Others may be more familiar with tika-server and OCR, but I notice that we do process X-Tika-OCR prefixed headers to configure TesseractOCRConfig .  If you set "tesseractPath" to something bogus, that may turn off OCR...give something like this a try:

--header "X-Tika-OCRTesseractPath:/bogosity"

-----Original Message-----
From: Markus Mandalka [mailto:[EMAIL PROTECTED]]
Sent: Monday, April 9, 2018 11:00 AM
To: [EMAIL PROTECTED]
Subject: Tika Server: Disable OCR / Tesseract by HTTP parameter?

Hello,
is it possible to optional disable OCR (by Tesseract) in Tika Server by a HTTP / HEADER / POST / GET / REST-API parameter (i.e. for some but not all documents) instead of disable it global in tika.xml config or uninstall Tesseract like in the documentation https://wiki.apache.org/tika/TikaOCR ?
Best regards,

Markus