# Gold 402

> ⚡ The gold standard for x402 resources. 300+ projects, SDKs, tools, facilitators, and ecosystem data for the HTTP 402 Payment Required protocol. Curated by 24K Labs.

- **Type:** MCP server
- **Install:** `agentstack add mcp-haustorium12-gold-402`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [Haustorium12](https://agentstack.voostack.com/s/haustorium12)
- **Installs:** 0
- **Category:** [Finance & Payments](https://agentstack.voostack.com/c/finance-and-payments)
- **Latest version:** 0.1.0
- **License:** CC0-1.0
- **Upstream author:** [Haustorium12](https://github.com/Haustorium12)
- **Source:** https://github.com/Haustorium12/gold-402
- **Website:** https://www.x402.org/

## Install

```sh
agentstack add mcp-haustorium12-gold-402
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# gold-402

> The gold standard for x402 resources. Facilitators, SDKs, APIs, MCP servers, tools, and ecosystem data — curated by 24K Labs. No filler. No dead links. Updated monthly.

[](https://github.com/Haustorium12/gold-402)
[](https://github.com/Haustorium12/gold-402/commits/main)
[](https://x402.org/ecosystem)
[](https://24klabs.ai)
[](directory/facilitators.md)

The 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.

gold-402 doesn't. Every entry in the README earned its place. The full catalog lives in [`directory/`](directory/).

This is the editorial layer: curated picks with context and badges, backed by an exhaustive reference directory. Two layers, one repo.

---

## Featured This Month

> ★ **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)

[](FEATURED.md)

We 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.

That 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.

[Read the full report →](articles/2026-07-verification-findings.md) · [Past features →](FEATURED.md)

---

## What's New

> **July 2026** — 22,545 x402 endpoints probed. 74% are dead. Here's what's actually live.

- [**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)

---

> **June 2026** — Enterprise infrastructure arrives: Fireblocks, Arbitrum, and 169M+ transactions.

- [**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)
- [**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.
- [**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.
- [**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.
- [**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.
- [**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.

---

## Contents

- [Featured This Month](#featured-this-month)
- [What's New](#whats-new)
- [Quick Start](#quick-start)
- [How x402 Works](#how-x402-works)
- [Facilitators](#facilitators)
- [SDKs & Libraries](#sdks--libraries)
- [MCP Servers](#mcp-servers)
- [APIs & Services](#apis--services)
- [Tools & Monitoring](#tools--monitoring)
- [Security & Compliance](#security--compliance)
- [Ecosystem & Wallets](#ecosystem--wallets)
- [Learning & Community](#learning--community)
- [Market Data](#market-data)
- [Need More?](#need-more)
- [Contributing](#contributing)

---

## Quick Start

> **New to x402?** Three steps to your first payment.

**1. Pick a facilitator**

| Use case | Facilitator |
|----------|-------------|
| Most chains, full SDK support | [Coinbase CDP](https://docs.cdp.coinbase.com/x402) |
| Edge deployment, global latency | [Cloudflare x402](https://developers.cloudflare.com/workers/examples/x402) |
| Enterprise billing + disputes | [Stripe Machine Payments](https://docs.stripe.com/payments/machine/x402) |

**2. Install the SDK**

```bash
# TypeScript
npm install @coinbase/x402-express

# Python
pip install x402

# Rust
cargo add x402
```

**3. Add payment middleware**

```typescript
import { paymentMiddleware } from '@coinbase/x402-express';

app.use(paymentMiddleware(wallet, {
  '/api/data': { price: '$0.01', network: 'base-mainnet' }
}));
```

That's it. The middleware returns 402 with payment details, verifies the client's payment header, and lets the request through.

[Full quickstart →](https://docs.cdp.coinbase.com/x402/quickstart-for-sellers) · [Testnet setup →](https://docs.cdp.coinbase.com/x402/network-support)

---

## How x402 Works

