E-invoice / Developers

Invoice Developer Tools

Local CLI and console available

We never receive or store your invoices.

Your inputXML / CLI / API

Your resultFree CLI and developer console

AccessFree

Local JSON console

Use the shared result contract locally. This console never calls a hosted endpoint.

Output formatSource XML

CLI / API / CI

CLI and API commands below run on your own machine or server. No public hosted service is active.

npm run cli -- validate invoice.xml --profile xrechnung --format json
npm run cli -- batch invoice-folder --profile auto --format json
npm run cli -- convert invoice.json --target peppol --output invoice.xml
AUTUM8_API_KEY=your-server-key npm run api

POST http://127.0.0.1:4410/v1/validate
Authorization: Bearer your-server-key
Content-Type: application/json
{"xml":"…","profile":"xrechnung"}

# CI: a rejected or incomplete validation exits with a nonzero status.
npm run cli -- validate synthetic-fixtures --profile xrechnung > validation.json

Technical validation is not legal certification or a guarantee of network acceptance.

What this tool does

What you get

Free CLI and developer console
No invoice uploads
No invoice cloud storage

Use the shared local engine through the CLI, browser console or optional authenticated self-hosted API. No public hosted endpoint is active.

Test your integration with the free local CLI and console. Keep invoice data on your infrastructure; no paid hosted endpoint is available.

Technical Specification & Privacy Architecture

Pinned Official Standard & Version: EN 16931 1.3.16 + UBL 2.1 / UN/CEFACT CII D16B
Supported XML Namespaces & Profiles: ubl:Invoice, ubl:CreditNote, rsm:CrossIndustryInvoice, KSeF Faktura FA(3)
Privacy & Execution Architecture: 100% client-side WebWorker execution via libxml2-wasm and SaxonJS; 0 bytes uploaded to any server.
Output Verification: Namespace-aware XPath source mapping + decimal.js arithmetic cross-checks (BR-CO-10/13/15/16).

Coverage and versions

UBL 2.1 / CII D16B · EN16931 1.3.16 · XRechnung 2026-08-31

Technical validation is not legal certification or a guarantee of network acceptance.

Choose the recipient’s required profile. Viewing, XML technical validation and transmission acceptance are separate steps.

github.com ↗

AUTUM8 READY

Free checks. Paid resolution.

One Ready plan works across supported invoice formats.

Preview

Free

Viewing, single-file validation, plain-language errors and inspection exports stay free.

$0.00

Viewing, single-file validation, plain-language errors and inspection exports stay free.
Invoice contents stay on your device by default.

Free ↑

Indicative USD prices exclude applicable tax. The final currency and total must be confirmed before purchase.

Team collaboration and hosted API are deferred; not included in the current preview.

Implementation preview. Checkout remains disabled; no payments are taken.

Autum8 is owned and operated by Northkit Ventures.

BEFORE YOU START

About this tool

What does Invoice Developer Tools do?

Use the invoice CLI or browser console to inspect, validate or convert supported files. The optional authenticated API runs on your own server; Autum8 does not operate a paid hosted API.

Are my invoices uploaded or stored by Autum8?

No. The browser tools do not send invoice contents or filenames to Autum8 and do not store invoices in the cloud. Explicitly saved mappings and preferences stay in browser storage. Website hosting receives ordinary HTTP metadata; see the privacy page.

What can I use free, and what needs a plan?

The local CLI and developer console are free. No hosted API subscription is available.

Does a passed check guarantee invoice acceptance?

No. Technical validation is separate from legal compliance, recipient requirements and network delivery. Autum8 does not send invoices to Peppol, accounting services or government portals.

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