usefulapiInventory Planner MCP server
Read Inventory Planner forecasts, replenishment and purchase orders; create draft purchase orders. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.
What can I ask?
Turn on the Inventory Planner connector, then ask in plain words. The AI picks the tools.
- Which products are about to run out of stock soon?
- Show my open purchase orders and their expected dates.
- Which suppliers can I order the variant SKU TSHIRT-M from?
- Show the suppliers and ordering terms for the variant with SKU TSHIRT-M.
What you can do with Inventory Planner in Claude and ChatGPT
For ecommerce merchants who plan stock and reorders with Inventory Planner.
Find products that are about to run out of stock
The AI lists variants with chosen metrics, such as days to sell out, forecasted lost revenue and recommended order quantity, sorted so you see which SKUs need reordering.
Check which vendors a SKU can be ordered from
The AI lists the vendors of a variant with cost price, landing cost, vendor SKU and minimum order quantity (MOQ), and opens one vendor's terms.
Review open purchase orders and expected dates
The AI lists purchase orders, transfers and assembly orders filtered by status, vendor or expected date, with totals ordered and received.
Read the line items of a purchase order
The AI lists a purchase order's line items with ordered and received quantities, cost price, tax and discount, and whether it was saved to connected systems.
Create a draft purchase order and edit it
The AI creates a draft purchase order from variants and quantities, and edits its reference, expected date or notes. A draft is not sent to the vendor.
Changes dataHow do I connect Inventory Planner?
Before you connect
The login page asks for your Account id and Inventory Planner API key.
In Inventory Planner open Account → Settings → API and click Generate key (the key works only for a user with full access to the account); the account id is shown on the same page. Your key is used only to call the Inventory Planner API on your behalf; it is never shown to anyone. This server can create draft purchase orders but never sends an order to a vendor.
Claude claude.ai · Desktop
- Open Customize → Connectors, then click + Add → Add custom connector.
- Enter the name Inventory Planner and this URL, then click Add:https://
inventory-planner. usefulapi. io/ mcp - Claude opens the login page: enter your Account id and Inventory Planner API key.
- In a chat, click + → Connectors and turn on Inventory Planner.
Team and Enterprise: an Owner adds the connector for the organization first.
ChatGPT chatgpt.com
- Open Plugins, click +, then Add custom MCP server.
- Enter the name Inventory Planner and this URL, choose OAuth as the authentication, confirm the warning and create it:https://
inventory-planner. usefulapi. io/ mcp - ChatGPT opens the login page: enter your Account id and Inventory Planner API key.
- In Plugins, install Inventory Planner, then choose it in a chat.
No Add custom MCP server option? It depends on your account or workspace settings: see OpenAI's guide.
Claude Code
Run this command, then run /mcp in Claude Code to log in:
Cursor
Add to Cursor or add this to ~/.cursor/mcp.json:
{
"mcpServers": {
"inventory-planner": {
"url": "https://inventory-planner.usefulapi.io/mcp"
}
}
} VS Code
Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"inventory-planner": {
"type": "http",
"url": "https://inventory-planner.usefulapi.io/mcp"
}
}
} Codex
Run these commands. The second one opens the login page:
Other clients
Windsurf, Cline, Zed and other MCP clients: add this URL as a remote MCP server (Streamable HTTP). The client then opens the login page in your browser.
Add only the URL. Do not add an Authorization header or an API key to the client config. The server signs you in with OAuth: the login page asks for your Account id and Inventory Planner API key. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.
Pricing
| Plan | Price | Limit |
|---|---|---|
| Free | $0 | 50 tool calls / month |
| Proper account | $9/mo · $90/yr | 10,000 tool calls / month |
| Pro+per account | $39/mo · $390/yr | 100,000 tool calls / month |
Each paid plan covers this Inventory Planner server only. Ask your AI to run inventoryplanner_upgrade and choose Pro or Pro+, billed monthly or yearly (it returns a Stripe Checkout link). If you already have Pro, ask to change it to Pro+. The change requires your confirmation, keeps your billing interval and charges the price difference for the rest of the period immediately. Cancel any time with inventoryplanner_cancel_subscription: your paid plan continues to the end of the paid period, with no refund for the current period, and asking to resume the same plan with inventoryplanner_upgrade before then undoes the cancel. Or write to support@usefulapi.io.
