Name: Quaderno
Author: usefulapi

Quaderno MCP

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

Tool-list grade A Remote · Streamable HTTP No auth needed 23 tools v1.11.1

No reviews yet by usefulapiGitHub The publisher’s own endpoint — this marketplace is not in the path

93/100

tool-list score

tools declared

remote

at its publisher

—

calls last 7d

What it does

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

Quickstart

# 1 — add it to Claude Code
claude mcp add --scope user --transport http quaderno-mcp https://quaderno.usefulapi.io/mcp

# 2 — ask your agent for something these tools do
#   ping, calculate_tax, list_invoices and 20 more

Quaderno costs nothing on mcprush: there is no plan to choose here, no cap to set and nothing mcprush can bill you for.

Publishernot claimed

usefulapi334 servers

24 categories

All 334 servers

Collected from a public index. Nobody has claimed this account, so nothing here was written by its author — claim it if it is yours.

Tool surface

What the model actually sees. Descriptions are diffed on every release — see version history.

Only tools that write or reach the network

Verify the API key and connection by pinging Quaderno. Returns account/authentication status. Quaderno API: GET /ping.

No parameter schema on file.

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, country, region, county, city, tax_code, status (taxable|non_taxable|not_registered|reverse_charge), ta

Parameter	Type	Required	Notes
to_country	string	yes	The customer's country — 2-letter ISO code (e.g. "US", "DE"). Required.
to_postal_code	string	no	The customer's ZIP / postal code (recommended for US sales tax).
to_city	string	no	The customer's city (recommended for US sales tax).
to_street	string	no	The customer's street address (recommended for US sales tax).
from_country	string	no	The seller's country (2-letter ISO); defaults to the account country.
from_postal_code	string	no	The seller's postal code.
tax_id	string	no	The customer's tax ID / VAT number (may trigger reverse-charge).
tax_code	string	no	Product tax code, e.g. "standard", "reduced", "exempt", "eservice", "ebook", "saas", "consulting".
tax_behavior	string	no	Whether the amount includes tax or not.
product_type	string	no	Whether the product is a good or a service.
amount	number	no	Transaction amount to compute the tax on.
currency	string	no	ISO 4217 currency code (e.g. "USD").
date	string	no	Transaction date (YYYY-MM-DD); defaults to today.

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.

Parameter	Type	Required	Notes
q	string	no	Search by invoice number, customer name, or PO number.
date	string	no	Date range filter, e.g. "2026-01-01,2026-12-31".
state	string	no	Filter by invoice state.
contact	string	no	Filter by customer (contact) id.
created_before	string	no	Cursor for pagination: return records created before this id (from X-Pages-NextPage / a prior record id).
page	integer	no	Page number (legacy pagination; prefer created_before).
per_page	integer	no	Entries per page (1-100, default 25).

Fetch a single invoice by id (full object incl. items, taxes, payments, permalink, pdf). Quaderno API: GET /invoices/{id}.

Parameter	Type	Required	Notes
id	string	yes	The resource id.

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.

Parameter	Type	Required	Notes
q	string	no	Search by contact name, email, or tax ID.
created_before	string	no	Cursor for pagination: return records created before this id (from X-Pages-NextPage / a prior record id).
page	integer	no	Page number (legacy pagination; prefer created_before).
per_page	integer	no	Entries per page (1-100, default 25).

Fetch a single contact by id. Quaderno API: GET /contacts/{id}.

Parameter	Type	Required	Notes
id	string	yes	The resource id.

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.

Parameter	Type	Required	Notes
created_before	string	no	Cursor for pagination: return records created before this id (from X-Pages-NextPage / a prior record id).
page	integer	no	Page number (legacy pagination; prefer created_before).
per_page	integer	no	Entries per page (1-100, default 25).

Fetch a single product/item by id. Quaderno API: GET /items/{id}.

Parameter	Type	Required	Notes
id	string	yes	The resource id.

List credit notes (refund documents), newest first. Quaderno API: GET /credit_notes. Wrapped as { data, pagination } when more pages exist.

Parameter	Type	Required	Notes
q	string	no	Search by number, customer name, or PO number.
date	string	no	Date range filter, e.g. "2026-01-01,2026-12-31".
contact	string	no	Filter by customer (contact) id.
created_before	string	no	Cursor for pagination: return records created before this id (from X-Pages-NextPage / a prior record id).
page	integer	no	Page number (legacy pagination; prefer created_before).
per_page	integer	no	Entries per page (1-100, default 25).

