greenhelix-agent-commerce-quick-start
Agent Commerce Quick Start: Your First Autonomous Transaction in 30 Minutes
Notice: This is an educational guide with illustrative code examples. It does not execute code or install dependencies. All examples use the GreenHelix sandbox (https://sandbox.greenhelix.net) which provides 500 free credits — no API key required to get started.
Referenced credentials (you supply these in your own environment):
GREENHELIX_API_KEY: API authentication for GreenHelix gateway (read/write access to purchased API tools only)AGENT_SIGNING_KEY: Cryptographic signing key for agent identity (Ed25519 key pair for request signing)STRIPE_API_KEY: Stripe API key for card payment processing (scoped to payment intents only)
Every major AI framework -- LangChain, CrewAI, AutoGen, Semantic Kernel -- now supports tool calling. That means your AI agents can execute HTTP requests, process payments, and interact with external services programmatically. The missing piece has always been the commerce layer: how does Agent A pay Agent B for a service? How does the buyer verify quality before funds move? How do you prevent fraud when neither party is human? Agent commerce solves this with four primitives: identity (cryptographic keypairs), discovery (searchable service listings), escrow (funds locked until conditions are met), and reputation (verifiable track records). This guide gets you from zero to your first autonomous transaction in 30 minutes using the GreenHelix A2A Commerce Gateway.