Billomat
Read and create invoices, offers, credit notes and client records in your Billomat account
Connects to Billomat invoicing software. Read clients, invoices, offers, credit notes, reminders and incoming invoices. Create new clients and draft invoices and offers for review before sending.
Try asking Muse: "Show me all unpaid invoices from the last 30 days and create a draft invoice for my top client."
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Source: Found in the official MCP Registry (io.usefulapi/billomat) · First listed October 28, 2026
Last 24 hours
Each bar is one check, every 15 minutes. Green means it answered. Last checked 39 min 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://billomat.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
Billomat 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://billomat.usefulapi.io/mcpWhat people ask Muse to do
Technical details: safety screening, tools, response time and recent checks
Response time at the last check: 1054ms. Worked in 100% of checks over 30 days.
Screening · October 29, 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 · 34
billomat_get_current_userShow the Billomat user the API key belongs to (name, email, role and rights). Use it to check which rights the key has.billomat_get_companyShow the own company data of the Billomat account (name, address, bank details, tax numbers, currency).billomat_list_clientsList the clients (customers) of the account, filtered by name, number, email, contact person, country, note or tags. Paged.billomat_get_clientGet one client with address, contact person, bank details, payment terms and revenue.billomat_list_articlesList the articles (products and services) with prices, units and tax. Paged.billomat_get_articleGet one article with its prices, unit, tax and supplier.billomat_list_suppliersList the suppliers of the account, filtered by name, email, contact person, country, note or tags. Paged.billomat_get_supplierGet one supplier with address and bank details.billomat_list_invoicesList invoices (Rechnungen), filtered by client, status (DRAFT, OPEN, PAID, OVERDUE, CANCELED), number, date range, text or tags. Paged; each invoice carries totals and the open amount.billomat_invoice_totalsInvoice totals grouped by client, status, day, week, month or year (for example group_by=client,year). Takes the same filters as billomat_list_invoices. Read-only.billomat_get_invoiceGet one invoice (status, totals, dates, client, payment terms). Its line items come from billomat_list_invoice_items.billomat_list_invoice_itemsList the line items (positions) of one invoice.billomat_list_invoice_paymentsList the payments that were recorded on invoices (read-only), optionally for one invoice, a date range or payment types.billomat_list_recurring_invoicesList recurring invoices (Abo-Rechnungen): name, cycle (DAILY, WEEKLY, MONTHLY, YEARLY), client and next run. Paged.billomat_list_offersList offers (Angebote), filtered by client, status (DRAFT, OPEN, WON, LOST, CANCELED, CLEARED), number, date range or text. Paged.billomat_get_offerGet one offer (status, totals, validity, client).billomat_list_confirmationsList order confirmations (Auftragsbestaetigungen), filtered by client, status (DRAFT, COMPLETED, CANCELED, CLEARED), number, date range or text. Paged.billomat_get_confirmationGet one order confirmation.billomat_list_delivery_notesList delivery notes (Lieferscheine), filtered by client, status (DRAFT, CREATED), number, date range or text. Paged.billomat_get_delivery_noteGet one delivery note.billomat_list_credit_notesList credit notes (Gutschriften), filtered by client, status (DRAFT, OPEN, PAID), date range or text. Paged.billomat_get_credit_noteGet one credit note.billomat_list_remindersList payment reminders (Mahnungen), filtered by client, status (DRAFT, OPEN, OVERDUE, PAID, CANCELED), invoice number, date range or text. Paged.billomat_get_reminderGet one payment reminder.billomat_list_incoming_invoicesList incoming invoices (Eingangsrechnungen, from suppliers), filtered by supplier, status (OPEN, PAID, OVERDUE), number, date range, note or tags. Paged.billomat_get_incoming_invoiceGet one incoming invoice with amounts and open amount.billomat_list_taxesList the tax rates (Steuersaetze) of the account, with the default one.billomat_list_unitsList the units (Einheiten) used for article and item quantities, optionally filtered by name.billomat_create_clientWRITE: create a new client (customer) in Billomat. Billomat assigns the client number. Nothing is sent to the client. Check billomat_list_clients first to avoid duplicates.billomat_update_clientWRITE: change fields of an existing client (only the fields you pass are changed; everything else stays). Read the client first with billomat_get_client. Nothing is sent to the client.billomat_create_articleWRITE: create a new article (product or service) with a price. Billomat assigns the article number.billomat_create_draft_invoiceWRITE: create an invoice as a DRAFT (Entwurf) for a client, with optional line items. The invoice is NOT completed, has no number yet and is NOT sent; review and complete it in Billomat. Nothing is charged.billomat_add_invoice_itemWRITE: add one line item to an invoice that is still a DRAFT (Billomat refuses it for any other status). Does not complete or send the invoice.billomat_create_draft_offerWRITE: create an offer (Angebot) as a DRAFT for a client, with optional line items. The offer is NOT completed, has no number yet and is NOT sent; review and complete it in Billomat.Recent checks
Link
https://billomat.usefulapi.io/mcpQuestions about Billomat in Muse
How do I connect Billomat to Muse?
Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Billomat to help me. It is a free service with an MCP server at https://billomat.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 Billomat working right now?
At the last check (October 29, 2026, 11:16 UTC) the endpoint was working, answering in 1054ms. Over the last 7 days it answered 100% of health checks. It is checked every 15 minutes.
Is Billomat safe to connect to Muse?
It was screened on October 29, 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 Billomat do in Muse?
It exposes 34 tools, including billomat_get_current_user, billomat_get_company, billomat_list_clients, billomat_get_client. For example, you could ask Muse: "Show me all unpaid invoices from the last 30 days and create a draft invoice for my top client."
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