Tools 15
Show all 15 tools (the AI picks them for you)
Read only · 9
- List variants (forecast and replenishment)
inventoryplanner_list_variantsList product variants with Inventory Planner's computed metrics (forecast, replenishment, days to sell out, lost revenue, lead time, review period and ~200 more). Always pass `fields` to pick the metrics you need (default: id,sku,lead_time,review_period,replenishment,oos,under_value; oos = forecasted days to sell out, under_value = forecasted lost revenue, replenishment = recommended order quantity). Use `filters` and `sort` for questions like "which SKUs need reordering". Removed variants are excluded unless include_removed. - Get variant
inventoryplanner_get_variantOne variant by its Inventory Planner id, with the metrics named in `fields` (default: id,sku,lead_time,review_period,replenishment,oos,under_value). - List a variant's vendors
inventoryplanner_list_variant_vendorsThe vendors a variant can be ordered from, with cost_price, landing_cost_price, vendor_reference (vendor SKU), vendor_name, vendor_packaging (MOQ) and uom_ordering. - Get a variant's vendor terms
inventoryplanner_get_variant_vendorOne vendor's terms for a variant: cost_price, landing_cost_price, vendor_reference, vendor_name, vendor_packaging (MOQ), uom_ordering. vendor_id is the vendor name in lowercase. - List purchase orders (and transfers, assembly orders)
inventoryplanner_list_purchase_ordersList stock orders: purchase orders, transfers and assembly orders (the `type` field is "po"/empty, "transfer" or "assembly"). Filter with `filters`, e.g. {"status": "OPEN", "vendor": "Acme", "expected_date_lt": "2026-11-01"}. Default fields: id,reference,status,type,vendor,warehouse,source,created_date,expected_date,received_date,currency,total,total_ordered,total_received. - Get purchase order
inventoryplanner_get_purchase_orderOne purchase order, transfer or assembly order by id, with its header fields (reference, status, vendor, warehouse, dates, addresses, totals, notes) and line items. - List purchase order line items
inventoryplanner_list_purchase_order_itemsThe line items of a purchase order: variant id, sku, title, ordered quantity (replenishment), received quantity and received_history, cost price, tax, discount and stock snapshots. - Get purchase order connection status
inventoryplanner_get_purchase_order_connectionsWhether and how a purchase order was saved to connected systems (ERP, accounting): per connection the status (success, error, run, queued), save_po flag and the PO's id and reference there. Read-only. - Get purchase order stock update (preview)
inventoryplanner_get_purchase_order_stock_updateThe stock updates a purchase order has computed: per warehouse (wh) the items with stock_before, delta and error. for_destination false reads the source warehouse of a transfer. Read-only: nothing is pushed.
Changes data · 2
- Create a draft purchase order
inventoryplanner_create_draft_purchase_orderWRITE: create a purchase order with status "draft" in Inventory Planner (POST /api/v1/purchase-orders). A draft is only a plan inside Inventory Planner: it is NOT sent to the vendor, NOT saved to any connected system and moves no stock or money. Purchase orders only (no transfers or assembly orders). Each line item is a variant id plus the quantity to order (replenishment). - Edit a draft purchase order
inventoryplanner_update_draft_purchase_orderWRITE: change the reference, expected date or notes of a purchase order that is still a draft (PATCH /api/v1/purchase-orders/{id}). The order is read first and refused unless its status is "draft". It never changes the status, sends the order, or touches line items or received quantities.