Fetch a single credit note by id. Quaderno API: GET /credit_notes/{id}.

Parameter	Type	Required	Notes
id	string	yes	The resource id.

List receipts, newest first. Quaderno API: GET /receipts. Wrapped as { data, pagination } when more pages exist.

Parameter	Type	Required	Notes
q	string	no	Search by number or customer name.
date	string	no	Date range filter, e.g. "2026-01-01,2026-12-31".
contact	string	no	Filter by customer (contact) id.
created_before	string	no	Cursor for pagination: return records created before this id (from X-Pages-NextPage / a prior record id).
page	integer	no	Page number (legacy pagination; prefer created_before).
per_page	integer	no	Entries per page (1-100, default 25).

Fetch a single receipt by id. Quaderno API: GET /receipts/{id}.

Parameter	Type	Required	Notes
id	string	yes	The resource id.

List expenses (bills you received), newest first. Quaderno API: GET /expenses. Wrapped as { data, pagination } when more pages exist.

Parameter	Type	Required	Notes
q	string	no	Search by number or vendor name.
date	string	no	Date range filter, e.g. "2026-01-01,2026-12-31".
contact	string	no	Filter by vendor (contact) id.
created_before	string	no	Cursor for pagination: return records created before this id (from X-Pages-NextPage / a prior record id).
page	integer	no	Page number (legacy pagination; prefer created_before).
per_page	integer	no	Entries per page (1-100, default 25).

Fetch a single expense by id. Quaderno API: GET /expenses/{id}.

Parameter	Type	Required	Notes
id	string	yes	The resource id.

List the product tax codes Quaderno supports (id, name, description) — used as the tax_code on products / tax calculations. Quaderno API: GET /tax_codes.

No parameter schema on file.

List the tax jurisdictions (id, name, country, region) where the account is registered to collect tax. Quaderno API: GET /jurisdictions.

No parameter schema on file.

List the account's configured webhooks (id, url, events). Quaderno API: GET /webhooks.

No parameter schema on file.

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}.

Parameter	Type	Required	Notes
path	string	yes	API path after /api, starting with a slash, e.g. "/tax_ids".
query	object	no	Optional query params object.

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 the created contact.

Parameter	Type	Required	Notes
kind	string	yes	Contact kind.
first_name	string	no	For a person: their first name. For a company: the company name (Quaderno stores it here).
last_name	string	no	The person's last name (persons only).
contact_name	string	no	The contact person's name at a company (companies only).
email	string	no	Contact email address.
country	string	no	2-letter ISO country code.
tax_id	string	no	The contact's tax ID / VAT number.
fields	object	no	Additional raw Quaderno fields merged into the request body (escape hatch for any field not typed above).

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.

Parameter	Type	Required	Notes
id	string	yes	The resource id.
first_name	string	no	Person first name / company name.
last_name	string	no	Person last name.
contact_name	string	no	Contact person at a company.
email	string	no	Contact email address.
country	string	no	2-letter ISO country code.
tax_id	string	no	Tax ID / VAT number.
fields	object	no	Additional raw Quaderno fields merged into the request body (escape hatch for any field not typed above).

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.

Parameter	Type	Required	Notes
name	string	yes	Product name.
unit_cost	number	yes	Unit price of the product.
code	string	no	SKU / product code.
kind	string	no	Whether it is a one-off or a subscription product.
product_type	string	no	Whether the product is a good or a service.
currency	string	no	ISO 4217 currency code.
fields	object	no	Additional raw Quaderno fields merged into the request body (escape hatch for any field not typed above).

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_1_name?, tax_1_rate?, discount_rate?, … }. Quaderno API: POST /invoices. Returns the created invoic

Parameter	Type	Required	Notes
contact_id	string	no	The id of an existing contact to invoice. Omit only if you pass a full contact object via fields.
items	array	no	Line items, e.g. [{ description, quantity, unit_price, tax_1_name, tax_1_rate }].
currency	string	no	ISO 4217 currency code.
issue_date	string	no	Issue date (YYYY-MM-DD).
due_date	string	no	Due date (YYYY-MM-DD).
po_number	string	no	Purchase-order number.
notes	string	no	Free-text notes on the invoice.
fields	object	no	Additional raw Quaderno fields merged into the request body (escape hatch for any field not typed above).

