Billy MCP by usefulapi is answering right now. Last checked 9 min ago. It exposes 15 tools. Last commit 12 Oct 2026.
Read Billy invoices, bills, contacts, products and postings; create contacts and draft invoices.
Uptime history
4 hours of history
4 hours agonow
100.0%
Uptime 24h
14 of 14 checks
15
Tools
read from the server
145 ms
Response time
average over 24h
0
Stars
last commit 12 Oct 2026
Nothing serious here today
Today is the operative word: we check Billy 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 9 min ago.
run in your terminal
claude mcp add billy --transport http https://billy.usefulapi.io/mcp~/Library/Application Support/Claude/claude_desktop_config.json
{
"mcpServers": {
"billy": {
"url": "https://billy.usefulapi.io/mcp"
}
}
}~/.codex/config.toml
[mcp_servers.billy]
url = "https://billy.usefulapi.io/mcp".cursor/mcp.json
{
"mcpServers": {
"billy": {
"url": "https://billy.usefulapi.io/mcp"
}
}
}.vscode/mcp.json
{
"mcpServers": {
"billy": {
"url": "https://billy.usefulapi.io/mcp"
}
}
}Available tools 15
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
billy
billy_create_contact
WRITE: create ONE new contact (customer and/or supplier) in the company's Billy account. It does not check for duplicates (call billy_list_contacts first) and nothing is sent to the contact. Not idempotent: a repeat call creates a second contact. POST /contacts.
billy_create_draft_invoice
WRITE: create ONE invoice in the DRAFT state for an existing contact. The invoice is NOT approved, booked, numbered into the ledger or sent: the user reviews it in Billy and approves and sends it there. The invoice number is assigned by Billy. No payment is created. Not idempotent: a repeat call creates a second draft. POST /invoices with state=draft.
billy_get_bill
One supplier bill by id with its lines. GET /bills/{id}.
billy_get_contact
One contact by id, with its contact persons (names and e-mail addresses). GET /contacts/{id}.
billy_get_invoice
One invoice by id with its lines (product, description, quantity, unit price, amount, tax) and its payment associations. GET /invoices/{id}.
billy_get_organization
The Billy company the access token belongs to: id, name, address, registration (CVR) number, base currency, VAT settings, fiscal year, default payment terms, invoice numbering, default accounts. Good first call. GET /organization.
billy_get_product
One product by id with its unit prices per currency. GET /products/{id}.
billy_list_accounts
The chart of accounts: account number, name, group, nature, VAT rate, bank-account flag and bank details (IBAN, bank name) of bank accounts. With is_bank_account=true this lists the bank accounts whose ids billy_list_bank_lines needs. Paged. GET /accounts.
billy_list_bank_lines
List the bank-statement lines of ONE bank account (read only; nothing is matched or reconciled): date, description, amount, side (debit/credit), reconciled flag, receipt state. Get the account id from billy_list_accounts with is_bank_account=true. Paged. GET /bankLines.
billy_list_bills
List bills (purchase invoices from suppliers): supplier, dates, state (draft/approved/voided), amount, balance, isPaid, supplier invoice number. Filter by state, supplier, dates or paid status. Paged. GET /bills.
billy_list_contacts
List customers and suppliers: name, type, address, CVR/registration number, EAN, payment terms, customer/supplier flags. The API has no documented search filter, so `search` is applied to the returned page only (case-insensitive on name, contact number and registration number); page on with next_page to look further. Paged. GET /contacts.
billy_list_invoices
List sales invoices and credit notes (newest first by default): number, date, due date, state (draft/approved/voided), amount, tax, balance, isPaid, contactId, currency. Filter by state, customer, number, date, period, paid status or free text. Paged. GET /invoices.
billy_list_postings
List ledger postings (the bookkeeping entries): date, text, account, amount, side (debit/credit), currency, voided flag. Filter by account, date or period. Read only. Paged. GET /postings.
billy_list_products
List products and services usable as invoice lines: name, product number, description, sales account, archived flag. The API has no documented search filter, so `search` is applied to the returned page only (name, productNo). Paged. GET /products.
billy_list_tax_rates
The company's VAT rates: name, rate (as a fraction, 0.25 = 25 percent), whether it applies to sales or purchases, active flag. Paged. GET /taxRates.
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://billy.usefulapi.io/mcp | streamable-http | answering | 79 ms | 9 min ago |
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Billy MCP by usefulapi — questions
Answers built from our own checks of this server.
What can Billy MCP by usefulapi do?
It exposes 15 tools, read directly from the server on our last check. Among them: billy_create_contact, billy_create_draft_invoice, billy_get_bill, billy_get_contact, billy_get_invoice, billy_get_organization and 9 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 Billy MCP by usefulapi working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 14 of 14 checks got a reply (100.0%), average response time 145 ms. The bar chart above shows every period we have measured.
How do I connect Billy MCP by usefulapi?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Billy MCP by usefulapi need an API key?
No. Billy MCP by usefulapi completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 15 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Billy MCP by usefulapi?
It answers our handshake in 145 ms on average, which is faster than 73% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is Billy MCP by usefulapi open source?
Yes — it is published under the MIT licence, written in JavaScript, 0 stars on GitHub and 1 open issue. The source link is on this page, so you can read exactly what it does with your data before you connect it.