engineering

x402 Bazaar Listing Monitor: catch a vanished listing before your revenue does

ACJ Labs
Engineering
02 Aug, 2026

If you sell over x402, your buyers find you through Coinbase CDP's Bazaar discovery catalog. It's the directory that lets an agent or a buyer's client discover your payTo address and the resources…

How to integrate the catalog attribute normalizer MCP server

ACJ Labs
Engineering
27 Jul, 2026

This guide covers the mechanical integration steps for the catalog-attribute-normalizer MCP server: client configuration, authentication, and tool usage, so you can normalize product catalogs against…

How to integrate the ACJ Labs receipt extraction MCP server

ACJ Labs
Engineering
27 Jul, 2026

This guide covers the mechanical integration steps for the ACJ Labs receipt extraction MCP server: client configuration, authentication, schema definitions, and error handling, so you can consume the…

Choosing a product categorization API: five questions that separate grounded from guessing

ACJ Labs
Engineering
26 Jul, 2026

If you're mapping a product feed to the Google Product Taxonomy, you have more options than you did a year ago — a raw LLM call, a handful of categorization APIs, a feed tool with categorization…

Choosing a receipt extraction API: six questions that separate tax-aware from just-OCR

Here's the honest version of the pitch first: if all you need is vendor, date, and total off a receipt, you should probably build it yourself. A single vision-model call — GPT-4o-mini, Gemini Flash…

A wrong ABN and a smudged one look the same to OCR. We made sure ours doesn't guess.

Every Australian Business Number carries a checksum — a modulus-89 formula baked into the digits themselves, so a wrong ABN is usually mathematically detectable, not just "looks a bit off." Which…

Build vs. buy: should your bookkeeping tool parse receipts with a raw LLM call?

Here's the honest version of the pitch first: if all you need is vendor, date, and total off a receipt, you should probably build it yourself. A single vision-model call — GPT-4o-mini, Gemini Flash…

How accurate is "just ask the model to categorize it"? We measured — 1–2 of 12 checks.

ACJ Labs
Engineering
25 Jul, 2026

If you're mapping a product catalog into Google's Product Taxonomy, the obvious first move is to hand the title and description to a capable model and ask for the category. It reads well in a demo.…

The GST rule your receipt scanner doesn't know exists

A restaurant receipt and a client dinner look identical to an OCR tool. Under Australian GST rules, they aren't: entertainment expenses have their input tax credit (ITC) denied by default — GST was…

AI product classifiers hand you category IDs that don't exist. Here's how we stopped ours.

ACJ Labs
Engineering
23 Jul, 2026

Ask a capable AI model to classify a product into Google's Product Taxonomy and it will do something unsettling: return an ID that looks completely valid — right format, plausible category name — and…

Engineering