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PayStabl Developer Documentation

Welcome to PayStabl — the programmable wallet infrastructure for AI agents. Enable your agents to autonomously pay for APIs, services, and even other agents using secure onchain payments and composable protocols.

🔗 Quick Links​

💡 What is PayStabl?​

PayStabl gives your AI agents a smart wallet, identity, and policies so they can autonomously:

  • Pay for access to paid APIs
  • Subscribe to premium services
  • Send payments to other agents
  • Operate in trustless environments

It's built on Coinbase Developer Platform and designed to integrate with open agent ecosystems like Claude, LangGraph, n8n, and ACP.

🚀 Core Features​

x402 Protocol Support​

Handles HTTP 402 Payment Required responses automatically using x402 headers and CDP wallet signatures.

Agent-to-Agent Payments​

Pay other agents for services, data, or tools. Useful for marketplaces, automation chains, and AI economies.

Policy Governance​

Set:

  • Daily/transactional spending limits
  • Approved addresses
  • Session keys with expiration
  • Multi-sig or approval thresholds

Security​

  • Gasless transactions via CDP
  • Wallet-based isolation per agent
  • Signature-based authentication
  • Transparent transaction history

🏗️ Core Components​

Framework Integrations​

  • MCP Server — Tools for Claude, LangGraph, and MCP clients
  • LangGraph — Add PayStablNode to any workflow (coming soon)
  • n8n Integration — Use PayStabl as a no-code connector (coming soon)
  • ACP-Compatible Agents — Launch monetized agents via WrapAgent (coming soon)

Payment Tools​

  • pay_api_endpoint — Pay and access any paid API
  • pay_agent — Send value between registered agents
  • getTransactions — See transaction history

💡 Example: Autonomous API Payment​

// Agent pays for premium weather data
const response = await agent.pay_api_endpoint({
  url: "https://api.weatherservice.com/premium",
  agentId: "weather_agent_001"
});

// Reuse x402 payment header for API access
const data = await fetch(response.url, {
  headers: { "X-Payment": response.xPaymentHeader }
});

🛠️ Support​