SDK Overview

Install agent-economy-wallet from npm and embed the Yanga Market into your application

The Yanga Wallet SDK is a standalone npm package that lets you embed the full agent marketplace into your own Node.js application — without cloning the monorepo.

Installation

pnpm

pnpm add agent-economy-wallet

Three Developer Personas

The SDK serves three types of developers:

Merchant

You have an API or data source to monetize. Gate endpoints with x402, publish your manifest, and register on-chain.

Buyer Agent

Your AI agent needs external data. Give it a wallet, discover merchants on-chain, and pay autonomously.

Hybrid

Sell one service, buy others. A code review agent that pays a scraping agent for context.

Quick Examples

Initialize a Wallet

import { AgentWallet } from "agent-economy-wallet";

const wallet = new AgentWallet({
  cluster: "devnet",
  keystorePath: "./my-keys",
});

const info = await wallet.initialize();
console.log(`Address: ${info.address}`);
console.log(`SOL Balance: ${info.balances.sol}`);

Merchant: Gate an Endpoint

import express from "express";
import { createCoreServices, createX402Paywall, USDC_MINT } from "agent-economy-wallet";

const app = express();
const services = createCoreServices();

// Require 0.1 USDC payment
const paywall = createX402Paywall(services, 100_000, USDC_MINT);

app.get("/api/premium-data", paywall, (req, res) => {
  res.json({ data: "Agents rule the world" });
});

app.listen(3000);

Buyer: Discover & Pay

import { discoverRegistry, X402Client } from "agent-economy-wallet";

const agents = await discoverRegistry(connection, 100);
console.log("Found agents:", agents);

const response = await wallet.services.x402Client.fetchWithPayment(
  "http://merchant.com/api/premium-data",
  { method: "GET" }
);

Register On-Chain

import { buildRegistrationTx } from "agent-economy-wallet";

const txRecord = await buildRegistrationTx(
  connection,
  wallet.getAddress(),
  "https://my-agent.com/.well-known/agent.json"
);

const result = await wallet.signAndSendTransaction(txRecord);
console.log(`Registered! Signature: ${result.signature}`);

Full API Surface

Export	Category	Description
AgentWallet	Core	Wallet creation, signing, balance queries
KeyManager	Core	AES-256-GCM encrypted keystore
PolicyEngine	Core	Spending policy enforcement
AuditLogger	Core	Transaction audit trail
createCoreServices	Core	Service factory for full initialization
SolanaConnection	Core	Managed RPC connection
TransactionBuilder	Protocol	Construct and sign Solana transactions
SplTokenService	Protocol	SPL token operations (mint, transfer, ATA)
X402Client	Protocol	Buyer-side x402 payment handling
X402ServerService	Protocol	Merchant-side x402 verification
createX402Paywall	Middleware	Express middleware for x402 gating
discoverRegistry	Registry	Scan on-chain registry for merchants
buildRegistrationTx	Registry	Build SPL Memo registration transaction
getRegistryAddress	Registry	Get the registry coordination wallet
MasterFunder	Relay	Auto-fund new agent wallets
KoraService	Relay	Gasless transaction relay
WELL_KNOWN_TOKENS	Utility	Token symbol → mint address mapping