```
1. Client  →  GET /api/data                              (initial request)
2. Server  ←  402 Payment Required                       (payment details in header)
               X-Payment-Required: {amount, address, network}
3. Client  →  EIP-3009 gasless USDC transfer             (client signs + submits)
4. Client  →  GET /api/data  +  X-Payment: {signed tx}  (retry with payment)
5. Facilitator  →  verify + settle on-chain              (~2 seconds)
6. Server  ←  200 OK  +  X-Payment-Response              (resource returned)
```

No gas for the sender. No subscription. No API key. Payment IS authentication.

[Protocol spec →](https://github.com/coinbase/x402) · [EIP-3009 →](https://eips.ethereum.org/EIPS/eip-3009)

---

## Facilitators

Facilitators verify payment headers and settle transactions on-chain. Production deployments require one. Choose based on chains needed and where you're deploying.

| Facilitator | Chains | Description |
|-------------|--------|-------------|
| [Coinbase CDP](https://docs.cdp.coinbase.com/x402/facilitators) [](CONTRIBUTING.md#24k-verified-tier) | Base, ETH, SOL, POL, XRPL, XLM, + | Official facilitator. Most chains, deepest SDK integration. Primary choice for production. |
| [Cloudflare x402](https://developers.cloudflare.com/workers/examples/x402) [](CONTRIBUTING.md#24k-verified-tier) | Base, ETH | Edge-native. Zero cold start, global CDN distribution. Best for latency-sensitive APIs. |
| [Stripe Machine Payments](https://docs.stripe.com/payments/machine/x402) [](CONTRIBUTING.md#24k-verified-tier) [](FEATURED.md) | Base | Enterprise billing infrastructure: dispute resolution, fraud detection, compliance tooling. |
| [Polygon x402](https://polygon.technology/payments/agentic-payments) [](CONTRIBUTING.md#24k-verified-tier) | Polygon | Now leading Base in daily transaction count. MATIC fee subsidies for agentic payments. |
| [Stellar x402](https://docs.stellar.org/x402) [](CONTRIBUTING.md#24k-verified-tier) | XLM | Fastest finality in the ecosystem. Added March 2026. |
| [AsterPay](https://asterpay.io) [](https://asterpay.io) [](https://asterpay.io) | Base, ETH | EU/MiCA-compliant facilitator for European enterprise deployments. |
| [Dexter DAO](https://github.com/Dexter-DAO/dexter-x402-sdk) [](CONTRIBUTING.md#24k-verified-tier) [](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. |
| [Ultravioleta DAO](https://facilitator.ultravioletadao.xyz) [](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. |

[Full facilitator directory →](directory/facilitators.md)

---

## SDKs & Libraries

| SDK | Language | Description |
|-----|----------|-------------|
| [x402-typescript](https://github.com/coinbase/x402/tree/main/typescript) [](CONTRIBUTING.md#24k-verified-tier) | TypeScript | Official SDK. Express, Hono, Next.js, Fastify middleware + `x402-fetch` client. The default choice. |
| [x402 Python](https://pypi.org/project/x402/) [](CONTRIBUTING.md#24k-verified-tier) | Python | Official SDK. FastAPI middleware + async requests client. |
| [x402-rs](https://github.com/x402-rs/x402-rs) [](CONTRIBUTING.md#24k-verified-tier) [](https://github.com/x402-rs/x402-rs) | Rust | Axum middleware + async runtime. Full EIP-3009 signing. |
| [ag402](https://github.com/AetherCore-Dev/ag402) [](CONTRIBUTING.md#24k-verified-tier) [](https://github.com/AetherCore-Dev/ag402) | Go/Python | Multi-language. Wrap any API with `ag402 serve`, auto-pay with `ag402 run`. Solana USDC. |
| [x402-mcp](https://vercel.com/blog/introducing-x402-mcp-open-protocol-payments-for-mcp-tools) [](CONTRIBUTING.md#24k-verified-tier) | TypeScript | Vercel AI SDK `paidTool` primitive. The cleanest path for AI SDK builders. |
| [MoltsPay](https://github.com/moltspay/molts-pay) [](https://github.com/moltspay/molts-pay) [](https://github.com/moltspay/molts-pay) | TypeScript | Multi-framework (Express, Hono, Fastify, Next.js). Base + Solana + ETH. Drop-in replacement. |
| [Mogami](https://mogami.tech) [](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. |
| [Solana Foundation Pay](https://github.com/solana-foundation/pay) [](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. |

[Full SDK directory →](directory/sdks.md) · [Framework middleware →](directory/frameworks.md)

---

## MCP Servers

x402-native Model Context Protocol servers — AI agents pay per tool call, no API keys.

| MCP Server | Category | Description |
|-----------|----------|-------------|
| [agentsvc.io MCP](https://agentsvc.io/mcp) [](CONTRIBUTING.md#24k-verified-tier) [](https://agentsvc.io) | General | 100+ curated MCP tools, x402-gated. The hub for AI agent tooling. |
