# UPPAbaby Mesa Max Extra Base \| live price, 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:* 14 checked facts, research depth trimmed read, checked 2026-10-21T01:59:22.838Z, in the [evidence pack](/agent/evidence/megababiesusa-com--uppababy-mesa-max-base). - **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](/agent/evidence/megababiesusa-com--uppababy-mesa-max-base). - **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 2026-10-21T19:30:43.904Z. - **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](https://robotrunk.com/products/ucp/megababiesusa-com/7977583673598.md). - **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](/agents.md). - **Research from other stores:** Coming soon: reading other stores' listings of the same product as research sources. Sold and shipped by megababiesusa\.com, megababiesusa.com; payment happens on the store's own checkout. Brand: UPPAbaby ## Variants - Default Title: USD 159.99; out of stock. Variant id: `gid://shopify/ProductVariant/43824284303614` - Seller: megababiesusa\.com. Price: USD 159\.99. Stock: out of stock. Variant: Default Title, variant id `gid://shopify/ProductVariant/43824284303614`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://top-stroll.myshopify.com/products/uppababy-mesa-max-base). [Comparison page](/compare/want/infant-car-seat-bases-that-install-with-latch-connectors-9e132219). [Get ready to buy from megababiesusa\.com: prepare checkout](/checkout-prepare?merchant=megababiesusa-com&product_id=gid%3A%2F%2Fshopify%2FProduct%2F7977583673598&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F43824284303614). ## 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. 14 checked facts, checked 2026-10-21T01:59:22.838Z. Research depth: trimmed read. Deep read: the store's own data and 3 outside pages \(the store's own product page; regulator recall search \(CPSC \(United States\)\); regulator recall search \(Health Canada\)\), each read in full by RoboTrunk and trimmed to its main content, then written up and checked\. Facts from the maker or a manual quote the page word for word; what real users report is summarised with a link to the page read\. Recall status was checked directly with CPSC \(United States\), Health Canada: The CPSC search returned no recall records for UPPAbaby Mesa Max Extra Base\. Health Canada returned four UPPAbaby records, all for other products \(RIDGE jogging strollers, RumbleSeat adapters, stroller/RumbleSeat bumper bars, and a Peg Perego car seat adapter\), none for this Mesa Max Extra Base\. - listing title and vendor: The store listing names the product UPPAbaby Mesa Max Extra Base and the vendor UPPAbaby\.. Source: (listing), read 2026-10-20T19:22:06.774Z. - what it is: This is an extra Mesa Max infant car seat base intended for multi\-car families\.. Source: (guide), read 2026-10-21T01:47:05.540Z. - included with seat: The base is included with a Mesa Max infant car seat purchase, so buyers should check whether they already have one\.. Source: (guide), read 2026-10-21T01:47:05.540Z. - installation system: The SMARTSecure System is claimed to install in seconds\.. Source: (guide), read 2026-10-21T01:47:05.540Z. - leveling: Bubble level indicators are on both sides of the base\.. Source: (guide), read 2026-10-21T01:47:05.540Z. - tightness indicator: A red\-to\-green indicator shows when the base is tight\.. Source: (guide), read 2026-10-21T01:47:05.540Z. - LATCH: The LATCH system is auto\-retracting for installation\.. Source: (guide), read 2026-10-21T01:47:05.540Z. - load leg: The load leg is designed to limit forward rotation in a frontal crash and reduce potential head and neck injury\.. Source: (guide), read 2026-10-21T01:47:05.540Z. - seat belt installation: A built\-in lock\-off is provided for secure seat belt installation\.. Source: (guide), read 2026-10-21T01:47:05.540Z. - shape: The base is described as streamlined and low\-profile with a finished bottom\.. Source: (guide), read 2026-10-21T01:47:05.540Z. - SKU: The store lists SKU 0901\-MMB\-US\.. Source: (guide), read 2026-10-21T01:47:05.540Z. - barcode: Structured data lists the GTIN/barcode as 810030095477\.. Source: (guide), read 2026-10-21T01:47:05.540Z. - weight: The store's structured variant data lists a weight value of 4082 with no unit shown\.. Source: (guide), read 2026-10-21T01:47:05.540Z. - brand and category: Structured data names the brand UPPAbaby and the category Car Seat Base\.. Source: (guide), read 2026-10-21T01:47:05.540Z. The full evidence pack, with every citation, source and gap: [evidence pack](/agent/evidence/megababiesusa-com--uppababy-mesa-max-base) ## Questions we researched but could not confirm Every fact above is cited. To find them we read the store listing and the recall records of CPSC \(United States\) and Health Canada and searched for the maker's page, the manual, regulator recall notices, owner reviews, blogs, owner forums and video reviews. We also chased the questions below across those sources and found no reliable answer, so you know exactly where the evidence ends and never have to guess. - What are the base's exact dimensions? - What unit is the listed 4082 weight value in? - What is the base's weight in pounds and kilograms? - Is this base compatible with a non\-Max Mesa infant car seat? - Which vehicle seat positions or LATCH systems is it rated for? - What safety standards or certifications does the base meet? - What are the care and cleaning instructions for the base? - What warnings does UPPAbaby give for installing and using this base? - What exactly is included when buying the extra base? - What is UPPAbaby's warranty for this base? - Does installation require any tools? - How do you remove the base after installation? - How does the load leg adjust to different vehicle floors? - Does the base fit all model years of the Mesa Max? To buy this through RoboTrunk, pass merchant `megababiesusa-com`, product_id `gid://shopify/Product/7977583673598` and one variant_id from the list above. Product image of UPPAbaby Mesa Max Extra Base, supplied by megababiesusa\.com: This product on megababiesusa.com: Retrieved 2026-10-21T19:30:43.904Z from 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. 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