Introduction

Clawd402 is a protocol integration layer that enables OpenClaw AI agents to autonomously transact using the x402 payment protocol. Transform OpenClaw agents from read-only information processors into economically autonomous entities capable of purchasing data, subscribing to services, and executing value transfers—without human intervention.

What is Clawd402?

Clawd402 bridges autonomous agent frameworks with HTTP-native payment infrastructure, eliminating payment friction in the emerging agentic economy. Instead of building custom payment logic for every agent workflow, Clawd402 provides a standardized interface that handles:

• x402 Payment Discovery: Automatic HTTP 402 response handling and payment request parsing

• Multi-Chain Settlement: USDC/EURC payments across Base, Polygon, Solana, and Stellar (2-second average settlement)

• Payment & Receipt Management: Make payments for services and receive payments for work performed

• Security & Approval Policies: Configurable spending limits and approval workflows for autonomous operation

• OpenClaw Native Integration: Natural language payment instructions via OpenClaw tool system

Core capabilities

Capability	Purpose
HTTP 402 Payment Protocol	Automatic payment discovery and negotiation via x402 standard
Multi-Chain Payments	USDC/EURC settlements on Base, Polygon, Solana, Stellar
Make & Receive Payments	Purchase services AND earn revenue as autonomous agent
Subscription Management	Automated recurring payments for continuous service access
Instant Settlement	Average 2-second blockchain confirmation (vs 2-3 days traditional)
Low-Cost Transfers	~$0.03 per transaction (vs 3% credit card fees)
Non-Custodial Security	Agents maintain control of private keys with hardware wallet support
Approval Workflows	Spending limits, human-in-the-loop for high-value transactions

How it works

import { Clawd402Tool } from '@clawd402/openclaw-plugin'

// Add payment capabilities to OpenClaw agent
const paymentTool = new Clawd402Tool({
  chains: ['base', 'polygon', 'solana'],
  wallet: { type: 'hardware', device: 'ledger' },
  approvalPolicy: {
    maxPerTransaction: 100,  // USDC
    dailyLimit: 1000,
    requireApproval: (amount) => amount > 50
  }
})

agent.addTool(paymentTool)

// Agent can now make payments via natural language
agent.run("Purchase premium weather data for NYC using x402 protocol")
// → Clawd402 intercepts HTTP 402, parses payment details,
//   constructs USDC transaction, settles on Base chain (~2 seconds)

// Agent can also receive payments for services
agent.run("Analyze this dataset and charge $10 USDC via x402")

Use cases

Autonomous Research Agents: Purchase access to premium data sources, research reports, and paid APIs without human intervention

AI-Powered API Marketplaces: Monetize specialized AI models with per-request pricing for agent consumers (micropayments economically viable)

Agentic Workforce Compensation: AI agents earn payments for services rendered (code review, data analysis, task completion)

Cross-Agent Service Marketplaces: Agents discover, negotiate, and pay for services from other agents autonomously

Subscription Services: Agents automatically renew monthly subscriptions to data feeds, enhanced API limits, and continuous services

Architecture overview

┌─────────────────────────────────────────────────────────────┐
│                 OpenClaw Agent Runtime                      │
│     "Purchase premium weather data for NYC" → Intent        │
└────────────────────────┬────────────────────────────────────┘
                         │ OpenClaw Tool Interface
                         ▼
┌─────────────────────────────────────────────────────────────┐
│                  Clawd402 Integration Layer                 │
│  ┌──────────────────────────────────────────────────────┐   │
│  │  Payment Discovery (HTTP 402 → Payment Details)     │   │
│  │  Transaction Construction (USDC on Base/Polygon)     │   │
│  │  Settlement Verification (2-second confirmation)     │   │
│  │  Security & Approval (Spending limits, policies)     │   │
│  └──────────────────────────────────────────────────────┘   │
└────────────────────────┬────────────────────────────────────┘
                         │ x402 Protocol (HTTP 402 + Blockchain)
                         ▼
┌─────────────────────────────────────────────────────────────┐
│               Multi-Chain Settlement Layer                  │
│  ┌──────────┐  ┌──────────┐  ┌──────────┐  ┌──────────┐   │
│  │   Base   │  │ Polygon  │  │  Solana  │  │ Stellar  │   │
│  │USDC/EURC │  │USDC/EURC │  │   USDC   │  │  USDC    │   │
│  │ EIP-3009 │  │ EIP-3009 │  │  Native  │  │  Native  │   │
│  └──────────┘  └──────────┘  └──────────┘  └──────────┘   │
│         Average Settlement: 2 seconds                       │
└─────────────────────────────────────────────────────────────┘

Next steps

Quickstart Install Clawd402 and execute your first transaction in 5 minutes
Guides Step-by-step tutorials for common integration patterns
API Reference Complete documentation for SDK methods and REST endpoints
Security Best practices for production deployment

Get help

• Documentation: You're reading it

• GitHub: github.com/clawd402

• Discord: discord.gg/clawd402

• Email: [email protected]