Null Response from Compliance API – Need Help Debugging

FATOORA portal and Simulation portal
1

Hi everyone,

I’m testing invoice submission in developer mode via the Compliance API.
Instead of using the CLI SDK, I’m calling the API directly online.

Scenario

  • I’m submitting multiple invoice types at the same time:
    • Standard Invoice
    • Simplified Invoice
    • Standard Credit Note
    • Simplified Credit Note
    • Standard Debit Note
    • Simplified Debit Note

Each XML is generated according to the UBL 2.1 / EN16931 structure, with placeholders for PIH, QR, and proper ProfileID / CustomizationID values.

API Call Details

  • Endpoint:
    https://gw-fatoora.zatca.gov.sa/e-invoicing/developer-portal/compliance/invoices

  • Headers:
    Authorization: Basic CSID:Secret
    Content-Type: application/json
    Accept-Version: v2
    Accept-Language: en

yaml
Copy code

  • Payload format:
    A JSON object with "invoices": [ { "base64invoice": "<base64 XML>" }, ... ]
    (sending multiple documents in one request).

Problem

  • The request returns HTTP 400.
  • The response body is null/empty.
  • No validation error messages, no compliance rejection info.

What I’ve Verified

  • Each XML passes the web validator individually.
  • CSID + secret are valid and tested on other endpoints.
  • Testing via API only — not using the CLI SDK locally.

Questions for the community

  1. Is bulk submission of multiple invoice types supported in the Developer API?
  2. Should I submit them one by one instead of batching?
  3. Has anyone else experienced empty/null responses in developer mode?
  4. Is there any way to view sandbox compliance logs for failed submissions?

Any guidance or shared experience would be highly appreciated :folded_hands:

2

I don’t think you can send multiple invoices in one api . so bulk submission is not supported . try to send invoices one by one