Why does my Stream webhook parser fail when it expects a plain JSON request body?

Answered by ANPR AI·Sourced

Short answer

The documented request is multipart.

Explanation

Stream places JSON results in a form field and can attach image files.

Things to check

  • Content-Type
  • Form field parser
  • Enabled image uploads

What to do

Parse the documented multipart payload and decode its JSON field before reading plate results.

Source

Plate Recognizer Stream webhooks and output formats

Scope and version

Live reference; checked 3 October 2026

ANPR Edge

Skip the dedicated ANPR camera. Read plates from the cameras you already have.

ANPR Edge is plate-recognition software that runs on a PC at your site and works with ordinary IP cameras, so plate reads no longer depend on one vendor's camera, NVR or firmware.

  • Works with standard IP cameras over RTSP
  • One license per location covers every camera
  • Runs on a Windows PC or Mac you own

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