MCP server

Quaderno MCP by usefulapi

io.usefulapi/quaderno

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

MCP server for Quaderno — tax-rate calculation, invoices, contacts, products, receipts & expenses.

Website Source

At a glance

Type

MCP server

Publisher

usefulapi.io (verified by the MCP Registry)

Status

Working at last check

Tools

23

Token cost

About 5,114 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

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

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.quaderno]
url = "https://quaderno.usefulapi.io/mcp"

Gemini CLI

{"mcpServers":{"quaderno":{"httpUrl":"https://quaderno.usefulapi.io/mcp"}}}

Cursor

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

VS Code

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

Antigravity

agy mcp add quaderno https://quaderno.usefulapi.io/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"quaderno","server_url":"https://quaderno.usefulapi.io/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"quaderno","server_url":"https://quaderno.usefulapi.io/mcp"}

Tools

• quaderno_calculate_tax ~579 tokens
  Calculate the correct tax rate/amount for a sale given the customer's location and product. This is Quaderno's flagship endpoint — it applies the right VAT / GST / US sales-tax rules per jurisdiction. READ-ONLY (no record is created). Quaderno API: GET /tax_rates/calculate. Returns { name, rate, cou
• quaderno_create_contact ~380 tokens
  MUTATES Quaderno data — create a contact (customer or vendor). Provide kind plus a name; use `fields` for any other Quaderno contact attribute (phone_1, region, postal_code, city, street_line_1/2, tax_status, language, discount, notes, processor/processor_id). Quaderno API: POST /contacts. Returns t
• quaderno_create_invoice Moves money · ~429 tokens
  MUTATES Quaderno data — create an invoice for a contact. Provide contact_id (or a contact via `fields`) and items; use `fields` for any other attribute (currency, issue_date, due_date, po_number, notes, tag_list, custom_metadata, payment_details). Each item = { description, quantity, unit_price, tax
• quaderno_create_item ~327 tokens
  MUTATES Quaderno data — create a product/item in the catalog. Provide name + unit_cost; use `fields` for any other attribute (code, description, tax_class, tax_type, currency, country, stock). Quaderno API: POST /items. Returns the created item.
• quaderno_create_transaction ~452 tokens
  MUTATES Quaderno data — record a sale or refund transaction (Quaderno computes tax and produces the compliant document). Provide the customer, items, and payment. Use `fields` for any other attribute (date, currency, shipping_address, evidence, processor, processor_id, processor_fee_cents, exchange_
• quaderno_get_contact ~83 tokens
  Fetch a single contact by id. Quaderno API: GET /contacts/{id}.
• quaderno_get_credit_note ~87 tokens
  Fetch a single credit note by id. Quaderno API: GET /credit_notes/{id}.
• quaderno_get_expense ~83 tokens
  Fetch a single expense by id. Quaderno API: GET /expenses/{id}.
• quaderno_get_invoice ~100 tokens
  Fetch a single invoice by id (full object incl. items, taxes, payments, permalink, pdf). Quaderno API: GET /invoices/{id}.
• quaderno_get_item ~83 tokens
  Fetch a single product/item by id. Quaderno API: GET /items/{id}.
• quaderno_get_receipt ~83 tokens
  Fetch a single receipt by id. Quaderno API: GET /receipts/{id}.
• quaderno_list_contacts ~253 tokens
  List contacts (customers/vendors), newest first. Quaderno API: GET /contacts. Returns contact objects (id, kind, first_name, last_name, contact_name, email, country, tax_id, tax_status, …), wrapped as { data, pagination } when more pages exist.
• quaderno_list_credit_notes ~274 tokens
  List credit notes (refund documents), newest first. Quaderno API: GET /credit_notes. Wrapped as { data, pagination } when more pages exist.
• quaderno_list_expenses ~266 tokens
  List expenses (bills you received), newest first. Quaderno API: GET /expenses. Wrapped as { data, pagination } when more pages exist.
• quaderno_list_invoices ~348 tokens
  List invoices, newest first, with optional filters. Quaderno API: GET /invoices. Returns invoice objects (id, number, issue_date, due_date, currency, contact, items, taxes, payments, state, total_cents, subtotal_cents), wrapped as { data, pagination } when more pages exist.
• quaderno_list_items ~228 tokens
  List products/items in the catalog, newest first. Quaderno API: GET /items. Returns item objects (id, code, name, kind, product_type, unit_cost, tax_class, tax_type, currency, stock, …), wrapped as { data, pagination } when more pages exist.
• quaderno_list_jurisdictions ~85 tokens
  List the tax jurisdictions (id, name, country, region) where the account is registered to collect tax. Quaderno API: GET /jurisdictions.
• quaderno_list_receipts ~261 tokens
  List receipts, newest first. Quaderno API: GET /receipts. Wrapped as { data, pagination } when more pages exist.
• quaderno_list_tax_codes ~89 tokens
  List the product tax codes Quaderno supports (id, name, description) — used as the tax_code on products / tax calculations. Quaderno API: GET /tax_codes.
• quaderno_list_webhooks ~70 tokens
  List the account's configured webhooks (id, url, events). Quaderno API: GET /webhooks.
• quaderno_ping ~76 tokens
  Verify the API key and connection by pinging Quaderno. Returns account/authentication status. Quaderno API: GET /ping.
• quaderno_request ~174 tokens
  Power-user escape hatch: GET any Quaderno API path not wrapped by a dedicated tool. READ-ONLY — only GET is allowed. Path is taken after /api (e.g. "/tax_ids", "/evidence"). Quaderno API: GET {path}.
• quaderno_update_contact ~304 tokens
  MUTATES Quaderno data — update an existing contact. Only the fields you pass are changed; use `fields` for any attribute not typed here. Quaderno API: PUT /contacts/{id}. Returns the updated contact.

Browse

• PDF tools
• Email
• Payments
• Invoicing and accounting

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