What is ecommerce-tools-api?

A rule for the typed connection between an e-commerce application and tools running across a browser window or frame. It defines shared action data, cart payloads, screenshots, outputs, and metrics.

Use it when changing cart actions, the e-commerce client, tool calls, screenshot inputs, or output and metric handling.

It keeps the two cross-window interfaces and their data formats separate and consistent, avoiding incorrect imports and mismatched payloads.

ecommerce-tools-api — Cursor rule for Cursor by shapediver

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.

Clone the repo

git clone --depth 1 https://github.com/shapediver/AppBuilderSdk

Made for: Cursor.

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/rules/shapediver/appbuildersdk/ecommerce-tools-api/github.svg)](https://agentmods.dev/rules/shapediver/appbuildersdk/ecommerce-tools-api)

Your own site

<a href="https://agentmods.dev/rules/shapediver/appbuildersdk/ecommerce-tools-api"><img src="https://agentmods.dev/badge/rules/shapediver/appbuildersdk/ecommerce-tools-api/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/rules/shapediver/appbuildersdk/ecommerce-tools-api"><img src="https://agentmods.dev/badge/rules/shapediver/appbuildersdk/ecommerce-tools-api.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 0 Nothing until a file matches its globs; then the whole rule loads.

When invoked 823 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	$0.00000	$0.00823
Opus 5.5	$0.00000	$0.00329
Sonnet 5.5	$0.00000	$0.00165
Haiku 4.5	$0.00000	$0.00082

Measured yesterday against content hash 2225c993642f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ecommerce-tools-api 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 yesterday.

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.

.cursor/rules/ecommerce-tools-api.mdc · 46 lines

How it starts

The opening of the file, as written. The whole thing — 46 lines — stays where its author put it; the contents beside it link to each section on GitHub.

E-commerce connector and tools API

Keep two typed CrossWindow facades. They share action cores. They do not share one RPC.

Playwright parent/iframe setup is in .cursor/rules/e2e-playwright.mdc. Action-core behavior is in .cursor/rules/appbuilder-actions.mdc.

Schemas

Canonical action-prop Zod is features/appbuilder/config/appbuilderActionsTypecheck.ts (UI-free). It includes parameter-source schemas because setParameterValue.source and model-state sources share createModelState props.
Settings JSON (appbuildertypecheck.ts) and the e-commerce client (ecommerceapitypecheck.ts) import that file.
Do not import appbuildertypecheck.ts from the e-commerce client. That module pulls Mantine theme and widget validation.
features/agent-tools/config must not import @mantine/ or @shapediver/. IAgentTheme is MantineThemeOverrideProps, the JSON theme mirror. getTheme still sends the published theme; functions are already stripped before it is stored.
IAddItemToCartData is the cart-plugin payload, not addToCart action props.
The screenshot tool schema is stricter than viewportScreenshotPropsSchema. Output is image_url. Input is contentType, quality, and resolution.
getOutput and getMetric share getOutputContent. Metric maps content to value.

Runtime

Do not put live APIs on window (__appBuilderECommerceConnector, __appBuilderToolsApi).
createECommerceApiConnectorActions is Zustand-only (no hooks, no agent-tools import).
useECommerceApiConnectorActions passes componentContext.actions so host camera and other host keys go through findAppBuilderActionRegistration.
Tools handshake only when an agent window is set. A Shopify iframe must not always use window.parent; that spams Tools.
Do not add product query params or window hooks for tests.
Deployed appbuilder.shapediver.com sends Cross-Origin-Opener-Policy: same-origin, so a top-level page cannot handshake a localhost popup (window.opener is null).

Read the full file on GitHub · 46 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.

yesterday Changed · +1 lines 2225c993642f
2d ago First seen · 45 lines · 0 tokens per session scan A 8f4675641682

Subscribe to this mod's changes

ecommerce-tools-api is a cursor rule published in the GitHub repository shapediver/AppBuilderSdk (15 stars, last pushed yesterday), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 823 tokens. 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 2026-10-15.

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