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_rate, po_number, notes, tags, custom_metadata). Quaderno API: POST /transactions. Returns the create

Parameter	Type	Required	Notes
type	string	no	Transaction type (default "sale").
currency	string	no	ISO 4217 currency code.
customer	object	no	The customer contact object (or reference), e.g. { first_name, last_name, email, country, tax_id }.
items	array	yes	Required. Transaction line items, e.g. [{ description, amount, quantity, tax_code, product_type }].
payment	object	no	Payment object, e.g. { payment_method, amount, date }.
fields	object	no	Additional raw Quaderno fields merged into the request body (escape hatch for any field not typed above).

Free

$0 forever

Every tool — any call limit is its publisher’s, not ours
No card, and mcprush charges nothing for it
Runs at its publisher’s own address — this marketplace is not in the path
Nothing to cap, because mcprush bills nothing

Nothing here is billable: mcprush charges nothing to install Quaderno or to call it, at any volume.

ATool-list grade · score 93 / 100

Release 1.11.1 · scanned 20 Oct 2026

Graded from the tools this server lists, not from its source code.

Two independent axes, because powerful and malicious are different questions. The grade is threat only. The capability level is blast radius, and it is never a penalty on the grade — it is priced as one subtract-only term in the score, where you can see it.

Threat score100

Client score93

Findings0 threat · 0 capability

Capabilitymoderate

Coveragemanifest

Verificationnot in this report

Surface digest3ed124caac0993ae9964196e61a192334bd3286e3066e4afe451925328e1a6e7

Score vectorthreat 100 → client 93

Term	Level	What it prices	Points
capability-exposure	moderate	capability blast radius (moderate) — client exposure if the model is manipulated	−3
coverage-honesty	manifest	inspection depth (manifest) — how much of the target the scan could see	−4

score = clamp(round(threatScore − E_cap − E_ver − E_cov), 0, 100). No model, no opinion, no network call at scoring time: the same methodology version against the same bytes always produces this number, and every line above is a field of the report rather than a summary of it.

What the scan could actually read

A grade is only as meaningful as its coverage, so the scanner publishes its own depth before it publishes its result.

The scan read each tool’s name, description, input schema and annotations exactly as the server listed them the last time it answered us; no code was reviewed. We ask the server again about once a month, and a list that changed is graded again.

Tool surfaceread

Implementation sourcenot available

Package metadatanot available

Live transportnot available

The implementation source was not read — this reflects the declared tool metadata only.

Capability — what it could do if the model were manipulated

Tags derived from each tool’s schema and the implementation, not from what the tool calls itself. moderate is the level these add up to.

Tool	Capability tags	Why the tag was assigned
ping	no tags
calculate_tax	no tags
list_invoices	no tags
get_invoice	untrusted-input	untrusted-input: keyword "fetch"
list_contacts	no tags
get_contact	untrusted-input	untrusted-input: keyword "fetch"
list_items	no tags
get_item	untrusted-input	untrusted-input: keyword "fetch"
list_credit_notes	no tags
get_credit_note	untrusted-input	untrusted-input: keyword "fetch"
list_receipts	no tags
get_receipt	untrusted-input	untrusted-input: keyword "fetch"
list_expenses	no tags
get_expense	untrusted-input	untrusted-input: keyword "fetch"
list_tax_codes	no tags
list_jurisdictions	no tags
list_webhooks	no tags
quaderno_request	no tags
create_contact	state-write	state-write: declares destructiveHint: true
update_contact	state-write	state-write: declares destructiveHint: true
create_item	state-write	state-write: declares destructiveHint: true
create_invoice	state-write	state-write: declares destructiveHint: true
create_transaction	state-write	state-write: declares destructiveHint: true

Toxic-flow graph

The lethal trifecta, checked as a graph rather than as a checklist: untrusted input, a sensitive source and an external sink have to meet before there is a path worth worrying about.

The public result for this release does not print the flow graph, so there is nothing to show here. That is not the same as "no paths were found": what the scan did read is above, under coverage.

Supply chain and provenance

Integrityfirst-seen

Surface digest3ed124caac0993ae

Scanned2026-10-20

This is the first scan of this surface here, so there is nothing yet to compare it against.

Every result on this tab comes from one deterministic pass over the published package — offline, rule by rule, and auditable line by line above. Same methodology version, same bytes, same score.

Where are you running it?

Tool surface

Release history

Quaderno MCP

What it does

Quickstart

Where are you running it?

Tool surface

What counts against your monthly calls

What the scan could actually read

Capability — what it could do if the model were manipulated

Toxic-flow graph

Supply chain and provenance

Release history

See also