Acaia Umbra Lunar Coffee Scales | 2 sellers, live prices, prepared checkout

Built for shopping agents: what RoboTrunk does for every product

We asked shopping agents, including Meta's Muse first-hand, what they need from a store. This is what they asked for, and what we have built.

RoboTrunk is working through its catalogue, so a step may not be done for this one yet. Where a step is done per product, the line ends with what is done for this product.

• Deep research: We read the maker's manual, independent reviews, video review transcripts and the store's own page, and publish each finding with its source and the date read. check_product returns them with a source for each. This product: 19 checked facts, research depth store data, checked 2026-09-26T09:13:16.014Z, in the evidence pack.
• Receipts: Every published fact has a receipt showing its source quote. check_product and get_product return the checked facts that have one. This product: each checked fact listed below has one; the source quotes are in the evidence pack.
• Safety: check_product asks the product-safety regulators live (US CPSC, NHTSA and FDA, Health Canada, the UK's OPSS, Australia's ACCC) whether a recall names a product, listed here or not, and flags a match with its notice; a recall never blocks the buyer. This product: this page holds no recall result for it yet; check_product asks the regulators now.
• Recall watch: watch_recalls tells the buyer if a product bought here is recalled later.
• Second-hand listings: check_listing runs the same recall check on a second-hand listing someone found, and adds what the listing leaves out and the price new.
• The real price: The full price to the buyer's country, with shipping and tax, each part quoted from the store's policy or, where a part is not settled, what the total depends on: check_product and search_catalog take the buyer's country and postcode. This product: this store's price was read from its catalogue at 2026-10-20T19:34:58.344Z.
• A checkout that finishes: RoboTrunk lists only stores whose agent checkout it has verified. create_checkout prepares the order at the store; complete_checkout returns a link to the store's own checkout. The checkout can be finished in either of two ways: the person taps the link in their own browser, or their agent opens it and completes the checkout. RoboTrunk checks the store's total against a budget ceiling before it issues the link. Payment always happens on the store's own page, and RoboTrunk never holds the money. No store pays for placement; RoboTrunk may earn a commission from some stores via their affiliate programs.
• Markdown copy: Every page has a Markdown copy: this page's copy.
• Photos and ratings: Search results carry the product photo and, where the store's own page publishes one, its rating (search_catalog).
• Fit answers: check_fit answers whether a listing fits a car, pram or bottle, with the exact quote from the store's page, or says it is not known.
• Back-in-stock watches: watch_back_in_stock starts a watch on a listing the store shows as sold out; get_back_in_stock_watch shows when it is back in stock.
• Maker's manual: ask_product_manual answers from the maker's manual with the exact passage and page, or says the manual does not cover it.
• Tools and guide: Every tool and its description is at https://robotrunk.com/mcp; the guide is at /agents.md.
• Research from other stores: Coming soon: reading other stores' listings of the same product as research sources.

Checked facts

Each fact below was checked against the source it cites before it was published. Each carries that source's link and the time RoboTrunk read it. 19 checked facts, checked 2026-09-26T09:13:16.014Z. Research depth: store data. Store data: every fact here was written from the product data published by 2 stores that sell this same product (acaia-co, alternativebrewing-com-au), merged into one text with every line tagged with the store that said it, and each fact's quote was found word for word in that text. No outside source was read and no web search was made. The grader then checked each fact against that text. A deeper read with outside sources may follow later.

These facts were checked on acaia.co's listing of the same product, not on this store's listing.

