain](https://img.shields.io/badge/Multi--Chain-33+-0366D6?style=plastic)](https://facilitator.ultravioletadao.xyz) | EVM, SOL, NEAR, XLM, ALGO, SUI, + | Broadest multi-chain coverage in the ecosystem. 33+ networks including non-EVM chains. REST API with chain-specific settlement routing. |\n\n[Full facilitator directory →](directory/facilitators.md)\n\n---\n\n## SDKs \u0026 Libraries\n\n| SDK | Language | Description |\n|-----|----------|-------------|\n| [x402-typescript](https://github.com/coinbase/x402/tree/main/typescript) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) | TypeScript | Official SDK. Express, Hono, Next.js, Fastify middleware + `x402-fetch` client. The default choice. |\n| [x402 Python](https://pypi.org/project/x402/) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) | Python | Official SDK. FastAPI middleware + async requests client. |\n| [x402-rs](https://github.com/x402-rs/x402-rs) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) [![Open Source](https://img.shields.io/badge/Open_Source-2EA44F?style=plastic)](https://github.com/x402-rs/x402-rs) | Rust | Axum middleware + async runtime. Full EIP-3009 signing. |\n| [ag402](https://github.com/AetherCore-Dev/ag402) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) [![Open Source](https://img.shields.io/badge/Open_Source-2EA44F?style=plastic)](https://github.com/AetherCore-Dev/ag402) | Go/Python | Multi-language. Wrap any API with `ag402 serve`, auto-pay with `ag402 run`. Solana USDC. |\n| [x402-mcp](https://vercel.com/blog/introducing-x402-mcp-open-protocol-payments-for-mcp-tools) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) | TypeScript | Vercel AI SDK `paidTool` primitive. The cleanest path for AI SDK builders. |\n| [MoltsPay](https://github.com/moltspay/molts-pay) [![Open Source](https://img.shields.io/badge/Open_Source-2EA44F?style=plastic)](https://github.com/moltspay/molts-pay) [![Multi-Chain](https://img.shields.io/badge/Multi--Chain-7+-0366D6?style=plastic)](https://github.com/moltspay/molts-pay) | TypeScript | Multi-framework (Express, Hono, Fastify, Next.js). Base + Solana + ETH. Drop-in replacement. |\n| [Mogami](https://mogami.tech) [![Open Source](https://img.shields.io/badge/Open_Source-2EA44F?style=plastic)](https://github.com/mogami-tech/x402-mcp-server) | Java | Production-ready Java x402 stack with SDK, server, console, and bundled MCP server. Fills the Java gap in the official ecosystem. |\n| [Solana Foundation Pay](https://github.com/solana-foundation/pay) [![Open Source](https://img.shields.io/badge/Open_Source-2EA44F?style=plastic)](https://github.com/solana-foundation/pay) | TypeScript | Official Solana Foundation library for handling x402 and MPP payment challenges with user-authorized stablecoin signing. Updated May 2026. |\n\n[Full SDK directory →](directory/sdks.md) · [Framework middleware →](directory/frameworks.md)\n\n---\n\n## MCP Servers\n\nx402-native Model Context Protocol servers — AI agents pay per tool call, no API keys.\n\n| MCP Server | Category | Description |\n|-----------|----------|-------------|\n| [agentsvc.io MCP](https://agentsvc.io/mcp) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) [![A2A Ready](https://img.shields.io/badge/A2A-ready-8250DF?style=plastic)](https://agentsvc.io) | General | 100+ curated MCP tools, x402-gated. The hub for AI agent tooling. |\n| [x402-mcp](https://vercel.com/blog/introducing-x402-mcp-open-protocol-payments-for-mcp-tools) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) | SDK | Vercel AI SDK `paidTool` primitive — for building MCP tools that monetize via x402. |\n| [IteraTools MCP](https://iteratools.ai/mcp) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) | Automation | Task automation via x402. Sequential and parallel workflow execution. |\n| [EntRoute MCP](https://entroute.ai/mcp) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) | Data/Intelligence | Data intelligence and routing. Multi-chain analytics. |\n| [ShieldAPI MCP](https://www.npmjs.com/package/shieldapi-mcp) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) [![Open Source](https://img.shields.io/badge/Open_Source-2EA44F?style=plastic)](https://github.com/alberthild/shieldapi-mcp) | Security | 9 endpoints: breach check (900M+ HIBP hashes), URL safety, prompt injection detection. |\n| [MoltGuard](https://api.moltrust.ch/guard/) [![Open Source](https://img.shields.io/badge/Open_Source-2EA44F?style=plastic)](https://github.com/moltrust/moltguard) [![ERC-8004](https://img.shields.io/badge/ERC--8004-registered-E36209?style=plastic)](https://api.moltrust.ch) | Trust | Agent trust scoring (0-100), Sybil detection, Ed25519 Verifiable Credentials. 