Quaderno

Quaderno Items API

Reusable products and services used as document line items.

Documentation GitHub OpenAPI

Operations 5

GET /items.json List items #

POST /items.json Create an item #

GET /items/{id}.json Retrieve an item #

PUT /items/{id}.json Update an item #

DELETE /items/{id}.json Delete an item #

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this

find_apisBrowse and filter every API in the catalog.
get_api_artifactsOne API's artifacts, grouped by type.
get_openapiThe primary OpenAPI for this API.
find_similar_apisAPIs that look like this one.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This API

curl "https://apis.io/api/v1/apis/quaderno-items-api"

All apis

curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

openapi: 3.2.0
info:
  title: Quaderno Items API
  description: The Quaderno API is a REST API for tax compliance, invoicing, and sales tax / VAT automation.
  version: '1.0'
  contact:
    name: Quaderno
    url: https://developers.quaderno.io
  license:
    name: Proprietary
    url: https://quaderno.io/terms/
servers:
- url: https://{account}.quadernoapp.com/api
  description: Production (account-scoped)
  variables:
    account:
      default: ACCOUNT_NAME
      description: Your Quaderno account subdomain.
security:
- basicAuth: []
tags:
- name: Items
  description: Reusable products and services used as document line items.
paths:
  /items.json:
    get:
      operationId: listItems
      tags:
      - Items
      summary: List items
      parameters:
      - $ref: '#/components/parameters/Page'
      responses:
        '200':
          description: A list of items.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Item'
        '401':
          $ref: '#/components/responses/Unauthorized'
    post:
      operationId: createItem
      tags:
      - Items
      summary: Create an item
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ItemInput'
      responses:
        '201':
          description: The created item.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Item'
        '422':
          $ref: '#/components/responses/ValidationError'
  /items/{id}.json:
    parameters:
    - $ref: '#/components/parameters/Id'
    get:
      operationId: getItem
      tags:
      - Items
      summary: Retrieve an item
      responses:
        '200':
          description: The requested item.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Item'
        '404':
          $ref: '#/components/responses/NotFound'
    put:
      operationId: updateItem
      tags:
      - Items
      summary: Update an item
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ItemInput'
      responses:
        '200':
          description: The updated item.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Item'
        '404':
          $ref: '#/components/responses/NotFound'
    delete:
      operationId: deleteItem
      tags:
      - Items
      summary: Delete an item
      responses:
        '204':
          description: The item was deleted.
        '404':
          $ref: '#/components/responses/NotFound'
components:
  responses:
    Unauthorized:
      description: Missing or invalid API key.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    NotFound:
      description: The requested resource was not found.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    ValidationError:
      description: The request payload failed validation.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  schemas:
    Item:
      allOf:
      - $ref: '#/components/schemas/ItemInput'
      - type: object
        properties:
          id:
            type: string
    ItemInput:
      type: object
      required:
      - name
      properties:
        name:
          type: string
        code:
          type: string
        unit_cost:
          type: number
        tax_code:
          type: string
        stock:
          type: integer
    Error:
      type: object
      properties:
        error:
          type: string
        errors:
          type: object
          additionalProperties: true
  parameters:
    Id:
      name: id
      in: path
      required: true
      description: The unique ID of the resource.
      schema:
        type: string
    Page:
      name: page
      in: query
      required: false
      description: Page number for paginated results (25 records per page).
      schema:
        type: integer
        default: 1
  securitySchemes:
    basicAuth:
      type: http
      scheme: basic
      description: HTTP Basic Authentication. Use your private API key as the username; the password can be any value. API keys are managed in the Quaderno account settings.