• Display and connectivity: The scale has no display and communicates real-time measurements to other Acaia scales using Magic Relay.. Source: https://acaianew.myshopify.com/products.json (listing), read 2026-09-25T19:01:03.548Z.
• Standalone use conflict: acaia-co says it can work as a standalone scale through Acaia smartphone apps, but Alternative Brewing says an Acaia scale is required.. Source: https://acaianew.myshopify.com/products.json (listing), read 2026-09-25T19:01:03.548Z.
• Requirement conflict: Alternative Brewing states that an Acaia scale is required, conflicting with acaia-co's standalone-use statement.. Source: https://acaianew.myshopify.com/products.json (listing), read 2026-09-25T19:01:03.548Z.
• Materials: Alternative Brewing specifies anodised aluminium and polycarbonate.. Source: https://acaianew.myshopify.com/products.json (listing), read 2026-09-25T19:01:03.548Z.
• Weight range: The specified weight range is 0.01 g to 1000 g.. Source: https://acaianew.myshopify.com/products.json (listing), read 2026-09-25T19:01:03.548Z.
• Units: It measures in grams and ounces.. Source: https://acaianew.myshopify.com/products.json (listing), read 2026-09-25T19:01:03.548Z.
• Accuracy: The specified measurement accuracy is 0.1 g.. Source: https://acaianew.myshopify.com/products.json (listing), read 2026-09-25T19:01:03.548Z.
• Repeatability and linearity: Repeatability and linearity are each specified as 0.1 g.. Source: https://acaianew.myshopify.com/products.json (listing), read 2026-09-25T19:01:03.548Z.
• Compatibility: Alternative Brewing lists Acaia Lunar AL008, AL009, AL010, AL012, and AL013, plus Pearl Series PS003, PS004, AP007, AP008, and AP009 through the Acaia App.. Source: https://acaianew.myshopify.com/products.json (listing), read 2026-09-25T19:01:03.548Z.
• Connectivity: The specified connections are Bluetooth and Magic Relay.. Source: https://acaianew.myshopify.com/products.json (listing), read 2026-09-25T19:01:03.548Z.
• Battery: It uses a USB-C rechargeable 3.7 V, 1100 mAh lithium-ion battery.. Source: https://acaianew.myshopify.com/products.json (listing), read 2026-09-25T19:01:03.548Z.
• Battery life: Alternative Brewing specifies up to 48 hours active use and 14 days on standby.. Source: https://acaianew.myshopify.com/products.json (listing), read 2026-09-25T19:01:03.548Z.
• Water resistance: The specification describes it as splash-resistant.. Source: https://acaianew.myshopify.com/products.json (listing), read 2026-09-25T19:01:03.548Z.
• Dimensions: Its specified dimensions are 105 mm wide by 105 mm deep by 15 mm high.. Source: https://acaianew.myshopify.com/products.json (listing), read 2026-09-25T19:01:03.548Z.
• Weight: Its specified weight is approximately 300 g, with a tolerance of 5 g.. Source: https://acaianew.myshopify.com/products.json (listing), read 2026-09-25T19:01:03.548Z.
• Included items: The package includes one scale, one USB-C cable, one 100 g calibration weight, one heat-resistant pad, two non-slip strips, and two friction-reduction strips.. Source: https://acaianew.myshopify.com/products.json (listing), read 2026-09-25T19:01:03.548Z.
• Warranty: Alternative Brewing lists a 24-month warranty, marked with an unexplained asterisk.. Source: https://acaianew.myshopify.com/products.json (listing), read 2026-09-25T19:01:03.548Z.
• SKU: Both stores list SKU AUL001.. Source: https://acaianew.myshopify.com/products.json (listing), read 2026-09-25T19:01:03.548Z.
• GTIN: The listed GTIN is 00659465184895.. Source: https://acaianew.myshopify.com/products.json (listing), read 2026-09-25T19:01:03.548Z.

The full evidence pack, with every citation, source and gap.

This page is published by RoboTrunk, a store built for shopping agents.

The store named on this page sells the product and ships it. RoboTrunk is not
the seller and never holds the money.

Buying works in one path. RoboTrunk's tools prepare a checkout at that store,
then hand back a short-lived link. The person approves the total; once RoboTrunk
has checked the store's total against it, the person is given the checkout link to
tap in their own browser, or, if the person prefers and gives permission, their
agent may open the link and finish there, and payment always happens on the
store's own checkout page. RoboTrunk never takes the payment or sees a card.

Where the rest of this site is:

- /agent/story.md is what RoboTrunk is and how it works, in full.
- /agent/tools.json is every tool, its arguments and its answers.
- /agent/merchants is every store you can buy from through RoboTrunk.
- /products/ucp is every store's indexed products.
- /products/search is one search across every store, in plain words.

• What RoboTrunk is
• The tools and how to call them
• The stores you can buy from
• Every store's products
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