Most sellers share inventory with partners through custom integrations and nightly files. They are slow to build, they go stale between updates, and most were never designed for AI shopping assistants. CrossDigital Solutions designed Inventory Connect MCP: one secure connection that lets AI assistants and partner apps search products, check live stock, hold items and place orders, with the business in control of every partner.
A typical seller connects each partner separately: a custom API for one marketplace, a CSV or EDI file for another. Each connection takes weeks to build and keeps needing attention after launch. Access is usually all or nothing, because a partner's API key opens everything.
Between updates, the numbers drift. A marketplace shows stock that sold an hour ago, the order goes through, and someone has to cancel it and apologize to the customer.
Partners and AI assistants sell from stock data that is hours old, through integrations that each take weeks to build. The seller can't easily limit what each partner sees or does.
give every partner and AI assistant live, trustworthy stock and a safe way to hold and order it, through one connection, without the seller giving up control?
Pickup today at Miami store MIA-01.
Held for you at MIA-01. If you don't confirm, the pair goes back on sale automatically.
15:00Each new channel means a custom API project or a file feed, plus maintenance after launch. Most were never designed for AI assistants.
Seller question it can't answer: "Can a new marketplace be selling our stock next week instead of next quarter?"
Files and batch syncs run on a schedule. Anything sold in between still shows as available, and nothing holds the last unit while a shopper decides.
Shopper question it can't answer: "Is this actually in stock right now, near me?"
There's no simple way to give one partner read-only access, cap how much it can hold, or switch it off without affecting the others.
Seller question it can't answer: "Can this partner see stock but not place orders, and can I cut them off in one click?"
AI assistants will misread requests and retry calls. The server has to assume that and stay correct anyway: prices calculated on the server, holds that can't double-sell, and limits for each partner.
Why this matters now: in 2026 the large platforms settled on open protocols for agent shopping. Shopify and Google back UCP, and OpenAI and Stripe back ACP. But checkout inside the chat stalled.[4] [6] [7] Agents find the product, and the purchase often finishes somewhere else. That makes a live stock answer, and a hold that survives the hand-off, more important. Both belong to the seller's own systems, not to any one AI platform.
Channel-management tools keep stock in sync across marketplaces. The new agent-commerce standards define how an AI agent talks to a merchant. In the public material we could find, none describes holding stock for an agent while a shopper decides, or splitting stock between agent partners. Facts are cited below. Assessments are ours, as of October 2026.
| Gap | Rithum | Linnworks | Shopify | OpenAI ACP | Google UCP | Inventory Connect (concept) |
|---|---|---|---|---|---|---|
| G1 One connection for AI agents | LLM feeds to AI platforms | Third-party connectors only | Catalog API + UCP, Shopify catalog | Protocol + product feed | Protocol, select merchants | Any MCP client, any back-end system |
| G2 Stock freshness | "Real-time", no interval published | "Every 5–15 minutes" | Inventory webhooks | Refreshed feed, daily snapshots | Not described | ≤ 30 s, refreshed on change, timestamped |
| G2 Holds while the shopper decides | Not described | Not described | Not described | Not described | Not described | Timed holds, no double-selling |
| G3 Per-partner limits and stock split | Channel-level tools | Channel-level tools | Not described for agents | Merchant accepts or declines each order | Merchant of record | Scopes, caps, allocation and kill switch per partner |
"Not described" means we found nothing in the cited public pages, not that the feature can't exist. These platforms have deeper developer documentation, and they change often.
The shopper, the seller and the gap behind each failure, side by side. Pick a stage.
Each one closes a gap. The AI assistant handles the conversation. The server handles everything that has to be correct.
Partners connect once over MCP with OAuth sign-in instead of a custom build. A sandbox and tool playground let them test before going live.
On hand, minus held, minus safety stock. Cached for no more than 30 seconds, refreshed when stock changes, and every answer carries an "as of" time.
Holds last 15 minutes by default and expire on their own. Two assistants can't hold the same last unit.
Scopes (read, hold, order), quantity caps, request limits and a stock allocation for each partner, managed in an admin console with a kill switch.
Large orders wait for human approval. A retried request never creates a second order. Every call is logged with personal data removed.
AI assistants arrive over an hour and ask for the same item. On the left, they read a stock file. On the right, they ask Inventory Connect and hold before they buy. Change the numbers and see who gets disappointed, and when. Everything is illustrative and calculated in your browser.
orders cancelled after checkout
orders cancelled after checkout
Illustrative model. Arrival and decision times are random, and a quarter of shoppers who pick the item change their mind. Only shoppers who pick the item take a hold, and holds are granted one at a time, as the design's locked update would do. The default of 500 assistants and 10 units mirrors the concurrency test planned for the private beta, which has not been run.
Three screens for the business and one for partner developers. Hover a note to find it on the frame.
AI assistants misread, retry and sometimes follow text they shouldn't. These rules keep the stock count right anyway.
Prices and totals are always calculated on the server. A price supplied by an assistant is never accepted.
Holds are taken in one locked step, so two assistants can never claim the same last unit.
Every write carries a unique key. Sending the same request twice returns the first result instead of a second order.
Orders above a threshold the seller sets need a person to confirm them before they go through.
Catalog text is cleaned before it's returned, and responses never carry instructions an assistant could follow.
A partner, an app or a single tool can be revoked instantly, and every call is logged with personal data removed.
We design inventory connections, MCP servers and AI features for wholesale, retail and multi-channel businesses. We start with the systems you already use.
Product concept. The architecture, tool names and targets come from the design brief, and none has been tested in production. Demo stock levels, arrival times and results are illustrative. Company names are trademarks of their owners and are used for comparison only. CrossDigital Solutions is not affiliated with them.