How do you use AI to convert invoices to JSON?

By Tim White · How-to · Last updated November 2, 2026

To convert invoices to JSON with AI, send each invoice to an extraction tool and get back a structured object with vendor, invoice number, dates, currency, tax, totals and an array of line items. InvoiceJet exports JSON from the app, sends it by signed webhook, or returns it from the REST API. Each field carries a confidence level and the text it was read from.

1. Send the invoice

Upload it, forward it by email, or POST it to the API as a file, a URL or base64. Add ?wait=true to the request and the API holds the connection until extraction finishes, then returns the result. Long jobs return 202 and finish in the background.

2. Read the object

The response includes the header fields, a line_items array, a confidence level for each header field and a citation (page plus the exact text) for each one. The API docs at app.invoicejet.ai/docs list the full schema.

3. Decide what to auto-post

This is where per-field confidence earns its keep. A webhook delivers a completed invoice. If vendor, total and tax are all high confidence, your code posts it to the ledger. If tax is uncertain, it routes that one invoice to a person and lets the rest through. You automate the invoices that are safe and hold back only the ones that aren't.

4. Handle retries

Webhooks retry on failure, so make your handler idempotent: key on the invoice ID and ignore one you've already processed. Send an Idempotency-Key when creating invoices so a retried upload doesn't create a second record.

Common questions

Is XML available?

No. Exports are CSV and JSON.

Is there an SDK?

A Node SDK, CLI and MCP server are coming soon. Today you call the REST API directly.

Sources

JSON (Wikipedia)

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Try it on your own invoices

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