Invoices Online MCP by usefulapi MCP Server

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answering

Invoices Online MCP by usefulapi is answering right now. Last checked 14 min ago. It exposes 13 tools. Last commit 12 Nov 2026.

Read clients, balances, invoices and jobcard status; create clients in Invoices Online.

Uptime history 25 hours of history

25 hours agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

273 ms

Response time

average over 24h

Stars

last commit 12 Nov 2026

Nothing serious here today

Today is the operative word: we check Invoices Online MCP by usefulapi every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 14 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

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

Settings → Connectors → Add custom connector, then paste this address

https://invoices-online.usefulapi.io/mcp

~/.codex/config.toml

[mcp_servers.invoices-online]
url = "https://invoices-online.usefulapi.io/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "invoices-online": {
      "url": "https://invoices-online.usefulapi.io/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "invoices-online": {
      "type": "http",
      "url": "https://invoices-online.usefulapi.io/mcp"
    }
  }
}

Available tools 13

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

invoicesonline

invoicesonline_create_client

Create a client in the business. Writes data. Only the invoice name and email are required. If the API finds a matching client, it returns that client's id and creates no duplicate. Endpoint: NewClient.php. Sends no email.

invoicesonline_find_client_id

Look up the client_id from the invoice name, email and branch name. Read only. Endpoint: GetClientID.php. Returns the id, or the vendor's error text when no client matches.

invoicesonline_get_business

Get the id and name of the Invoices Online business this API login belongs to. Read only. Endpoint: getBusinessName.php.

invoicesonline_get_client

Get one client by client_id: contact details, active flag, current balance and opening balance. Read only. Endpoint: getClientDetails_JSON.php.

invoicesonline_get_client_history

List a client's invoices, credit notes, pro-forma invoices, payments and payouts with totals and line items, plus the current and opening balance. Read only. Endpoint: getClientHistory_JSON.php.

invoicesonline_get_document_status

Get the current status name and status id of one jobcard by its number. Read only. Endpoint: getDocumentStatus.php. Only jobcard is supported.

invoicesonline_get_document_status_ids

List the status ids and their names for one document type. Read only. Endpoint: getDocumentStatusIDs.php.

invoicesonline_get_supplier

Get one supplier by supplier_id: contact details, active flag, balance and opening balance. Read only. Endpoint: getSupplierDetails_JSON.php.

invoicesonline_list_client_documents

List one client's documents of one type (invoices, quotes, credit notes, jobcards, and so on). Read only. Endpoint: getDocumentsByType_JSON.php.

invoicesonline_list_clients

List every client of the business: name, contact, email, VAT number, addresses, active flag, balance and opening balance. Read only. Endpoint: getClients_JSON.php.

invoicesonline_list_inventory_categories

List the inventory categories keyed by category id. Read only. Endpoint: InventoryCategories.php.

invoicesonline_list_inventory_items

List the inventory and stock items keyed by product code. Read only. Endpoint: InventoryItems.php.

invoicesonline_list_suppliers

List every supplier of the business with contact details, active flag, balance and opening balance. Read only. Endpoint: getSuppliers_JSON.php.

Endpoints

URL	Transport	State	Latency	Checked
https://invoices-online.usefulapi.io/mcp	streamable-http	answering	364 ms	14 min ago

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Invoices Online MCP by usefulapi — questions

Answers built from our own checks of this server.

What can Invoices Online MCP by usefulapi do?

It exposes 13 tools, read directly from the server on our last check. Among them: invoicesonline_create_client, invoicesonline_find_client_id, invoicesonline_get_business, invoicesonline_get_client, invoicesonline_get_client_history, invoicesonline_get_document_status and 7 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Invoices Online MCP by usefulapi working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 273 ms. The bar chart above shows every period we have measured.

How do I connect Invoices Online MCP by usefulapi?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Invoices Online MCP by usefulapi need an API key?

No. Invoices Online MCP by usefulapi completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 13 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Invoices Online MCP by usefulapi?

It answers our handshake in 273 ms on average, which is faster than 52% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is Invoices Online MCP by usefulapi open source?

The code is open source: it is published under the MIT licence, written in JavaScript, 1 stars on GitHub and 1 open issue. The licence covers the code in the repository, not the hosted service at invoices-online.usefulapi.io, which runs on its operator's own terms.