usefulapiMegaventory MCP server
Read Megaventory products, stock, orders and partners; create clients, sales and purchase orders. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.
What can I ask?
Turn on the Megaventory connector, then ask in plain words. The AI picks the tools.
- How much stock do we have of each product in the main warehouse?
- Which sales orders are still pending this month?
- Which purchase orders have we placed with our suppliers recently?
- Create a new client record for Acme Ltd with email buyer@acme.com.
What you can do with Megaventory in Claude and ChatGPT
For small businesses that manage inventory, orders and suppliers in Megaventory.
Check stock levels by inventory location
The AI reads physical stock, on hand, on hold, not yet shipped and not yet received per product and location, with the alert level.
Review sales orders and quotes by status
The AI lists sales orders and sales quotes with client, totals, status and rows, filtered by number or status. You see what is still pending.
Review purchase orders to your suppliers
The AI lists purchase orders with supplier, totals, status and the quantity received and invoiced per row, filtered by number, status or supplier.
Review product materials, supplier prices, bundles
The AI reads the bill of materials of a manufactured product, the purchase price of each supplier and the bundles that include the product.
Check work orders in production
The AI lists work orders with finished product, quantity, location, status, priority and the materials allocated.
Add a client or supplier, or draft an order
The AI creates a new client or supplier, or a sales or purchase order in pending status. A pending order is a draft: nothing is shipped, invoiced or paid.
Changes dataHow do I connect Megaventory?
Before you connect
The login page asks for your Megaventory API key.
Find it in Megaventory: click your profile icon → My Profile, then the key icon to generate a key, and choose Update. The API is part of the paid Megaventory plans. The key acts with that user's permissions (a dedicated user makes its activity easy to track). It is used only to call the Megaventory API on your behalf, sent in the request body, and never shown to anyone.
Claude claude.ai · Desktop
- Open Customize → Connectors, then click + Add → Add custom connector.
- Enter the name Megaventory and this URL, then click Add:https://
megaventory. usefulapi. io/ mcp - Claude opens the login page: enter your Megaventory API key.
- In a chat, click + → Connectors and turn on Megaventory.
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 Megaventory and this URL, choose OAuth as the authentication, confirm the warning and create it:https://
megaventory. usefulapi. io/ mcp - ChatGPT opens the login page: enter your Megaventory API key.
- In Plugins, install Megaventory, 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": {
"megaventory": {
"url": "https://megaventory.usefulapi.io/mcp"
}
}
} VS Code
Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"megaventory": {
"type": "http",
"url": "https://megaventory.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 Megaventory 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 user | $9/mo · $90/yr | 10,000 tool calls / month |
| Pro+per user | $39/mo · $390/yr | 100,000 tool calls / month |
Each paid plan covers this Megaventory server only. Ask your AI to run megaventory_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 megaventory_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 megaventory_upgrade before then undoes the cancel. Or write to support@usefulapi.io.
Tools 24
Show all 24 tools (the AI picks them for you)
Read only · 17
- Get current user
megaventory_get_current_userThe Megaventory user this API key belongs to (user name and whether they are an administrator). The key itself and the mobile PIN are never returned. - List products
megaventory_list_productsSearch the product catalog: SKU, description, category, prices (selling, purchase, unit cost), dimensions, main supplier, sellable/purchasable flags and more. Filter by id, exact SKU, category, main supplier or words in the description. Empty text fields are omitted. - List product categories
megaventory_list_product_categoriesList product categories (id, name, description). Use the ids to filter products. - Get product bill of materials
megaventory_get_product_bomThe bill of materials (BOM) of a manufactured product: its raw materials (id, SKU, description, quantity per unit). - List product bundles
megaventory_list_product_bundlesList product bundles (a bundle sells several products together). Filter by bundle id or SKU, or by a product the bundle includes. - Get stock levels
megaventory_get_stockStock per product per inventory location: physical stock, on hand, on hold, not yet shipped (open sales orders), not yet received (open purchase orders / work orders) and the alert level. Filter by product ids, SKU, category, location or supplier, or show only products below their alert level. - List inventory locations
megaventory_list_inventory_locationsList inventory locations (warehouses, shops, transit): id, abbreviation, name, address. Use the ids for stock filters and order locations. - List clients and suppliers