| [x402-mcp](https://vercel.com/blog/introducing-x402-mcp-open-protocol-payments-for-mcp-tools) [](CONTRIBUTING.md#24k-verified-tier) | SDK | Vercel AI SDK `paidTool` primitive — for building MCP tools that monetize via x402. |
| [IteraTools MCP](https://iteratools.ai/mcp) [](CONTRIBUTING.md#24k-verified-tier) | Automation | Task automation via x402. Sequential and parallel workflow execution. |
| [EntRoute MCP](https://entroute.ai/mcp) [](CONTRIBUTING.md#24k-verified-tier) | Data/Intelligence | Data intelligence and routing. Multi-chain analytics. |
| [ShieldAPI MCP](https://www.npmjs.com/package/shieldapi-mcp) [](CONTRIBUTING.md#24k-verified-tier) [](https://github.com/alberthild/shieldapi-mcp) | Security | 9 endpoints: breach check (900M+ HIBP hashes), URL safety, prompt injection detection. |
| [MoltGuard](https://api.moltrust.ch/guard/) [](https://github.com/moltrust/moltguard) [](https://api.moltrust.ch) | Trust | Agent trust scoring (0-100), Sybil detection, Ed25519 Verifiable Credentials. 7 MCP tools. |
| [ToolOracle](https://tooloracle.ai) [](https://tooloracle.ai) | Discovery | Real-time discovery of x402-enabled tools across the ecosystem. Agents find tools, tools get paid. |
| [24K Labs Code Review MCP](https://24klabs.ai/mcp) [](CONTRIBUTING.md#24k-verified-tier) | Dev Tools | AI code review + security audit via MCP. Pay per PR. Runs in CI or interactively. |
| [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. |
| [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. |
| [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. |

[Full MCP server directory →](directory/mcp-servers.md)

---

## APIs & Services

x402-payable APIs — pay per request, no subscriptions.

| Service | Pricing | Description |
|---------|---------|-------------|
| [24K Labs Code Review API](https://24klabs.ai/code-review) [](CONTRIBUTING.md#24k-verified-tier) | $0.01-$3.00 | 6 AI code services: explain, debug, review, security audit, automation, MCP blueprint. USDC on Base. |
| [agentsvc.io](https://agentsvc.io) [](CONTRIBUTING.md#24k-verified-tier) [](https://agentsvc.io) | Per-call | 100+ AI tools via a single x402-gated endpoint. One integration, full ecosystem access. |
| [Strale](https://strale.ai) [](CONTRIBUTING.md#24k-verified-tier) | Per-token | LLM inference via x402. Pay per token, no subscription, no API key. |
| [AIsa](https://aisa.ai) [](CONTRIBUTING.md#24k-verified-tier) | Per-call | AI + crypto data fusion. Highest x402 transaction count of any API service in the ecosystem. |
| [QuickNode RPC](https://quicknode.com) [](CONTRIBUTING.md#24k-verified-tier) [](https://quicknode.com) | Per-request | Pay-per-request RPC access to 130+ chains. No node management. |
| [Arch Tools](https://archtools.io) [](CONTRIBUTING.md#24k-verified-tier) | Per-call | 27 on-chain tools. Portfolio analysis, NFT data, market intelligence on Base. |
| [ShieldAPI](https://shield.vainplex.dev) [](CONTRIBUTING.md#24k-verified-tier) [](https://github.com/alberthild/shieldapi-mcp) | $0.002–$0.05 | Security intelligence: breach check, domain reputation, URL safety, prompt injection detection. |
| [Valoria](https://x402.valoria.net) | — | Market intelligence: 90K+ indexed services, $148M+ tracked on-chain volume, revenue rankings. |
| [Firecrawl x402](https://api.firecrawl.dev/v1/x402/search) [](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. |
| [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. |
| [Vindex](https://api.vindexapi.dev) | $0.01 | Vehicle-data API: VIN decode with factory warranty terms, recalls, known-issues/reliability, and US & Canada purchase-cost estimates. NHTSA and Transport Canada sources. USDC on Base. |
| [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. |
| [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. |

[Full API directory →](directory/apis.md)

---

## Tools & Monitoring

| Tool | Description |
|------|-------------|
| [x402-proxy](https://www.npmjs.com/packag

…

## Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [Haustorium12](https://github.com/Haustorium12)
- **Source:** [Haustorium12/gold-402](https://github.com/Haustorium12/gold-402)
- **License:** CC0-1.0
- **Homepage:** https://www.x402.org/

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** yes
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/mcp-haustorium12-gold-402
- Seller: https://agentstack.voostack.com/s/haustorium12
- Browse the marketplace: https://agentstack.voostack.com/browse

---
Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.