Sellasist MCP
Manage orders, inventory, customers and invoices across your Sellasist sales channels.
Connect to Sellasist order management system to read and manage orders, products, stock levels, customers, invoices and returns. Add order notes and update order status across Allegro, eBay, Amazon and other marketplaces.
Try asking Muse: "Show me all orders from today that are pending payment and add a note to follow up with the customer."
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Source: Found in the official MCP Registry (io.usefulapi/sellasist) · First listed October 30, 2026
Last 24 hours
Each bar is one check, every 15 minutes. Green means it answered. Last checked 2 h ago.
Is it safe to connect?
What Muse can see: It does not ask you to sign in, so it cannot see your accounts. It only sees what Muse sends it from your request.
Before it acts: Read what Muse plans to do before you approve it, and remove the app from Muse when you stop using it.
musedirectory.ai is not part of Meta. More about how Muse handles your information
How to add it to Muse
Not in Muse's Connectors list yet, but Muse can still use it. Copy the request below and paste it into Muse. Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
https://sellasist.usefulapi.io/mcpNot in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
Also use it in ChatGPT or Claude
Sellasist MCP is a remote MCP server, so any assistant that can add a custom connector by link can use it. Same link, same tools.
Add it to ChatGPT
- 1
Open ChatGPT settings
In ChatGPT, open Settings, then Connectors (called Apps & Connectors on some accounts).
- 2
Turn on developer mode
Under Advanced settings, switch on Developer mode. That is what lets you add a connector by link.
- 3
Create the connector
Choose Create, give it a name, paste the link as the MCP server URL, and save. If it needs a sign-in, ChatGPT asks for it here.
- 4
Use it in a chat
Start a chat, open the tools menu, pick the connector, and ask. ChatGPT asks before it runs a tool the first time.
Custom connectors need a paid ChatGPT plan, and on Team, Enterprise and Edu accounts only an admin can add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in ChatGPT
Add it to Claude
- 1
Open Claude settings
In Claude, open Settings, then Connectors.
- 2
Add a custom connector
Choose Add custom connector, give it a name, and paste the link.
- 3
Connect and use it
If it needs a sign-in, Claude sends you to it. Then turn the connector on in a chat from the tools menu and ask.
Custom connectors are available on paid Claude plans; on Team and Enterprise accounts an admin may need to add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in Claude
https://sellasist.usefulapi.io/mcpWhat people ask Muse to do
Technical details: safety screening, tools, response time and recent checks
Response time at the last check: 58ms. Worked in n/a of checks over 30 days.
Screening · October 30, 2026
Screened, no issues found
Screening looks for known threats and hidden instructions at the time of the check, and runs again weekly and whenever the tool list changes. It cannot see the server's code, so only connect what you need and review what Muse asks to do. How screening works.
Tools · 27
sellasist_list_ordersList orders, newest first, with status, buyer billing address, payment, total, source (Allegro, eBay, Amazon, shop...) and comment. Filter by status, email, name, external id, payment, source or date. Use sellasist_get_order for line items and shipments. GET /orders.sellasist_get_orderOne order by id: status, buyer and delivery address, payment, shipment method, line items (product ids, EAN, quantities, prices), notes, waybills with tracking numbers, payments and additional fields. GET /orders/{order_id}.sellasist_search_ordersFind up to 100 orders created in a date range and/or in one status (id, date, status). Read-only: it uses POST only because the criteria go in the body. POST /orders_search.sellasist_list_order_statusesThe order statuses configured in the account. Use the ids to filter orders or to change a status. GET /statuses.sellasist_list_order_notesNotes written on one order (author id, date, text, visibility). GET /notes/{order_id}.sellasist_list_order_logsThe audit log of order actions (create, edit, status change, delete, merge, invoice and receipt actions) with date and user id. Filter by order ids, action type or date. GET /orders_logs.sellasist_list_waybillsWaybills (shipping labels) with order id, tracking number, creation and delivery date. Filter by order or date. Label files are not returned inline. GET /ordersshipments.sellasist_list_productsList products with id, name, EAN, symbol, catalog number, location, price, promo price, stock quantity, reserved quantity and variants. Filter by category, manufacturer, EAN, symbol or catalog number. GET /products.sellasist_get_productOne product by id: title, category, prices, VAT, stock, sold counts, EAN, symbol, location, weight, qualities, availability, manufacturer and more. GET /products/{product_id}.sellasist_get_stockStock quantity of one product, found by id, EAN, symbol or catalog number (the first one given in that order counts); with none of them, a page of stock levels for all products. GET /products_stock.sellasist_list_bestsellersProducts ranked by units sold in the last month (sold_last_month), with stock and price. GET /products_bestsellers.sellasist_list_categoriesProduct categories. GET /categories.sellasist_get_categoryOne category: names per language, parent category and status. GET /categories/{category_id}.sellasist_list_warehousesWarehouses (id, title). Needs the warehouse-management feature, otherwise Sellasist answers HTTP 406. GET /storages.sellasist_list_customersRegistered customers (the account's buyers). GET /users.sellasist_get_customerOne customer: email, registration date, billing and delivery address. GET /users/{user_id}.sellasist_list_invoicesInvoices (id, number, date). Filter by order, document series or issue date. GET /invoices.sellasist_get_invoiceOne invoice: number, dates, seller, buyer, currency, line items (net, gross, VAT), total and paid amount. GET /invoices/{invoice_id}.sellasist_list_returnsReturn documents (RMZ): number, status, source, linked order, refund value and tracking number. Filter by date, order, status, source or return number. GET /returns.sellasist_get_returnOne return document with status, refund and payment details, tracking, courier and the returned items. GET /returns/{id}.sellasist_list_payment_methodsPayment methods (id, title) for filtering orders. GET /payments.sellasist_list_shipment_methodsDelivery methods (id, title) for filtering orders. GET /shipments.sellasist_list_order_sourcesOrder sources available in the account (id, name, type: Allegro, shop, marketplace...). GET /sources.sellasist_list_integration_accountsAccounts connected in external services (id, login, type). Only these three fields are returned. GET /external_accounts.sellasist_list_alertsActive alerts and system messages shown on the Sellasist dashboard (type, severity, title, message). GET /alerts.sellasist_add_order_noteWRITE: add a new note to an order. Notes are visible to the account's staff; each call adds another note (nothing is overwritten). POST /notes.sellasist_update_order_statusWRITE: change the status of one order (PUT /orders/{order_id} with only the status). Sellasist may run the status's automations (emails, stock moves). By default the new status is NOT pushed to the marketplace; set send_status_to_external to true to push it. Find status ids with Link
https://sellasist.usefulapi.io/mcpQuestions about Sellasist MCP in Muse
How do I connect Sellasist MCP to Muse?
Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Sellasist MCP to help me. It is a free service with an MCP server at https://sellasist.usefulapi.io/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
Is Sellasist MCP working right now?
At the last check (October 30, 2026, 00:51 UTC) the endpoint was working, answering in 58ms. It is checked every 15 minutes.
Is Sellasist MCP safe to connect to Muse?
It was screened on October 30, 2026 with the result "screened, no issues found". Screening checks the domain against threat feeds and reads the tools for hidden instructions and requests for passwords or card numbers. It cannot see the server's code, so grant only the access you need.
What can Sellasist MCP do in Muse?
It exposes 27 tools, including sellasist_list_orders, sellasist_get_order, sellasist_search_orders, sellasist_list_order_statuses. For example, you could ask Muse: "Show me all orders from today that are pending payment and add a note to follow up with the customer."
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