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HTTP 431

Request headers too large

The request's header block is larger than 16 KB.

"type": "https://ohlc.io/problems/headers-too-large"

Why it happens

  • Large cookies or proxy-added headers sent to the API host.
  • An oversized custom header.

How to fix it

  • Send only the headers the API needs, essentially Authorization and, for POST, Content-Type.

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