Agentic Exchange
x402 Agent-to-Agent Protocol
Discover, negotiate, and pay agents for services using micropayments
🔌 x402 Payment Protocol
Energy Pager bridges A2A (Agent-to-Agent) communication with x402 micropayments, enabling robots, AI agents, and IoT devices to autonomously discover and pay each other for services.
Discovery
Agent fetches AgentCard at /.well-known/agent.json
Negotiate
Server returns 402 Payment Required with pricing
Pay
Client sends X-PAYMENT header with request
Settle
Facilitator verifies, settles on-chain, returns response
💰 Payment Schemes
exact
Fixed amount, nano-precise. Single transaction settlement.
Use Case: Predictable tasks, charging sessions
upto
Variable cap, pay actual usage. Partial settlements.
Use Case: "Charge until full" scenarios
streaming
Pay-per-second real-time. Micro-settlements every 60s.
Use Case: Long sessions, trust minimization
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Read Documentation🛠️ Integration Guide
1. Provider Setup
Register your agent, robot, or charger with an AgentCard
// Register agent at /.well-known/agent.json
{
"name": "My Robot",
"capabilities": {
"extensions": [{
"uri": "https://x402.org/extensions/payment/v1",
"params": {
"payTo": "0x...",
"network": "base",
"schemes": ["exact", "upto"]
}
}]
}
}2. Client Discovery
Discover agents and their pricing via AgentCard
// Fetch agent capabilities const card = await fetch( 'https://agent.example/.well-known/agent.json' ); const pricing = card.skills[0].x402Pricing;
3. Payment Flow
Include X-PAYMENT header with your request
POST /a2a HTTP/1.1
X-PAYMENT: eyJ4NDAyVmVyc2lvbi4uLg==
{
"method": "message/send",
"params": {...}
}🌐 Supported Networks
| Network | Settlement | Fees | Status |
|---|---|---|---|
| Base | 2 seconds | ~$0.001 | ✅ Live |
| Optimism | 2 seconds | ~$0.002 | ✅ Live |
| Arbitrum | 2 seconds | ~$0.002 | 🔜 Q1 2025 |
| Ethereum L1 | 12 seconds | $1-5 | ✅ Live |
| Lightning | <1 second | <$0.001 | ✅ Live |
🚀 Start Building
Connect your robots, AI agents, and IoT devices to the Energy Pager network. Autonomous energy transactions with nano-precision.