7 MCP tools. |\n| [ToolOracle](https://tooloracle.ai) [![A2A Ready](https://img.shields.io/badge/A2A-ready-8250DF?style=plastic)](https://tooloracle.ai) | Discovery | Real-time discovery of x402-enabled tools across the ecosystem. Agents find tools, tools get paid. |\n| [24K Labs Code Review MCP](https://24klabs.ai/mcp) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) | Dev Tools | AI code review + security audit via MCP. Pay per PR. Runs in CI or interactively. |\n| [vindex-mcp](https://www.npmjs.com/package/vindex-mcp) | Data/Intelligence | Vehicle data over x402: VIN decode with warranty terms, recalls, reliability, and US/Canada purchase-cost estimates. USDC on Base. |\n| [isocast-mcp](https://www.npmjs.com/package/isocast-mcp) | Data/Intelligence | Per-signal Polymarket weather-market data across 37 cities, with market URLs and live bucket odds. USDC on Base. |\n| [moltalyzer-mcp](https://www.npmjs.com/package/moltalyzer-mcp) | Data/Intelligence | Polymarket and AI-agent-community intelligence: order-book movers, whale calibration, and multi-source digests. USDC on Base. |\n\n[Full MCP server directory →](directory/mcp-servers.md)\n\n---\n\n## APIs \u0026 Services\n\nx402-payable APIs — pay per request, no subscriptions.\n\n| Service | Pricing | Description |\n|---------|---------|-------------|\n| [24K Labs Code Review API](https://24klabs.ai/code-review) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) | $0.01-$3.00 | 6 AI code services: explain, debug, review, security audit, automation, MCP blueprint. USDC on Base. |\n| [agentsvc.io](https://agentsvc.io) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) [![A2A Ready](https://img.shields.io/badge/A2A-ready-8250DF?style=plastic)](https://agentsvc.io) | Per-call | 100+ AI tools via a single x402-gated endpoint. One integration, full ecosystem access. |\n| [Strale](https://strale.ai) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) | Per-token | LLM inference via x402. Pay per token, no subscription, no API key. |\n| [AIsa](https://aisa.ai) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) | Per-call | AI + crypto data fusion. Highest x402 transaction count of any API service in the ecosystem. |\n| [QuickNode RPC](https://quicknode.com) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) [![Multi-Chain](https://img.shields.io/badge/Multi--Chain-130+-0366D6?style=plastic)](https://quicknode.com) | Per-request | Pay-per-request RPC access to 130+ chains. No node management. |\n| [Arch Tools](https://archtools.io) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) | Per-call | 27 on-chain tools. Portfolio analysis, NFT data, market intelligence on Base. |\n| [ShieldAPI](https://shield.vainplex.dev) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) [![Open Source](https://img.shields.io/badge/Open_Source-2EA44F?style=plastic)](https://github.com/alberthild/shieldapi-mcp) | $0.002–$0.05 | Security intelligence: breach check, domain reputation, URL safety, prompt injection detection. |\n| [Valoria](https://x402.valoria.net) | — | Market intelligence: 90K+ indexed services, $148M+ tracked on-chain volume, revenue rankings. |\n| [Firecrawl x402](https://api.firecrawl.dev/v1/x402/search) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--05-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) | Per-request | Web scraping and search API with x402-gated endpoints and automatic on-chain USDC settlement. Coinbase CDP case study service. |\n| [JMT x402 Agent Tools](https://jmt-x402-proxy.jmthomasofficial.workers.dev) | $0.001-$0.15 | 25 endpoints: web search, AI analysis, crypto/stock data, SEC filings, company intel, news, sentiment, macro dashboard. USDC on Base. Local LLM-powered. |\n| [Vindex](https://api.vindexapi.dev) | $0.01 | Vehicle-data API: VIN decode with factory warranty terms, recalls, known-issues/reliability, and US \u0026 Canada purchase-cost estimates. NHTSA and Transport Canada sources. USDC on Base. |\n| [Isocast](https://api.isocast.dev) | From $0.01 | Per-signal Polymarket