smallinvoice MCP by usefulapi

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

• Connection: Runs in the cloud
• Transport: Streamable HTTP
• Category: Other

Install

Pick the AI app you use, then copy the settings.

You need

• Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

https://smallinvoice.usefulapi.io/mcp

claude mcp add --transport http smallinvoice https://smallinvoice.usefulapi.io/mcp

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

{
  "servers": {
    "smallinvoice": {
      "type": "http",
      "url": "https://smallinvoice.usefulapi.io/mcp"
    }
  }
}

https://smallinvoice.usefulapi.io/mcp

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These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Tool names and descriptions exactly as the server reported them on Nov 6, 2026. The maker wrote them, not us; we show them as plain text.

• 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 the next page) and the items.

• 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 items.

• 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.

• 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 the items.

• 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): create those in smallinvoice. Check smal

• 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: calling it twice creates two invoices. Use s

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026

• ✓ Pass

  Maker matches the repo

  The registry name was verified against the domain usefulapi.io (the registry checks domain ownership)

• … Not checked yet

  Still maintained

  We have not read this repo from GitHub yet

• … Not checked yet

  Has a licence

  We have not read this repo from GitHub yet

• ✓ Pass

  Endpoint responds

  Responded in 65 ms (HTTP 200)

• – Not applicable

  Sign-in with OAuth

  No sign-in needed

• ✓ Pass

  No hidden instructions in tool descriptions

  Read 27 tool descriptions and found no hidden instructions to the AI

Compared with others in Otheri

• More stars than 0% of the other 32451 servers in this category
• Published to the registry more recently than 97% of the other 32451 servers in this category
• Basic checks equal to or better than 100% of the other 32451 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

README from the maker

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