What is acp-conformance?

A testing and validation guide for ACP, the Agentic Commerce Protocol used to structure purchases between AI agents and merchants.

Use it to check schemas, money values, checkout flows, cancellations, payments, idempotency, security, and production readiness.

It helps find invalid data, broken checkout state changes, faulty errors, duplicate requests, security issues, and missing launch requirements before release.

acp-conformance — Skill for Claude Code by OrcaQubits

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add OrcaQubits/agentic-commerce-skills-plugins --skill acp-conformance

Clone the repo

git clone --depth 1 https://github.com/OrcaQubits/agentic-commerce-skills-plugins

Made for: Claude Code.

Or install acp-agentic-commerce, the plugin that ships this one along with the rest of its 15 skills, 1 agent.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/orcaqubits/agentic-commerce-skills-plugins/acp-conformance.svg)](https://agentmods.dev/skills/orcaqubits/agentic-commerce-skills-plugins/acp-conformance)

Your own site

<a href="https://agentmods.dev/skills/orcaqubits/agentic-commerce-skills-plugins/acp-conformance"><img src="https://agentmods.dev/badge/skills/orcaqubits/agentic-commerce-skills-plugins/acp-conformance.svg" alt="Measured on agentmods" height="20"></a>

Per session 44 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 887 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00044	$0.00887
Opus 5	$0.00022	$0.00443
Sonnet 5	$0.00009	$0.00177
Haiku 4.5	$0.00004	$0.00089

Measured 7d ago against content hash 5e816411cbd4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

acp-conformance scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

acp-agentic-commerce/skills/acp-conformance/SKILL.md · 102 lines

How it starts

The opening of the file, as written. The whole thing — 102 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ACP Conformance & Production Readiness

Before writing code

Fetch live docs:

Fetch https://developers.openai.com/commerce/guides/production/ for OpenAI's production readiness checklist
Web-search site:github.com agentic-commerce-protocol spec openapi for the latest OpenAPI specs to validate against
Web-search site:github.com agentic-commerce-protocol spec json-schema for JSON schemas
Fetch https://developers.openai.com/commerce/guides/get-started/ for onboarding requirements

Conformance Test Categories

1. Schema Validation

Validate all request/response payloads against the ACP JSON schemas
Ensure monetary amounts are integers in minor currency units (no floats)
Verify all required fields are present
Check field types match the spec (string, integer, enum values)

2. Checkout Flow Tests

Create → verify 201 response with valid CheckoutSession
Update → verify status transitions are valid
Retrieve → verify GET returns current state
Complete → verify payment processing and completed status
Cancel → verify session termination
Full flow → create → update → complete end-to-end

3. State Machine Compliance

Verify only valid status transitions occur
Test not_ready_for_payment → ready_for_payment when all data provided
Test authentication_required → completed after 3DS
Verify canceled is terminal (no transitions out)
Test concurrent requests on same session

4. Idempotency Tests

Same Idempotency-Key + same body = identical response with Idempotent-Replayed: true
Same key + different body = 422 idempotency_conflict
Concurrent duplicate = 409 idempotency_in_flight with Retry-After
Keys retained minimum 24 hours
5xx responses are NOT cached

5. Header Validation

Authorization: Bearer <token> required on all requests
API-Version required and matches spec version
Idempotency-Key required on all POST
Missing required headers → appropriate error response

Read the full file on GitHub · 102 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

7d ago First seen · 102 lines · 44 tokens per session scan A 5e816411cbd4

Subscribe to this mod's changes

acp-conformance is a skill published in the GitHub repository OrcaQubits/agentic-commerce-skills-plugins (39 stars, last pushed 3mo ago), licensed MIT. It adds 44 tokens to every session and 887 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

E-commerce Magento Testing a2a acp agentic-commerce ucp webmcp

archestra-dev-backend-tests

Use when writing or modifying Archestra backend unit tests (platform/backend/src//.test.ts) — mocking modules, stubbing globals, database fixtures, vitest projects/isolation, or test performance.

archestra-ai/archestra · 46 tokens

archestra-dev-testing

Use when deciding whether a change needs a test and at which level — unit, backend route-level integration, MSW-backed frontend integration, or e2e — or when reviewing tests for the "fluff test" anti-pattern. Start here before archestra-dev-backend-tests or archestra-dev-e2e.

archestra-ai/archestra · 68 tokens

acp-conformance