weather-market data across 37 cities. Fires when a city's daily-high temperature crosses into a new Polymarket bucket, returning the market URL and live bucket odds. USDC on Base. |\n| [Moltalyzer](https://api.moltalyzer.xyz) | $0.01–$0.05 | Polymarket and AI-agent-community intelligence: order-book microstructure movers, whale hold-to-resolution calibration, and multi-source digests. USDC on Base. |\n\n[Full API directory →](directory/apis.md)\n\n---\n\n## Tools \u0026 Monitoring\n\n| Tool | Description |\n|------|-------------|\n| [x402-proxy](https://www.npmjs.com/package/x402-proxy) [![Open Source](https://img.shields.io/badge/Open_Source-2EA44F?style=plastic)](https://github.com/cascade-protocol/x402-proxy) | `npx x402-proxy` — cURL for x402 APIs. Auto-pays 402 with USDC on Base and Solana. MCP stdio proxy. |\n| [Paybound](https://github.com/pando-b/paybound) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) [![Open Source](https://img.shields.io/badge/Open_Source-2EA44F?style=plastic)](https://github.com/pando-b/paybound) | Open-source governance proxy. Per-agent budgets, circuit breakers, SQLite audit trail. Drop-in `@x402/fetch` replacement. |\n| [Sentinel/Valeo](https://sentinel.valeocash.com) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) | Enterprise audit layer. Budget enforcement, structured trails, real-time dashboard, public payment explorer. |\n| [ScoutScore](https://scoutscore.ai) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) | Trust scoring for x402 services. Monitors 1,700+ services with continuous health checks. |\n| [x402scan](https://x402scan.com) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) | Block explorer for x402 payments. Transaction search, payment requirement inspection, settlement status. |\n| [24K Labs GitHub Action](https://github.com/Haustorium12/24klabs-action) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) [![Open Source](https://img.shields.io/badge/Open_Source-2EA44F?style=plastic)](https://github.com/Haustorium12/24klabs-action) | AI code review + security audit on every PR via x402 micropayments. Drop into any GitHub Actions workflow. |\n| [Agent Forensics](https://www.npmjs.com/package/agent-forensics) | Claude Code cost observability. Analyzes JSONL session logs: per-model cost breakdown, cache efficiency, waste patterns. Free CLI. |\n| [x402station](https://x402station.com) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--05-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) | Real-time monitoring and discovery for 20,000+ x402 endpoints. Continuous health probes every 10 minutes. MCP server for agent access included. |\n| [AWS CloudFront x402 sample](https://github.com/aws-samples/sample-x402-content-monetization-with-cloudfront-and-waf) [![Open Source](https://img.shields.io/badge/Open_Source-2EA44F?style=plastic)](https://github.com/aws-samples/sample-x402-content-monetization-with-cloudfront-and-waf) | AWS-published reference implementation for monetizing content behind CloudFront and WAF with x402 and USDC payments. |\n| [LemonCake](https://lemoncake.xyz) [![Open Source](https://img.shields.io/badge/Open_Source-2EA44F?style=plastic)](https://github.com/evidai/agent-payment-mcp) | x402 gateway + agent funding rail. 402 challenge returns `accepts[]` with `buyUrl` (human) and `mintUrl` (machine). Off-session top-ups via Buyer Key (hard-capped per-mint/daily/monthly). Stripe Connect Direct Charge — custody-free. MCP server on npm. |\n| [Agent Café](https://api.402.coffee/docs) | The trust layer for agent payments on Base. One live x402 endpoint, three services in real USDC: **certify** a paying agent (public certificate + badge that it pays correctly, refuses over-priced scams, and checks the recipient), **score** any wallet's payment risk 0–100 before you transact (`POST /score`; free `GET /verify`), and **escrow** x402 sales with automated on-chain arbitration. Every result is a fact observed on-chain. |\n\n[Full tools directory →](directory/tools.md)\n\n---\n\n## Security \u0026 Compliance\n\n| Service | Description |\n|---------|-------------|\n| [ShieldAPI](https://shield.vainplex.dev) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) [![Open Source](https://img.shields.io/badge/Open_Source-2EA44F?style=plastic)](https://github.com/alberthild/shieldapi-mcp) | x402-native security API. Breach check (900M+ HIBP hashes), domain/IP reputation, prompt injection detection. |\n| [KaelAi](https://kaelai.io) | Wallet trust scoring 0-100 across 10 chains. Vet incoming/outgoing payment wallets before serving requests. |\n| [MoltGuard](https://api.moltrust.ch/guard/) [![Open Source](https://img.shields.io/badge/Open_Source-2EA44F?style=plastic)](https://github.com/moltrust/moltguard) [![ERC-8004](https://img.shields.io/badge/ERC--8004-registered-E36209?style=plastic)](https://api.moltrust.ch) | Agent trust scoring, Sybil detection with funding cluster analysis, Ed25519 Verifiable Credentials. |\n| [Paybound](https://github.com/pando-b/paybound) [![Open Source](https://img.shields.io/badge/Open_Source-2EA44F?style=plastic)](https://github.com/pando-b/paybound) | Governance proxy with circuit breakers and per-agent spending limits. MIT licensed. |\n| [SENTINEL](https://mru-oracle.com) [![Open Source](https://img.shields.io/badge/Open_Source-2EA44F?style=plastic)](https://github.com/INJprotocol/mauritius-oracle-) | AML/CFT compliance. 77K+ sanctions entities (OFAC, UN, EU, PEP, Interpol), 159-country jurisdiction risk scoring. |\n| [PolicyLayer](https://policylayer.com) [![A2A Ready](https://img.shields.io/badge/A2A-ready-8250DF?style=plastic)](https://policylayer.com) | Non-custodial spending controls. Daily limits, per-transaction caps, recipient whitelists — no private key custody. |\n\n[Full security directory →](directory/security.md)\n\n---\n\n## Ecosystem \u0026 Wallets\n\n| Project | Description |\n|---------|-------------|\n| [Coinbase Agentic Wallets](https://docs.cdp.coinbase.com/agentic-wallets) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) | Native CDP wallets purpose-built for AI agents. Launched April 2, 2026. The reference implementation. |\n| [Cloudflare Agents SDK](https://developers.cloudflare.com/agents) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) | Edge-native agent deployment with x402 built in. v0.4.0 adds x402 v2 migration (March 2026). |\n| [Agent.market](https://agent.market) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) | Official app store for AI agents. x402-powered transactions. Launched April 20, 2026. |\n| [WorkProtocol](https://workprotocol.ai) | Structured work marketplace for agents and builders. Escrow-backed jobs, on-chain reputation. |\n| [Nevermined + Visa](https://pinionnewswire.com/press-release/nevermineds-visa-intelligent-commerce-x402-integration-unlocks-agentic-commerce/) | AI agents get delegated credit card spending authority via Visa Intelligent Commerce + x402 (April 2026). |\n| [World AgentKit](https://www.coindesk.com/tech/2026/03/17/sam-altman-s-world-teams-up-with-coinbase-to-prove-there-is-a-real-person-behind-every-ai-transaction) | WorldID biometric identity + x402. Prove a verified human is behind every agent transaction. 18M+ verified humans. |\n\n[Full ecosystem directory →](directory/ecosystem.md)\n\n---\n\n## Learning \u0026 Community\n\n### Get Started\n\n- [5-Minute Quickstart](https://docs.cdp.coinbase.com/x402/quickstart-for-sellers) [![24K Verified](https://img.shields.io/badge/24K_Verified-2026--04-D4AF37?style=plastic)](CONTRIBUTING.md#24k-verified-tier) — Accept your first x402 payment.\n- [x402 Protocol Spec](https://github.com/coinbase/x402) — Official open-source protocol by Coinbase.\n- [Coinbase Developer Platform Docs](https://docs.cdp.coinbase.com/x402) — Complete implementation guide and API reference.\n- [LearnAI x402 Course](https://www.uselearnai.com/course/x402-protocol) — Free, interactive, AI-guided. Covers the full payment flow, facilitator setup, and agent-to-agent payments.\n\n### Essential Reading\n\n- [24K Labs: x402 Explained](https://24klabs.ai/blog/x402-explained) — History and technical breakdown of HTTP 402.\n- [AWS: x402 and Agentic Commerce](https://aws.amazon.com/blogs/industries/x402-and-agentic-commerce-redefining-autonomous-payments-in-financial-services/) — Full x402 stack with AgentCore + CloudFront + Lambda@Edge.\n- [WorkOS: x402 vs Stripe MPP](https://workos.com/blog/x402-vs-stripe-mpp-how-to-choose-payment-infrastructure-for-ai-agents-and-mcp-tools-in-2026) — How to choose in 2026.\n- [CoinDesk: Demand Still Unproven](https://www.coindesk.com/markets/2026/03/11/coinbase-backed-ai-payments-protocol-wants-to-fix-micropayment-but-demand-is-just-not-there-yet) — Honest March 2026 assessment. Worth reading.