smallinvoice MCP by usefulapi

MCP server · hosted · v1.1.0 · io.usefulapi/smallinvoice

Online · tested 2h agoNEW · 2h agoNew version 54m agoSeen in the registry 9m ago

Read smallinvoice contacts, invoices, offers, projects and hours; create contacts and invoices.

What it does

smallinvoice MCP by usefulapi is an MCP server, a connector that lets an AI assistant use it as a tool. It is hosted: an assistant connects to it over the internet, nothing to install.

From the publisher's description, Electra Index matched it to one capability: invoicing. That makes it a candidate for tasks such as send and chase invoices.

Facts come from the Official MCP Registry, as declared by the publisher. Capabilities are matched automatically (low confidence). None of this is a test of the tool.

At a glance

Hosted (remote)YES

Local installNO

Live checkOnline · 27 tools

Version1.1.0

PriceNot in the registry

First seen25 Oct 2026

Last checked9m ago

How to connect

As declared in the Official MCP Registry · hosted endpoint tested by Electra Index 2h ago (live check)

Hosted endpoint

https://smallinvoice.usefulapi.io/mcp streamable-http

In Claude Code: claude mcp add --transport http smallinvoice-mcp-by-usefulapi https://smallinvoice.usefulapi.io/mcp

MCP settings (Claude Desktop, Cursor and other MCP clients)

{
  "mcpServers": {
    "smallinvoice-mcp-by-usefulapi": {
      "url": "https://smallinvoice.usefulapi.io/mcp"
    }
  }
}

Live check

Electra Index connected to the hosted endpoint 2h ago

ONLINE smallinvoice MCP by usefulapi answered an MCP connection on 25 Oct 2026 and introduced itself as smallinvoice-mcp 1.0.0 (MCP protocol 2025-06-18).

27 tools offered to AI assistants

smallinvoice_get_owner · The 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_contacts · List 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, total, next_offset (pass it as offset for t
smallinvoice_get_contact · One contact by id, with its fields. Add with=main_address for the main address. Needs the "contact" scope. GET /contacts/{id}.
smallinvoice_list_contact_addresses · All addresses of one contact. Needs the "contact" scope. GET /contacts/{contactId}/addresses.
smallinvoice_list_contact_people · The contact persons of one company contact. Needs the "contact" scope. GET /contacts/{contactId}/people.
smallinvoice_list_contact_groups · List 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_invoices · List 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 as offset for the next page) and the ite
smallinvoice_get_invoice · One invoice by id with its positions, totals and status. Needs the "invoice" scope. GET /receivables/invoices/{id}.
smallinvoice_list_invoice_payments · The payments recorded on one invoice. Needs the "invoice" scope. GET /receivables/invoices/{invoiceId}/payments.
smallinvoice_list_offers · List offers (quotes). Filter by contact_id or a JSON filter. Needs the "offer" scope. GET /receivables/offers. Returns count, total, next_offset (pass it as offset for the next page) and the items.
smallinvoice_get_offer · One offer (quote) by id with its positions and totals. Needs the "offer" scope. GET /receivables/offers/{id}.
smallinvoice_list_order_confirmations · List order confirmations. Filter by contact_id or a JSON filter. Needs the "order_confirmation" scope. GET /receivables/order-confirmations. Returns count, total, next_offset (pass it as offset for the next page) and the items.

