Prototype · Preview: every server in the official registry, synced every 30 minutes. Reviews and accounts come in a later step.
PopNx MCPMCP servers for people who use AI · explained in plain words

billey MCP by usefulapi

by m190version 1.3.4i★ –iRuns in the cloud
Registry nameio.usefulapi/billey

Install

Overview

Description from the maker (original English)

Read clients, invoices, expenses, bank transactions and time entries in billey.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

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: Accounting, finance & tax

Install

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

Before you install

You need

Which app do you use?

Pick your app above. We remember it, so next time the button says “Install in …”.

Works in Claude on the web, desktop and mobile:

  1. Open Settings → Connectors
  2. Press Add custom connector
  3. Paste the address below and press Add
  4. If it asks you to sign in, sign in with the maker
SettingsConnectors1+ Add2https://…3
https://billey.usefulapi.io/mcp

Run this in your terminal

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

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

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

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

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

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

ChatGPT connects only to servers on the internet:

  1. Open ChatGPT on the web → Settings → Connectors (Apps)
  2. Press Create or Add (some plans need Developer mode under Advanced first)
  3. Paste the address below, give it a name and save
  4. If it asks you to sign in, sign in with the maker
SettingsConnectors1+ Create2https://…3
https://billey.usefulapi.io/mcp

Menu names can differ slightly by plan and over time.

Your choice stays on this device in a cookie; no account needed.

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 7, 2026. The maker wrote them, not us; we show them as plain text.

  • billey_list_clients

    List the clients of the book (name, contact, payment terms, collection method). Returns cursor pagination: follow links.next. Use updated_after to sync only changes. billey API: GET /api/v1/clients.

  • billey_get_client

    Get one client by id, with its contact and payment details. billey API: GET /api/v1/clients/{client}.

  • billey_list_invoices

    List invoices with status, dates, totals (decimal strings), the client summary and line items. Filter with updated_after for changes since a time. Returns cursor pagination. billey API: GET /api/v1/invoices.

  • billey_get_invoice

    Get one invoice by id, with its client summary and line items. billey API: GET /api/v1/invoices/{invoice}.

  • billey_list_quotes

    List quotes (offers) with status, dates, totals and line items. Returns cursor pagination. billey API: GET /api/v1/quotes (needs the quotes:read ability).

  • billey_list_expenses

    List expenses (purchase costs) with amounts, dates, the vendor summary and the account. Returns cursor pagination. billey API: GET /api/v1/expenses.

  • billey_list_vendors

    List vendors (suppliers) with their contact and payment details. Returns cursor pagination. billey API: GET /api/v1/vendors.

  • billey_list_bank_transactions

    List imported bank transactions (amount, executed date, counterparty, match and allocation state). Returns cursor pagination. billey API: GET /api/v1/bank-transactions (needs transactions:read).

  • billey_list_products

    List products and services from the book's catalogue (unit price, VAT percentage, SKU). Returns cursor pagination. billey API: GET /api/v1/products (needs products:read).

  • billey_list_projects

    List projects with their client summary. Returns cursor pagination. billey API: GET /api/v1/projects (needs projects:read).

  • billey_list_time_entries

    List logged time entries (hours and hourly rate as decimal strings, date, project). Returns cursor pagination. billey API: GET /api/v1/time-entries (needs time-entries:read).

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 8, 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 5 ms (HTTP 200)

  • – Not applicable

    Sign-in with OAuth

    No sign-in needed

  • ✓ Pass

    No hidden instructions in tool descriptions

    Read 11 tool descriptions and found no hidden instructions to the AI

Compared with others in Accounting, finance & taxi

  • More stars than 0% of the other 2911 servers in this category
  • Published to the registry more recently than 99% of the other 2911 servers in this category
  • Basic checks equal to or better than 100% of the other 2911 servers in this category

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

Common questions

Is billey MCP by usefulapi safe?

It passed 3 of 3 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.3.4) reached the registry today.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Finance Toolkit, SolidInvoice, Korea Tax Calculator

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

Finance Toolkit

by JerBouma

500+ transparent financial methods calculated from raw statements, not third-party endpoints.

Computer or cloud★ 5,496MITUpdated yesterday
Install

SolidInvoice

by SolidInvoice

Create and send invoices and quotes, manage clients, and track payments in SolidInvoice.

Runs in the cloud★ 981MITUpdated 8 days ago
Install

Korean tax calculation and tax-audit judgment MCP: 96 tools with statutory citations.

Runs on your computer★ 97MITUpdated 2 days ago
Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

billey MCP by usefulapi

Use your billey account from Claude, Cursor, or any MCP client. Read the clients, invoices, quotes, expenses, bank transactions and time entries of your book. Hosted, no local install: connect with your own credentials.

Live endpoint: https://billey.usefulapi.io/mcp · Homepage: https://usefulapi.io

Connect

  • Claude (claude.ai, Desktop): open Customize → Connectors, click + Add → Add custom connector, and paste https://billey.usefulapi.io/mcp.
  • Claude Code: claude mcp add --transport http billey https://billey.usefulapi.io/mcp, then run /mcp to log in.
  • VS Code: Add to VS Code.
  • Cursor and other clients: add the URL as a remote MCP server:
{

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

Add only the URL. Do not add an Authorization header or an API key to the client config: the server signs you in with OAuth, and the login page asks for your billey credentials.

Step-by-step setup, where to find your credentials, and FAQ: https://usefulapi.io/billey/

On first connect you provide a billey personal access token (your book's Settings → API tokens; two-factor authentication must be on). The server validates it and stores it per user. No keys go in config files.

Tools

ToolTypeWhat it does
billey_list_clientsreadList clients
billey_get_clientreadGet a client
billey_list_invoicesreadList invoices
billey_get_invoicereadGet an invoice
billey_list_quotesreadList quotes
billey_list_expensesreadList expenses
billey_list_vendorsreadList vendors
billey_list_bank_transactionsreadList bank transactions
billey_list_productsreadList products
billey_list_projectsreadList projects
billey_list_time_entriesreadList time entries
billey_usage_statusmetaUsage status (free-tier meter)
billey_request_featuremetaRequest a missing feature
billey_upgrademetaUpgrade to Pro or Pro+
billey_cancel_subscriptionmetaCancel the Pro subscription

read tools are read-only; write tools mutate data (clients should confirm them); meta tools report usage, manage your subscription or send a feature request.

Pricing

PlanPriceLimit
Free$050 tool calls / month
Pro (per user)$9/mo or $90/yr (2 months free)Unlimited*

\*Pro has a fair use limit of 10,000 tool calls a month on this server. For more, write to support@usefulapi.io.

Pro covers this server only. Subscribe with billey_upgrade (it returns a Stripe Checkout link). Cancel any time with billey_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running billey_upgrade before then undoes the cancel. Or write to support@usefulapi.io.

License

MIT — see LICENSE. Documentation only; the server is hosted.

Ask PopNx