FastBill MCP by usefulapi

MCP server · hosted · v1.0.0 · io.usefulapi/fastbill

Online · tested 3h agoNEW · 5h agoSeen in the registry 4h ago

Read FastBill customers, invoices, estimates, expenses; create customers, invoices, projects.

What it does

FastBill 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 · 22 tools

Version1.0.0

PriceNot in the registry

First seen26 Oct 2026

Last checked4h ago

How to connect

As declared in the Official MCP Registry · hosted endpoint tested by Electra Index 3h ago (live check)

Hosted endpoint

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

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

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

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

Live check

Electra Index connected to the hosted endpoint 3h ago

ONLINE FastBill MCP by usefulapi answered an MCP connection on 26 Oct 2026 and introduced itself as fastbill-mcp 1.0.0 (MCP protocol 2025-06-18).

22 tools offered to AI assistants

fastbill_list_customers · List customers (name, address, e-mail, VAT id, payment terms and bank details as stored in FastBill). Filter by search term (organization, name, address, zip, e-mail or tags), customer number, country or city. customer.get.
fastbill_get_customer · One customer by FastBill customer id. customer.get with CUSTOMER_ID.
fastbill_list_contacts · List contact persons of customers (name, position, e-mail, phone). Filter by customer, search term or contact id. contact.get.
fastbill_list_invoices · List outgoing invoices, drafts and credit notes with totals, state (draft, unpaid, overdue, paid, canceled), dates and line items. Filter by customer, number, type, date ranges (invoice date, due date, paid date, last update). invoice.get.
fastbill_get_invoice · One invoice by FastBill invoice id, with all line items, VAT, payments and the document URL. invoice.get with INVOICE_ID.
fastbill_list_recurring_invoices · List recurring invoice templates (customer, interval data, totals, items). recurring.get.
fastbill_list_estimates · List estimates (quotes) with state (a created, b sent, c negotiation, d accepted, e rejected, f invoiced), totals and items. estimate.get.
fastbill_list_expenses · List expense entries (supplier, category, net/VAT/gross, dates, document URL). Filter by invoice number or date ranges. expense.get.
fastbill_list_revenues · List revenue entries (income booked in FastBill: customer, totals, dates, payments). Takes the same filters as invoices. revenue.get.
fastbill_list_articles · List products and services (article number, type, title, unit price, VAT, unit). article.get.
fastbill_list_projects · List projects (name, customer, hourly rate, VAT, start/end date). project.get.
fastbill_list_time_entries · List work time entries (customer, project, date, minutes, billable minutes, comment, invoice). Without filters FastBill returns the latest entries of the current month. time.get.

Show 10 more

fastbill_list_templates · List the invoice/estimate templates (template id, name, hash). Use a template id with the create tools. Ids change whenever a template is edited. template.get.
fastbill_create_customer · WRITE: create a customer. customer_type is required; a business needs organization, a consumer needs last_name. Bank details are not accepted by this tool. FastBill does not check for duplicates, so search with fastbill_list_customers first
fastbill_update_customer · WRITE: update fields of an existing customer; only the fields you pass change. Bank details are not accepted by this tool. customer.update.
fastbill_create_invoice · WRITE: create an invoice for a customer from line items. FastBill stores it as a draft; it gets its number and becomes final only with fastbill_complete_invoice, and it is never sent by this tool. Check the result with fastbill_get_invoice.
fastbill_complete_invoice · WRITE, NOT REVERSIBLE: turn a draft invoice into a final invoice. FastBill assigns the invoice number and PDF; a final invoice can no longer be edited (it can only be canceled in FastBill). Nothing is sent to the customer. Only call this af
fastbill_set_invoice_paid · WRITE: mark a final invoice as paid, with the payment date and method. invoice.setpaid.
fastbill_create_estimate · WRITE: create an estimate (quote) for a customer from line items. It is not sent. estimate.create.
fastbill_create_article · WRITE: create a product or service (article number, title and unit price are required). article.create.
fastbill_create_project · WRITE: create a project for a customer (name and customer are required). project.create.
fastbill_create_time_entry · WRITE: book a work time entry on a project (customer, project and start time are required). time.create.

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
On quote
Apollo.io90
$49/mo · free plan

Facts & evidence

Each fact shows where it was seen and when.

Fact	Value	Evidence	Source	Last confirmed
Hosted endpoint	https://fastbill.usefulapi.io/mcp	DECLARED	SRC-001 Official MCP Registry	4h ago
Local install (package)	no	DECLARED	SRC-001 Official MCP Registry	4h ago
Remote access (hosted)	yes	DECLARED	SRC-001 Official MCP Registry	4h ago
Website	https://usefulapi.io/fastbill/	DECLARED	SRC-001 Official MCP Registry	4h ago
Repository	https://github.com/m190/usefulapi-mcp	DECLARED	SRC-001 Official MCP Registry	4h ago
Registry status	active	DECLARED	SRC-001 Official MCP Registry	4h ago
Version	1.0.0	DECLARED	SRC-001 Official MCP Registry	4h ago
MCP server	yes	DECLARED	SRC-001 Official MCP Registry	4h ago

Change history

NEW26 Oct 2026
first seen in the index

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Questions about FastBill MCP by usefulapi

How do I connect FastBill MCP by usefulapi?

Use the hosted endpoint https://fastbill.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 FastBill MCP by usefulapi offer?

When Electra Index connected on 26 Oct 2026, it listed 22 tools: fastbill_list_customers, fastbill_get_customer, fastbill_list_contacts, fastbill_list_invoices, fastbill_get_invoice, fastbill_list_recurring_invoices, fastbill_list_estimates, fastbill_list_expenses and more. The full list is in "Live check" above.

Is FastBill MCP by usefulapi online?

Yes. Its hosted endpoint answered an MCP connection from Electra Index 3h ago.

What can I use FastBill MCP by usefulapi for?

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