Show 15 more

smallinvoice_get_order_confirmation · One order confirmation by id. Needs the "order_confirmation" scope. GET /receivables/order-confirmations/{id}.
smallinvoice_list_delivery_notes · List delivery notes. Filter by contact_id or a JSON filter. Needs the "delivery_note" scope. GET /receivables/delivery-notes. Returns count, total, next_offset (pass it as offset for the next page) and the items.
smallinvoice_get_delivery_note · One delivery note by id. Needs the "delivery_note" scope. GET /receivables/delivery-notes/{id}.
smallinvoice_list_products · List the catalog's products (articles). Needs the "catalog" scope. GET /catalog/products. Returns count, total, next_offset (pass it as offset for the next page) and the items.
smallinvoice_list_services · List the catalog's services. Needs the "catalog" scope. GET /catalog/services. Returns count, total, next_offset (pass it as offset for the next page) and the items.
smallinvoice_list_units · List the units (piece, hour, ...) with their ids, which an invoice position's unit_id refers to. Needs the "configuration" scope. GET /catalog/configuration/units. Returns count, total, next_offset (pass it as offset for the next page) and
smallinvoice_list_bank_accounts · List the account's bank accounts (as printed on documents). Needs the "configuration" scope. GET /configuration/bank-accounts. Returns count, total, next_offset (pass it as offset for the next page) and the items.
smallinvoice_list_projects · List projects. Needs the "project" scope. GET /reporting/projects. Returns count, total, next_offset (pass it as offset for the next page) and the items.
smallinvoice_get_project · One project by id. Needs the "project" scope. GET /reporting/projects/{id}.
smallinvoice_list_working_hours · List recorded working hours (time tracking entries). Needs the "working_hours" scope. GET /reporting/working-hours. Returns count, total, next_offset (pass it as offset for the next page) and the items.
smallinvoice_list_efforts · List efforts (expenses and services recorded against projects). Needs the "effort" scope. GET /reporting/efforts. Returns count, total, next_offset (pass it as offset for the next page) and the items.
smallinvoice_list_activities · List activities (the kinds of work that hours are booked on). Needs the "activity" scope. GET /reporting/activities. Returns count, total, next_offset (pass it as offset for the next page) and the items.
smallinvoice_list_cost_units · List cost units. Needs the "cost_unit" scope. GET /reporting/cost-units. Returns count, total, next_offset (pass it as offset for the next page) and the items.
smallinvoice_create_contact · WRITE: creates a new company contact (customer) in smallinvoice, with its main address. Needs the "contact" scope. POST /contacts. Nothing is sent to anyone. Private persons are not supported here (smallinvoice needs more fields for them):
smallinvoice_create_invoice · WRITE: creates a new invoice for a contact. Needs the "invoice" scope. POST /receivables/invoices. It is only created: it is NOT sent by e-mail or post and its status is not changed; the user reviews it in smallinvoice. Not idempotent: call

What "online" means: the server answered an MCP connection at the time of the check. It is not a guarantee of security, quality or continuous uptime. How we test: we open an MCP session and ask for the tool list, as an AI assistant would. We never run a tool and never send a key. Checked every few days. Method

Is this your server? Monitoring Pro: a check every 30 minutes and an email within the hour when it stops answering. Launch offer: $39.99 once, for life.

Tasks it helps with

Share of each task's required capabilities it covers

Send and chase invoices

Invoicing

50%

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Ready-made AI agents

An MCP server is a connector you add to your own assistant. These are finished products that do the same job for you:

Booke AI51
$129/mo
Xelix32
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Apollo.io90
$49/mo · free plan

Facts & evidence

Each fact shows where it was seen and when.

Fact	Value	Evidence	Source	Last confirmed
Version	1.1.0	DECLARED	SRC-001 Official MCP Registry	9m ago
Hosted endpoint	https://smallinvoice.usefulapi.io/mcp	DECLARED	SRC-001 Official MCP Registry	9m ago
Local install (package)	no	DECLARED	SRC-001 Official MCP Registry	9m ago
Remote access (hosted)	yes	DECLARED	SRC-001 Official MCP Registry	9m ago
Website	https://usefulapi.io/smallinvoice/	DECLARED	SRC-001 Official MCP Registry	9m ago
Repository	https://github.com/m190/usefulapi-mcp	DECLARED	SRC-001 Official MCP Registry	9m ago
Registry status	active	DECLARED	SRC-001 Official MCP Registry	9m ago
MCP server	yes	DECLARED	SRC-001 Official MCP Registry	9m ago

Change history

VERSION25 Oct 2026
1.0.0 → 1.1.0
NEW25 Oct 2026
first seen in the index

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Questions about smallinvoice MCP by usefulapi

How do I connect smallinvoice MCP by usefulapi?

Use the hosted endpoint https://smallinvoice.usefulapi.io/mcp in your assistant's MCP settings. The exact settings are in "How to connect" above, as declared in the Official MCP Registry.

What tools does smallinvoice MCP by usefulapi offer?

When Electra Index connected on 25 Oct 2026, it listed 27 tools: smallinvoice_get_owner, smallinvoice_list_contacts, smallinvoice_get_contact, smallinvoice_list_contact_addresses, smallinvoice_list_contact_people, smallinvoice_list_contact_groups, smallinvoice_list_invoices, smallinvoice_get_invoice and more. The full list is in "Live check" above.

Is smallinvoice MCP by usefulapi online?

Yes. Its hosted endpoint answered an MCP connection from Electra Index 2h ago.

What can I use smallinvoice MCP by usefulapi for?

Based on its description, it is most relevant to: send and chase invoices.