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inv.bg MCP by usefulapi

MCP server · hosted · v1.1.0 · io.usefulapi/inv-bg
Online · tested 2h agoNEW · 3h agoNew version 1h agoSeen in the registry 43m ago

Read inv.bg invoices, clients, items, payments and banking; create clients, items, invoices.

Website ↗Source code ↗How to connect ↓

What it does

inv.bg 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 2 capabilities: invoicing and payments. That makes it a candidate for tasks such as detect fraudulent transactions or 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
Version1.1.0
PriceNot in the registry
First seen25 Oct 2026
Last checked43m ago

How to connect

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

Hosted endpoint

  • https://inv-bg.usefulapi.io/mcp streamable-http

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

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

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

Live check

Electra Index connected to the hosted endpoint 2h ago

ONLINE inv.bg MCP by usefulapi answered an MCP connection on 25 Oct 2026 and introduced itself as inv-bg-mcp 1.1.0 (MCP protocol 2025-06-18).

27 tools offered to AI assistants

  • invbg_get_account · The company (id, name, subdomain) and the user the API token belongs to. GET /account.
  • invbg_get_firm · The issuing company's details: name, Bulstat, VAT registration and VAT number, address, MOL, contact email, custom properties. GET /firm.
  • invbg_list_invoices · List documents (tax invoices, proformas, debit and credit notes) with filters: type, number, issue-date range, amount ranges, payment status, client, draft/annulled, sent status, currency. Each row has number, client, totals, balance_paid,
  • invbg_get_invoice · One document by id: number, type, issuer and recipient, line items, VAT, totals, balance_paid and balance_due, dates, bank accounts, sent/confirmation status. Optionally with its comments. GET /invoices/{id}.
  • invbg_list_invoice_types · All document types of this company (tax invoice, proforma, debit/credit note and any custom types) with their codes. GET /invoices/types.
  • invbg_get_next_invoice_number · The next free document number of the default number set for a document type. Read-only: it does not reserve the number. GET /invoices/free-number.
  • invbg_list_number_sets · The company's invoice number sets (separate numbering series) with ids; pass an id as number_set to invbg_create_invoice. GET /invoices/number-sets.
  • invbg_list_payment_methods · The payment method codes a document accepts (cash, bank, card, ...) with their names. GET /invoices/payment-methods.
  • invbg_list_vat_exemption_reasons · The legal reasons for issuing a document without VAT (use one as vat_exemption_reason in invbg_create_invoice). GET /invoices/without-vat-reasons.
  • invbg_list_clients · List or search clients (customers): name, Bulstat, VAT number, address, MOL, whether it is a person. GET /clients.
  • invbg_get_client · One client by id with all stored details (names in both languages, Bulstat, VAT, address, MOL, code, custom properties). GET /clients/{id}.
  • invbg_list_client_contacts · Contact people of a client (or of all clients) with their names and roles. GET /client-contacts.
Show 15 more
  • invbg_list_items · The product/service catalogue: name, price, currency, unit, tags. GET /items.
  • invbg_get_item · One catalogue item by id. GET /items/{id}.
  • invbg_list_item_units · Units of measure accepted as quantity_unit on items and invoice lines. GET /items/units.
  • invbg_list_payments · Recorded payments (income and expense) with amount, method, date, counterparty, how much is allocated to invoices (amount_used) and what is left (amount_left). GET /payments.
  • invbg_get_payment · One payment by id with its allocations to invoices (invoice_payments). GET /payments/{id}.
  • invbg_list_bank_accounts · The company's bank accounts (alias, bank, IBAN, BIC, currency). GET /bank/accounts.
  • invbg_list_bank_transactions · Imported bank transactions with amount, date, counterparty, and whether they are linked to a document. Useful for reconciliation (linked=false = unmatched). GET /bank/transactions.
  • invbg_list_cashboxes · The company's cash registers (cashboxes) with names and balances. GET /cashboxes.
  • invbg_get_exchange_rate · The exchange rate of a currency to BGN on a date (default: today), as inv.bg uses it for documents. GET /currency/rates/{currency}.
  • invbg_create_client · WRITE: add a company client (name, Bulstat, VAT, address, MOL). Check invbg_list_clients first to avoid a duplicate. For an individual (EGN) issue the document with invbg_create_invoice and is_to_person instead. POST /clients.
  • invbg_update_client · WRITE: change fields of an existing client (only the fields you pass are changed). PATCH /clients/{id}.
  • invbg_create_item · WRITE: add a product or service to the catalogue (name, price, unit). POST /items.
  • invbg_create_invoice · WRITE: create a document (tax invoice by default; proforma, debit/credit note via type). It is saved as a DRAFT unless draft is false: an issued document takes the next legal number and cannot be undone through this tool. Address it to an e
  • invbg_send_invoice_email · WRITE: email a document to a recipient (as a download link or an attached file). The email goes out immediately and cannot be recalled. POST /invoices/{id}/emails.
  • invbg_record_invoice_payment · WRITE: record a payment received for a document and allocate it, which updates the document's balance_paid/balance_due and payment status. Two calls: POST /payments, then POST /payments/{id}/invoices. If the allocation fails the payment sta

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
Detect fraudulent transactions
Payments
50%
Send and chase invoices
Invoicing
50%
Reconcile payments
Payments
33%
Buy products online
Payments
33%
Handle refund requests
Payments
33%

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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:

Facts & evidence

Each fact shows where it was seen and when.
FactValueEvidenceSourceLast confirmed
Version1.1.0DECLAREDSRC-001 Official MCP Registry43m ago
Hosted endpointhttps://inv-bg.usefulapi.io/mcpDECLAREDSRC-001 Official MCP Registry43m ago
Local install (package)noDECLAREDSRC-001 Official MCP Registry43m ago
Remote access (hosted)yesDECLAREDSRC-001 Official MCP Registry43m ago
Websitehttps://usefulapi.io/inv-bg/DECLAREDSRC-001 Official MCP Registry43m ago
Repositoryhttps://github.com/m190/usefulapi-mcpDECLAREDSRC-001 Official MCP Registry43m ago
Registry statusactiveDECLAREDSRC-001 Official MCP Registry43m ago
MCP serveryesDECLAREDSRC-001 Official MCP Registry43m 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 inv.bg MCP by usefulapi

How do I connect inv.bg MCP by usefulapi?

Use the hosted endpoint https://inv-bg.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 inv.bg MCP by usefulapi offer?

When Electra Index connected on 25 Oct 2026, it listed 27 tools: invbg_get_account, invbg_get_firm, invbg_list_invoices, invbg_get_invoice, invbg_list_invoice_types, invbg_get_next_invoice_number, invbg_list_number_sets, invbg_list_payment_methods and more. The full list is in "Live check" above.

Is inv.bg MCP by usefulapi online?

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

What can I use inv.bg MCP by usefulapi for?

Based on its description, it is most relevant to: detect fraudulent transactions, send and chase invoices, reconcile payments, buy products online.