acp-checkout-rest
Implement the ACP REST checkout API — create, update, retrieve, complete, and cancel checkout sessions. Use when building merchant-side checkout endpoints, handling the checkout session state machine, or integrating with AI agent checkout flows.
npx skills add majiayu000/claude-skill-registry --skill acp-checkout-rest --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# ACP Checkout — REST Binding ## Before writing code **Fetch live docs**: 1. Fetch `https://developers.openai.com/commerce/specs/checkout/` for the canonical checkout specification 2. Web-search `site:github.com agentic-commerce-protocol spec openapi checkout` for the latest OpenAPI YAML 3. Fetch `https://developers.openai.com/commerce/guides/key-concepts/` for data model details 4. Web-search `site:docs.stripe.com agentic-commerce protocol specification` for Stripe's merchant-side reference ## Conceptual Architecture ### Five Checkout Operations | Operation | Method | Path | Success | |-----------|--------|------|---------| | Create | POST | `/checkout_sessions` | 201 | | Update | POST | `/checkout_sessions/{id}` | 200 | | Retrieve | GET | `/checkout_sessions/{id}` | 200 | | Complete | POST | `/checkout_sessions/{id}/complete` | 200 | | Cancel | POST | `/checkout_sessions/{id}/cancel` | 200 | ### Session State Machine ``` not_ready_for_payment → ready_for_payment → completed | | | +──────────────────────+→ canceled ←────+ | in_progress | authentication_required ``` The five core status enum values are: `not_ready_for_payment`, `ready_for_payment`, `completed`, `canceled`, `in_prog
- Before writing code
- Conceptual Architecture
- Five Checkout Operations
- Session State Machine
- Required Headers (Every Request)
- Core Data Objects
- Monetary Values
- Messages
- Links
- Create Flow
- Update Flow
- Complete Flow
- Error Handling
What does the acp-checkout-rest skill do?
Implement the ACP REST checkout API — create, update, retrieve, complete, and cancel checkout sessions. Use when building merchant-side checkout endpoints, handling the checkout session state machine, or integrating with AI agent checkout flows.
How do I install it?
Run `npx skills add majiayu000/claude-skill-registry --skill acp-checkout-rest --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From majiayu000/claude-skill-registry, a repository with 534 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.