smallinvoice MCP by usefulapi
by FastDrop
Read smallinvoice contacts, invoices, offers, projects and hours; create contacts and invoices.
Read smallinvoice contacts, invoices, offers, projects and hours; create contacts and invoices. Official MCP Registry: io.usefulapi/smallinvoice@1.0.0. Remote endpoint: https://smallinvoice.usefulapi.io/mcp
Problem it solves
Discoverable MCP server listed in the official MCP Registry.
How it's different
Remote MCP endpoint ingested from the official registry and probed by FastDrop.
Ingested from the official MCP Registry
FastDrop pulled this entry from the official MCP Registry as io.usefulapi/smallinvoice and probed the endpoint. The maker did not submit it, so the outbound link is not endorsed
and the description is not theirs.
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Read directly from the endpoint on 25 Oct 2026. Not supplied by the maker.
smallinvoice_get_ownerThe smallinvoice account the API client belongs to (the owner's id and details). A cheap check that the connection works. GET /auth/owner.
smallinvoice_list_contactsList contacts (customers and suppliers): name, type (company or person), relation, e-mail, currency. Add with=main_address for the address. Needs the "contact" scope. GET /contacts. Returns count, tot
smallinvoice_get_contactOne contact by id, with its fields. Add with=main_address for the main address. Needs the "contact" scope. GET /contacts/{id}.
smallinvoice_list_contact_addressesAll addresses of one contact. Needs the "contact" scope. GET /contacts/{contactId}/addresses.
smallinvoice_list_contact_peopleThe contact persons of one company contact. Needs the "contact" scope. GET /contacts/{contactId}/people.
smallinvoice_list_contact_groupsList the contact groups. Needs the "contact" scope. GET /contacts/configuration/groups. Returns count, total, next_offset (pass it as offset for the next page) and the items.
smallinvoice_list_invoicesList invoices: number, contact, dates, total, currency, status. Filter by contact_id or a JSON filter. Needs the "invoice" scope. GET /receivables/invoices. Returns count, total, next_offset (pass it
smallinvoice_get_invoiceOne invoice by id with its positions, totals and status. Needs the "invoice" scope. GET /receivables/invoices/{id}.
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