# Agent Commerce Guide > Checkout, orders and payment acceptance for AI buyers Read-only editorial reference. Examples and calculations are illustrative, not authorization to transact. Product affiliations and source limitations are disclosed in the guides. ## Agent access - [MCP endpoint](https://agentcommerceguide.com/mcp): public read-only Streamable HTTP; tools `search_guides` and `get_guide`. - [Search index](https://agentcommerceguide.com/search.json): titles, descriptions, canonical URLs and Markdown resources. - [Full text](https://agentcommerceguide.com/llms-full.txt): the same published guide content. - [Editorial method](https://agentcommerceguide.com/methodology/). ## Guides - [Agentic Commerce for Merchants: Prepare Your Store](https://agentcommerceguide.com/markdown/CG01.md): Prepare your store for agent purchases. Find platform guides, checkout requirements and a practical readiness checklist for merchants. - [How AI Shopping Agents Buy: A Merchant Learning Path](https://agentcommerceguide.com/markdown/CG02.md): Follow an AI shopping agent from product discovery to consent, payment and fulfilment. Learn which steps a merchant needs to support. - [Agentic Checkout: Design a Reliable Agent Purchase Flow](https://agentcommerceguide.com/markdown/CG03.md): Design a reliable agentic checkout. Map sessions, consent, payment and order state, then choose the right implementation guide. - [Agentic Commerce Platforms: Shopify, WooCommerce and Custom Stores](https://agentcommerceguide.com/markdown/CG04.md): Compare agentic commerce paths for Shopify, WooCommerce and custom stores. Check eligibility, integrations and checkout ownership. - [Agentic Commerce Standards: Checkout, Trust and Payment Layers](https://agentcommerceguide.com/markdown/CG05.md): Understand the catalog, checkout, trust and payment layers of agentic commerce. Find merchant guides to ACP, UCP and related standards. - [Compare Agentic Commerce Solutions by Merchant Task](https://agentcommerceguide.com/markdown/CG06.md): Find an agentic commerce comparison for your merchant task. Review evidence criteria, platform routes and checkout requirements. - [Agentic Commerce Explained: What Merchants Need to Know](https://agentcommerceguide.com/markdown/CG07.md): Understand agentic commerce from a merchant perspective. Distinguish AI referrals from completed agent purchases and plan a measurable pilot. - [Accept Payments from AI Agents: A Merchant Implementation Guide](https://agentcommerceguide.com/markdown/CG08.md): Prepare a merchant flow for AI agent payments. Connect an eligible offer, payment authorization, order state and confirmed fulfilment. - [Agentic Commerce Authentication: Buyer Consent and Agent Trust](https://agentcommerceguide.com/markdown/CG09.md): Verify the buyer, agent and purchase consent as separate checks. Review credentials, changed terms and evidence for disputed orders. - [AI Agent Checkout API: Sessions, Orders and Failure Handling](https://agentcommerceguide.com/markdown/CG10.md): Plan an AI agent checkout API with sessions, validated cart terms, retry handling and order status. Review a practical endpoint contract. - [Agentic Commerce Order Management: Payment to Fulfilment](https://agentcommerceguide.com/markdown/CG11.md): Model the agent order lifecycle from checkout to delivery. Handle stock reservations, duplicate attempts and paid-but-undelivered orders. - [Agentic Commerce Chargebacks, Refunds and Disputes](https://agentcommerceguide.com/markdown/CG12.md): Compare refunds, cancellations and chargebacks in agentic commerce. Build a merchant playbook for consent, delivery evidence and recovery. - [Agentic Commerce Fraud: Merchant Risks and Controls](https://agentcommerceguide.com/markdown/CG13.md): Map fraud risks in agent purchases and choose merchant controls. Review consent, replay protection, fulfilment and risk escalation. - [Agentic Commerce Protocol: ACP Merchant Integration Guide](https://agentcommerceguide.com/markdown/CG14.md): Understand ACP merchant checkout flows and integration requirements. Review sessions, payment, order responses and current eligibility. - [Universal Commerce Protocol: UCP Guide for Merchants](https://agentcommerceguide.com/markdown/CG15.md): Learn what UCP covers and how merchants expose commerce capabilities. Separate protocol integration from Google channel eligibility. - [Agentic Commerce Payment Gateways: Requirements for Merchants](https://agentcommerceguide.com/markdown/CG16.md): Evaluate payment providers for agentic checkout. Check credential handling, settlement, geography, refunds and operational evidence. - [Shopify Agentic Commerce: Channels, Eligibility and Setup](https://agentcommerceguide.com/markdown/CG17.md): Prepare a Shopify store for agentic commerce. Check current channels, merchant eligibility, catalog requirements and order handling. - [WooCommerce Agentic Commerce: Integration Options and Testing](https://agentcommerceguide.com/markdown/CG18.md): Compare WooCommerce agentic commerce routes and plugin maturity. Review protocol support, staging tests and controlled rollout criteria. - [Add Agentic Checkout to a Custom Store](https://agentcommerceguide.com/markdown/CG19.md): Add agentic checkout to a custom store with a clear API boundary, payment authority and order lifecycle. Plan a bounded integration pilot. - [ChatGPT Instant Checkout: Current Merchant Requirements](https://agentcommerceguide.com/markdown/CG20.md): Check current ChatGPT merchant checkout options. Distinguish product discovery, referrals and Instant Checkout eligibility before integrating. - [ACP vs UCP: Merchant Integration and Checkout Comparison](https://agentcommerceguide.com/markdown/CG21.md): Compare ACP and UCP for merchant integration. Review protocol scope, checkout flows, payment dependencies and channel eligibility. - [Agentic Checkout Providers: Compare Merchant Requirements](https://agentcommerceguide.com/markdown/CG22.md): Compare agentic checkout providers by protocols, payment ownership, onboarding and operational evidence. Choose a pilot for your store. - [Agentic Checkout Readiness Checklist for Merchants](https://agentcommerceguide.com/markdown/CG23.md): Check your store’s agent checkout readiness. Review consent, payment, order status and recovery, then export concrete implementation blockers. - [About Agent Commerce Guide](https://agentcommerceguide.com/markdown/CG24.md): Learn who publishes Agent Commerce Guide, our focus on merchant checkout, channels and fulfilment, and how we disclose product relationships and handle corrections. - [How Agent Commerce Guide Evaluates Products and Evidence](https://agentcommerceguide.com/markdown/CG25.md): See how Agent Commerce Guide checks merchant checkout, channels and fulfilment, records evidence and limitations, and separates documented claims from hands-on results.