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Automate accounts payable in A3 with Calitem's AI

Francesco Domizio 4 min read

If your team works with A3 (a3ERP, a3innuva or a3con) and processes supplier invoices every week, you know the friction point: someone receives the invoice, reads it, keys it into A3, sends it out for approval by email and, when it comes back, posts it.

The integration between Calitem and A3 removes that in-between work. The invoice arrives in Calitem, the AI processes it end to end, and the journal entry shows up in A3 via API, with nobody typing it.

This article explains how the integration works, step by step. It’s for accounts-payable leads, controllers and accounting firms already on A3 who want to see how Calitem fits before booking a demo.

Why this integration is different

Most invoice-capture tools do OCR, export a file and leave the rest to you. Calitem works differently in four ways that matter as volume grows.

Four ways Calitem is different: powered by AI, any document, custom fields, approval before A3

The first point is the root: Calitem is AI, not an OCR with rules bolted on. Everything else follows from that. The AI reads any document without templates, learns to extract your own fields like the cost center, and only sends A3 what has already passed through your approval workflow, never an unreviewed draft.

The flow at a glance

From the moment an invoice arrives to the moment the entry is in A3, Calitem’s AI does the whole run: it reads it, categorizes it against your chart of accounts, passes it through your approval workflow and sends it to A3 via API.

An invoice's journey from Calitem to A3: capture, read and extract, assign the account against the chart of accounts, automatic approval and send to A3 via API
An invoice's journey: it enters Calitem, gets categorized against your chart of accounts, is approved and sent to A3 via API. No document downloads, no typing the entry.

The manual accounts-payable loop with A3 today

Without an integration, an invoice’s cycle passes through several hands and several days. Reception in a shared inbox, reading and keying into A3, sending out for approval by email, waiting, and final posting. Every hop is a chance for the invoice to stall.

The cost isn’t just the typing time. It’s the accumulated delay, the transcription errors, the invoices approved without checking against the order, and the close that always runs late because invoices keep arriving in the last week.

What the integration is: via API, no document downloads

Calitem connects to A3 via API. It doesn’t generate a file someone has to download and import into A3, and it doesn’t leave a manual step between the two tools. When an invoice finishes its run in Calitem, the entry is written straight into A3.

The intelligence lives in Calitem: the AI is what reads, understands and posts the invoice. The integration just writes that result into A3.

The flow is the same for a3ERP, a3innuva and a3con. What changes is the A3 product you connect to, not how Calitem works.

The process, step by step

  1. Capture. The invoice arrives by email or direct upload, with no attachments to download.
  2. Extraction. The AI reads any document without templates and pulls supplier, net, VAT, total and your own fields, like the cost center.
  3. Categorization. It reads your chart of accounts and proposes the right account, learning from your history (utilities to 628, leases to 6210).
  4. Three-way matching. It cross-checks invoice, order and delivery note, and only flags you when something doesn’t add up, with the difference already identified.
  5. Approval. The invoice runs through your workflow (by amount, category, cost center or department) before it reaches A3. A3 only receives what’s approved.
  6. Send to A3. The entry is written via API, with the account and cost center included. No intermediate file, no manual import.
  7. In A3. The supplier invoice and its journal entry appear, with no typing. A3 stays your source of truth; Calitem just removes the work of getting there.

Setup checklist

How to start

If you’re already on A3 and want to see the integration with your own invoices, the best way is a demo with your real case. Check the plans on the pricing page and book a demo to see the AI working on your own invoices, from capture to the entry in A3.