Pull your a3innuva Contabilidad data into your systems

What you can build on a3innuva

• Get the invoice situation in Cartera

  Build this

  Reads the listado de situación de facturas (invoice status list) in Cartera for one company: how much of each invoice is paid or charged and how much is pending.

  Takes

  Company, issued or received, date range (optional)

  Returns

  Invoice number, invoice date, customer or supplier, total, amount paid or charged, amount pending

• Check the SII status of invoices

  Build this

  Reads the SII screen for one company: the last submission and the state of each issued and received invoice, with the reason for any rejection or error.

  Takes

  Company, state (optional)

  Returns

  Invoice number, issued or received, last submission date, state, rejection or error reason

• Get a Balance or PyG listing

  Build this

  Reads a Balance or Cuenta de Pérdidas y Ganancias (profit and loss) listing from the Informes menu for one company and period.

  Takes

  Company, listing (Balance or PyG), format (normal, abreviado or pymes), period

  Returns

  Line, description, amount

• Enter a received invoice

  Build this

  Fills in a received invoice for an existing supplier of one company in invoice entry, which a3innuva keeps separate from journal entries, and saves it.

  Takes

  Company, supplier, invoice number, invoice date, taxable base, VAT type, VAT amount, withholding (optional)

  Returns

  Invoice number, supplier, invoice date, total, saved

Automate a3innuva with a workflow

A workflow runs your methods as one process, with nobody at the screen. A schedule or a call from your own system starts it, the steps run in order, and the result arrives in your inbox or in the systems you already use.

• Pending cobros and pagos for every client company

  Build this

  Starts

  Every weekday at 8:00

  Step 1

  For each company you name, get the invoice situation in Cartera for its issued and received invoices.

  Step 2

  Keep the invoices that still have an amount pending.

  Step 3

  Email you the list, one section per company, cobros first and pagos after.

• Newly rejected SII invoices, sent to your team

  Build this

  Starts

  Every weekday at 13:00

  Step 1

  For each company, check the SII status of its invoices.

  Step 2

  Keep the rejected or errored invoices that were not there on the last run.

  Step 3

  Post each one, with the company and the rejection reason, to your Slack or ticketing webhook.

• Monthly PyG for each client, summarized

  Build this

  Starts

  On the 5th of every month at 9:00

  Step 1

  For each company, get the Pérdidas y Ganancias listing for the month just closed.

  Step 2

  Have an AI step summarize the main lines: income, expenses and the result.

  Step 3

  Email you one summary per company with the listing's lines.

You can run a workflow by hand on every plan, Free included. Schedules and webhook triggers come with the paid plans, from $29 a month.

Once built, one call from your code

Once you have built a method, it is one POST to /v1/runs from your backend, or a tool an AI agent calls over MCP. This is what “Get the invoice situation in Cartera” would look like.

curl https://api.fous.com/v1/runs \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "method": "a3innuva.wolterskluwer.es/get_invoice_situation",
    "input": {
      "company": "Acme Distribución SL",
      "type": "issued",
      "from": "2026-10-01",
      "to": "2026-11-11"
    }
  }'

{
  "status": "completed",
  "data": {
    "company": "Acme Distribución SL",
    "type": "issued",
    "invoices": [
      {
        "invoice_number": "F2026-0418",
        "invoice_date": "2026-10-14",
        "customer": "Northwind Iberia SL",
        "total": 2420,
        "charged": 1210,
        "pending": 1210
      }
    ],
    "currency": "EUR",
    "count": 1
  }
}

An example with invented data, not a ready-made endpoint. The method exists in your organization once you build it, and its name, inputs and fields follow your request.

A3innuva’s own options

Wolters Kluwer publishes a REST API for a3innuva Contabilidad, and others for a3innuva Nómina and a3factura. Calls need the Conectia module, contracted through Wolters Kluwer's sales team, an Apikey for that product and an OAuth client that Wolters Kluwer issues for each customer. Without it you have Importia for Excel imports and the Excel and PDF exports of the listings.

Read on November 12, 2026: a3innuva Contabilidad API: Cómo empezar, Conectia, a3innuva Contabilidad product sheet.

Signing in to a3innuva

a3innuva signs you in with a Wolters Kluwer Account: your email address, or your Google or Facebook account. The sign-in page asks users to set up multifactor authentication (MFA) to keep their access. One account can reach several clients. With Fous you sign in once through that sign-in with your own account, and the login is sealed with AES-256.

Worth knowing

One Apikey per product

The Conectia Apikey works only for the product it was generated for: an a3innuva Nómina key cannot call the a3innuva Contabilidad API. Users who cannot see Conectia need permissions from their account's administrator.

The API asks for a specific user profile

The a3innuva Contabilidad user behind the API must have the Administrador profile, or a Personalizado profile with access to Contabilidad, Modelos and Importia.

Some tasks are for the advisor only

Each client company works in modo lectura (read only) or modo edición (editing), and filing taxes and the accounting close are for the advisor only. A method can do only what the account it signs in with can.

Listings and imports run in the background

a3innuva generates listings, imports files and posts depreciation in the background, so a listing may not be ready to read the moment it is requested.

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