Your usefulapi plan · 4
- Usage status (free-tier meter)
inventoryplanner_usage_statusReport the caller's current usage: the plan, calls used this month, the limit of the plan (the free monthly cap or the Pro fair use limit), remaining, and whether the limit is reached. Read-only; does not count against the meter. - Request a missing feature
inventoryplanner_request_featureTell usefulapi that the user needs something the Inventory Planner tools cannot do yet (a missing tool, field or filter). Call it only when the user asks for something none of the tools can do, and tell the user that you send the request. Do not call it for errors or for normal requests. Do not include personal data, credentials or customer records. Stored with the product name and the client type (for example Claude or Cursor), without the user's account. At most 5 requests per day. Does not count against the meter. - Upgrade to Pro or Pro+
inventoryplanner_upgradeGet a paid plan for Inventory Planner (the free tier caps monthly usage). Pro: 10,000 tool calls a month, for normal use — plan "monthly" ($9/month) or "yearly" ($90/year, 2 months free). Pro+: 100,000 tool calls a month, for automations and heavy use — plan "plus" ($39/month) or "plus_yearly" ($390/year). Without a plan it returns both Pro and Pro+, each with a payment link, for the user to choose; with a plan, one link. An existing Pro subscription changes to Pro+ in place: call without confirm first, as the reply states the exact charge for this account (the price difference for the rest of the period, or in a free Pro trial the full Pro+ price, as the trial ends); then call with confirm: true. Cancel any time: the plan then runs to the end of the paid period, so it also suits a one-time job. A link opens Stripe Checkout in the browser; after payment the account upgrades automatically. Does not count against the meter. - Cancel the Pro subscription
inventoryplanner_cancel_subscriptionCancel the caller's Inventory Planner Pro subscription at the end of the paid period (no refund for the current period; Pro continues until then, then the free tier applies). Requires confirm: true. Run inventoryplanner_upgrade later to undo the cancel before the period ends. Does not count against the meter.
FAQ
What can I do with Inventory Planner in Claude or ChatGPT?
Find products that are about to run out of stock. Check which vendors a SKU can be ordered from. Review open purchase orders and expected dates. Read the line items of a purchase order. Create a draft purchase order and edit it. See what you can do for the details.
Is this an official Inventory Planner product?
No. usefulapi is an independent service. It is not affiliated with or endorsed by Inventory Planner. The server calls the Inventory Planner API with your own Inventory Planner access, so it sees only the data that your account can see.
Can I connect Inventory Planner to Claude or ChatGPT?
Yes. In Claude, add this server's URL as a custom connector. In ChatGPT, add it as a custom MCP server in Plugins. Then log in once. Cursor, VS Code, Claude Code and Codex work too. See the setup steps.
What do I need to connect?
The login page asks for your Account id and Inventory Planner API key. See Before you connect for where to find them.
Do I put my Inventory Planner key or an Authorization header in the client config?
No. Add only the URL. Do not add an Authorization header or an API key to the client config. The server signs you in with OAuth: the login page asks for your Account id and Inventory Planner API key. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.
How do you keep my Inventory Planner credentials?
The login stores them encrypted in the authorization grant of your connection. The server uses them to call the Inventory Planner API for you and to derive a private account id for usage metering. usefulapi does not show them on any page or in any reply. To stop all access, remove the connector and change or delete these credentials in Inventory Planner.
Can the AI change my Inventory Planner data?
Yes, if you approve it. 2 of the 11 Inventory Planner tools can create or change data. The other 9 are marked read-only. Most MCP clients ask you to approve a tool call before it runs.
What does it cost?
The Free plan gives 50 tool calls / month. Pro costs $9/mo or $90/yr, with 10,000 tool calls / month. Pro+ costs $39/mo or $390/yr, with 100,000 tool calls / month. Each subscription covers this Inventory Planner server only. Cancel any time: your paid plan then runs to the end of the paid period. Run inventoryplanner_usage_status to see how many calls you used.
How do I subscribe or cancel?
Ask the AI to run inventoryplanner_upgrade and choose Pro or Pro+, billed monthly or yearly: it returns a Stripe Checkout link. If you already have Pro, ask to change it to Pro+. After you confirm, your existing subscription changes in place, keeps its billing interval and charges the price difference for the rest of the period immediately. To cancel, run inventoryplanner_cancel_subscription. Your paid plan continues to the end of the paid period.
What if a Inventory Planner tool that I need is missing?
Tell the AI what you wanted to do. It can send the request with inventoryplanner_request_feature. We store the text with the server name, the type of AI client and the tool you tried, not with your account, and read every request when we plan new tools. You can send up to 5 requests per day.
Which AI clients can I use?
Any client that supports remote MCP servers (Streamable HTTP) with OAuth login: Claude (web and desktop), Claude Code, ChatGPT, Codex, Cursor, VS Code, Windsurf and others.
This is a Model Context Protocol endpoint — meant to be connected from an AI client, not opened in a browser. An invalid_token response at the URL is the auth gate working as designed; clients authenticate automatically.
Need a tool this server does not have, or a connection to another system? We build custom integrations and MCP servers.