\n\n### Community\n\n- [x402 Foundation Discord](https://discord.gg/x402) — Official community. Protocol questions and announcements.\n- [x402 Builders Telegram](https://t.me/x402builders) — Active developer chat.\n- [GitHub Issues — coinbase/x402](https://github.com/coinbase/x402/issues) — Technical Q\u0026A and bug reports.\n- [Agent Economy Digest](https://agenteconomy.substack.com) — Weekly newsletter covering x402, MPP, A2A, and agentic commerce.\n\n[Full learning directory →](directory/learning.md) · [Full community directory →](directory/community.md)\n\n---\n\n## Market Data\n\n\u003e April 2026 snapshot.\n\n| Metric | Value |\n|--------|-------|\n| Cumulative Transactions | 50M+ |\n| Annualized Volume | ~$600M |\n| Ecosystem Market Cap | $815M |\n| Total Projects | 300+ |\n| Supported Chains | 8+ |\n| Transaction Growth (YoY) | 10,000%+ |\n| Foundation Members | 22+ |\n| Settlement Speed | 2 seconds avg |\n\n**Chain leaders:** Solana commanded up to 88% of transaction count by volume. Polygon now leads Base in daily transaction count. Base leads in cumulative value transferred (~$21.5M).\n\n[Full market data →](directory/market-data.md) · [Live dashboard →](https://agenteconomy.to) · [On-chain analytics →](https://dune.com/x402)\n\n---\n\n## Need More?\n\nThe README is the curated magazine — handpicked entries with context and tags. The [`directory/`](directory/) folder is the exhaustive reference, with everything we know about across the x402 ecosystem.\n\n- [Facilitators](directory/facilitators.md) — all hosted and self-hosted facilitators, hosted and self-hosted coverage tables.\n- [SDKs \u0026 Libraries](directory/sdks.md) — all SDKs by language: TypeScript, Python, Rust, Go, and more.\n- [Frameworks \u0026 Middleware](directory/frameworks.md) — server middleware for Express, Hono, Next.js, FastAPI, Axum, and Cloudflare Workers.\n- [MCP Servers](directory/mcp-servers.md) — the full MCP ecosystem, organized by category.\n- [APIs \u0026 Services](directory/apis.md) — all x402-payable API services: AI, data, infrastructure, and production deployments.\n- [Tools \u0026 Utilities](directory/tools.md) — CLI tools, monitoring, analytics, spending controls, testing, and discovery.\n- [Security \u0026 Compliance](directory/security.md) — audits, security tools, spending controls, trust scoring, and compliance.\n- [Ecosystem \u0026 Wallets](directory/ecosystem.md) — agent wallets, frameworks, marketplaces, and infrastructure.\n- [Learning Resources](directory/learning.md) — quickstarts, tutorials, articles, news, and migration guides.\n- [Community](directory/community.md) — channels, newsletters, jobs, and events.\n- [Market Data](directory/market-data.md) — on-chain analytics, dashboards, enterprise adoption, and growth timeline.\n\n---\n\n## Contributing\n\ngold-402 is curated, not exhaustive. Every entry earns its place.\n\nSee [CONTRIBUTING.md](CONTRIBUTING.md) for the curation standard, badge system, acceptance criteria, and submission process.\n\n**Quick rules:**\n- Entry must use the x402 protocol (HTTP 402 + X-Payment), not just USDC or general crypto payments.\n- Live URL or public GitHub repo. Link must work.\n- Last activity within 12 months, or carries a `24K Verified` tag.\n- One entry per pull request. Format: `[Name](url) — Description starting uppercase, ending with period.`\n- Descriptions are factual. No marketing language.\n\n---\n\n\u003cp align=\"center\"\u003e\n  \u003cb\u003eCurated by \u003ca href=\"https://24klabs.ai\"\u003e24K Labs\u003c/a\u003e\u003c/b\u003e\u003cbr\u003e\n  \u003csub\u003eIf this saved you time, star the repo.\u003c/sub\u003e\u003cbr\u003e\u003cbr\u003e\n  \u003ca href=\"https://x402.org\"\u003ex402.org\u003c/a\u003e •\n  \u003ca href=\"https://github.com/coinbase/x402\"\u003eProtocol Spec\u003c/a\u003e •\n  \u003ca href=\"https://docs.cdp.coinbase.com/x402\"\u003eCoinbase Docs\u003c/a\u003e •\n  \u003ca href=\"https://discord.gg/x402\"\u003eDiscord\u003c/a\u003e •\n  \u003ca href=\"https://agenteconomy.to\"\u003eLive Dashboard\u003c/a\u003e\n\u003c/p\u003e\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2FHaustorium12%2Fgold-402","html_url":"https://awesome.ecosyste.ms/projects/github.com%2FHaustorium12%2Fgold-402","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2FHaustorium12%2Fgold-402/lists"}