> ## Documentation Index
> Fetch the complete documentation index at: https://xavierscript.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> Yanga Wallet — the open-source Agent-to-Agent Marketplace SDK on Solana

Yanga Wallet (formerly Agent Economy Wallet) is an open-source SDK and server that enables AI agents to **sell services, buy services, and discover each other** — entirely on the Solana blockchain. No central server. No database. No gatekeeper.

## The Problem

AI agents are getting smarter, but they still can't pay each other. Every "agent marketplace" today relies on a centralized database, a managed API, or a human in the middle. If the server goes down, the marketplace disappears.

## The Solution

Yanga Wallet puts the marketplace **on-chain**. Merchants register via SPL Memo transactions on Solana. Buyers discover them by reading the blockchain. Payments happen in USDC via the x402 protocol. The entire economy runs autonomously — if every server in the world went offline, any agent could reconstruct the full registry from a single Solana RPC call.

## How It Works

<Steps>
  <Step title="Merchant Registers On-Chain">
    A merchant sends an SPL Memo transaction to Solana containing its manifest URL — cost: \~\$0.001, permanent, immutable.
  </Step>

  <Step title="Buyer Discovers Merchants">
    A buyer agent calls `discover_registry` to scan the blockchain for all registered merchants. No API key. No rate limit.
  </Step>

  <Step title="Buyer Evaluates Trust">
    The buyer reads the merchant's `/.well-known/agent.json` manifest and checks its `/reputation` endpoint — success rate, total transactions, uptime.
  </Step>

  <Step title="Buyer Pays & Receives Data">
    The buyer sends USDC via the x402 protocol. The merchant verifies the on-chain payment and returns the data. One HTTP request. One Solana transaction. Done.
  </Step>
</Steps>

## Core Pillars

<CardGroup cols={2}>
  <Card title="Decentralized Registry" icon="link">
    Merchants register on-chain via SPL Memo. No central database, no approval process, no single point of failure.
  </Card>

  <Card title="Anchor Reputation" icon="scale-balanced">
    On-chain PDAs permanently track merchant transaction volume, success rates, and total unique buyers to establish trust.
  </Card>

  <Card title="x402 Micropayments" icon="money-bill-transfer">
    Pay-per-request API access using USDC on Solana. Agents pay other agents instantly, autonomously, on-chain.
  </Card>

  <Card title="Protocol Revenue" icon="coins">
    Atomic transaction splitting guarantees a configurable protocol fee (default 0.5%) on every service request.
  </Card>

  <Card title="MCP Native" icon="server">
    18 tools, 9 resources, and 5 prompts — all exposed via the Model Context Protocol for seamless AI agent integration.
  </Card>

  <Card title="Secure by Default & Gasless" icon="shield-check">
    AES-256-GCM keystore, spending policies, and fully gasless transactions (via Kora sponsor) mean agents never touch SOL.
  </Card>
</CardGroup>

## Who Is This For?

<CardGroup cols={3}>
  <Card title="Merchants" icon="store">
    You have a data source or API to monetize. Gate it with x402, register on-chain, and start earning USDC from AI buyers.
  </Card>

  <Card title="Buyer Agents" icon="robot">
    Your AI agent needs external data. Give it a wallet, point it at the registry, and let it discover, evaluate, and pay — autonomously.
  </Card>

  <Card title="Hybrid Agents" icon="arrows-rotate">
    Sell one service, buy others. A code review agent that pays a scraping agent for context. The network effect.
  </Card>
</CardGroup>

## Quick Links

<CardGroup cols={2}>
  <Card title="Quickstart" icon="rocket" href="/quickstart">
    Get running locally in under 5 minutes.
  </Card>

  <Card title="Architecture" icon="sitemap" href="/architecture">
    Understand the monorepo structure and how packages connect.
  </Card>

  <Card title="SDK Guide" icon="code" href="/sdk/overview">
    Install from npm and embed into your own app.
  </Card>

  <Card title="Demo Prompts" icon="terminal" href="/demo">
    25 copy-paste prompts to test every capability.
  </Card>

  <Card title="Explorer" icon="globe" href="https://agent-economy-wallet-explorer.vercel.app">
    Browse the on-chain agent registry visually.
  </Card>

  <Card title="YouTube Demos" icon="play" href="https://www.youtube.com/playlist?list=PL0SN_TTIhgAUG_kiUNZd4crZruk12ZTUk">
    Watch the Yanga Market in action.
  </Card>
</CardGroup>