Tag: x402

Diagram of an AI agent holding a USDC wallet with spending-limit guardrails enforced before an onchain transfer
Commerce

What Is Circle Agent Stack? USDC Wallets for AI Agents

What is Circle Agent Stack? A neutral guide to USDC agent wallets,…

By Surya Koritala
24 Min Read
Two AI agents exchanging a USDC payment over the A2A x402 protocol on the Base network
Commerce

A2A x402 Tutorial: Build Agent-to-Agent USDC Payments

This a2a x402 tutorial walks the full agent-to-agent USDC payment flow in…

By Surya Koritala
36 Min Read
Diagram of the AP2 mandate chain showing a signed Intent Mandate flowing into a merchant Cart Mandate and a user-signed Payment Mandate settling in USDC
Commerce

AP2 Mandate Chain Python Tutorial: Intent to Cart to Pay

This AP2 mandate chain Python tutorial walks you through signing an Intent…

By Surya Koritala
40 Min Read
Diagram of an AI agent paying a paywalled API over HTTP 402 with USDC on Base, showing the request, 402 payment-required response, and X-PAYMENT retry
Commerce

x402 Payments for an AI Agent in Python: 2026 Tutorial

Add x402 payments to an AI agent in Python: a testnet-first tutorial…

By Surya Koritala
30 Min Read
Abstract visualization of AI agents exchanging scoped payment tokens across a network of merchants
Commerce

Agentic Commerce Terms Explained: A Builder Glossary

A builder-focused glossary of agentic commerce terms: Shared Payment Token, AP2 mandates,…

By Surya Koritala
26 Min Read
Agentic payment protocols compared — ACP, AP2, x402, MPP, and Visa TAP across the authorization, checkout, and settlement layers
Commerce

Agentic Payment Protocols Compared: ACP, AP2, x402, MPP

Agentic payment protocols compared: how ACP, AP2, x402, MPP, and Visa TAP…

By Surya Koritala
13 Min Read