Help Center/ Optical Character Recognition/ FAQs/ Token-based Authentication/ Why Does the Header Overflow When I Use Postman to Call an OCR API?

Updated on 2025-10-23 GMT+08:00

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Why Does the Header Overflow When I Use Postman to Call an OCR API?

When an API is used to call Postman to obtain a token for authentication, if the error message "Error:Header overflow" is displayed, the header overflows. In this case, perform the following operations to rectify the fault:

Upgrade the Postman version, as earlier versions may have compatibility issues. You are advised to select a Postman version that supports headers larger than 32 KB. You can download and install the latest version from the official website (https://www.postman.com/).

Parent topic: Token-based Authentication

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