curl --request POST \
  --url https://app.teable.ai/api/base/%7BbaseId%7D/chat/text-extract \
  --header 'Authorization: Bearer REPLACE_BEARER_TOKEN' \
  --header 'content-type: application/json' \
  --data '{"attachments":[{"token":"string","name":"string","mimetype":"string","size":0,"path":"string","presignedUrl":"string"}]}'

{
  "success": true,
  "extractedFiles": [
    {
      "token": "<string>",
      "content": "<string>",
      "charCount": 123,
      "truncated": true,
      "name": "<string>",
      "isPreview": true
    }
  ],
  "totalCharacters": 123,
  "truncatedFiles": 123,
  "message": "<string>",
  "error": "<string>"
}