megaventory_list_clients_suppliersList clients and suppliers (one record type in Megaventory): id, type, name, addresses, phone, email, tax id, currency, payment terms and contacts. Filter by type or words in the name. - List product supplier prices
megaventory_list_product_suppliersWhich suppliers sell which products: supplier SKU, description and purchase price per product-supplier pair. - List sales orders
megaventory_list_sales_ordersList sales orders with client, dates, totals (subtotal, tax, discount, grand total), status and the order rows (SKU, quantity, shipped/invoiced quantity, unit price). Filter by order number or status. - List purchase orders
megaventory_list_purchase_ordersList purchase orders with supplier, dates, totals, status and the order rows (SKU, quantity, received/invoiced quantity, unit price). Filter by order number, status or supplier. - List sales quotes
megaventory_list_sales_quotesList sales quotes with client, totals, status and rows. Filter by quote number or status. - List work orders
megaventory_list_work_ordersList work (production) orders: finished product, quantity, location, status, priority and the materials allocated. Filter by work order number or status. - List documents
megaventory_list_documentsList transaction documents of any type: shipments, invoices, receipts, credit notes, returns, adjustments and so on, with totals and status. Narrow by document type ids (megaventory_list_document_types), document number or status. - List document types
megaventory_list_document_typesList the document types of the account (sales order, purchase order, shipment, invoice and so on) with their ids and abbreviations. - List taxes
megaventory_list_taxesList the tax rates defined in the account (id, name, rate). - List currencies
megaventory_list_currenciesList the currencies of the account (code, description, exchange rate to the default currency, default flag).
Changes data · 3
- Create client or supplier
megaventory_create_client_or_supplierWRITE: create a NEW client, supplier or both in Megaventory (Insert only: an existing record is never updated, nothing is deleted). Creating the same name twice creates two records, so search with megaventory_list_clients_suppliers first. - Create pending sales order
megaventory_create_sales_orderWRITE: create a NEW sales order for an existing client in the PENDING status. A pending order is only a draft document: it is not verified, nothing is shipped, invoiced or paid, and stock is not touched. Verifying, shipping and invoicing happen in Megaventory, not through this server. - Create pending purchase order
megaventory_create_purchase_orderWRITE: create a NEW purchase order to an existing supplier in the PENDING status. A pending order is only a draft document: it is not verified or sent, nothing is received, invoiced or paid, and stock is not touched. Verifying and receiving happen in Megaventory, not through this server.
Your usefulapi plan · 4
- Usage status (free-tier meter)
megaventory_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
megaventory_request_featureTell usefulapi that the user needs something the Megaventory 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+
megaventory_upgradeGet a paid plan for Megaventory (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
megaventory_cancel_subscriptionCancel the caller's Megaventory 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 megaventory_upgrade later to undo the cancel before the period ends. Does not count against the meter.
FAQ
What can I do with Megaventory in Claude or ChatGPT?
Check stock levels by inventory location. Review sales orders and quotes by status. Review purchase orders to your suppliers. Review product materials, supplier prices, bundles. Check work orders in production. Add a client or supplier, or draft an order. See what you can do for the details.
Is this an official Megaventory product?
No. usefulapi is an independent service. It is not affiliated with or endorsed by Megaventory. The server calls the Megaventory API with your own Megaventory access, so it sees only the data that your account can see.
Can I connect Megaventory 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 Megaventory API key. See Before you connect for where to find it.
Do I put my Megaventory 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 Megaventory 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 Megaventory credentials?
The login stores them encrypted in the authorization grant of your connection. The server uses them to call the Megaventory 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 Megaventory.
Can the AI change my Megaventory data?
Yes, if you approve it. 3 of the 20 Megaventory tools can create or change data. The other 17 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 Megaventory server only. Cancel any time: your paid plan then runs to the end of the paid period. Run megaventory_usage_status to see how many calls you used.
How do I subscribe or cancel?
Ask the AI to run megaventory_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 megaventory_cancel_subscription. Your paid plan continues to the end of the paid period.
What if a Megaventory tool that I need is missing?
Tell the AI what you wanted to do. It can send the request with megaventory_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.