{
  "openapi": "3.1.0",
  "info": {
    "title": "YouTube Video Captions API (V1)",
    "version": "v0",
    "description": "Retrieve available caption tracks for a YouTube video or request captions in SRT, XML, JSON3, or plain-text format. Use it to support transcription, accessibility, localization, or text analysis."
  },
  "servers": [
    {
      "url": "https://api.justoneapi.com",
      "description": "Global production API (default)"
    }
  ],
  "tags": [
    {
      "name": "YouTube",
      "description": "YouTube channel uploads and video details for content indexing, creator monitoring, and media analysis.",
      "x-platform-id": "youtube",
      "x-platform-aliases": [
        "YouTube",
        "油管"
      ],
      "x-platform-detection-aliases": [
        "YouTube",
        "油管"
      ]
    }
  ],
  "paths": {
    "/api/youtube/get-video-captions/v1": {
      "get": {
        "tags": [
          "YouTube"
        ],
        "summary": "Video Captions",
        "description": "Retrieve available caption tracks for a YouTube video or request captions in SRT, XML, JSON3, or plain-text format. Use it to support transcription, accessibility, localization, or text analysis.",
        "operationId": "getApiYoutubeGetVideoCaptionsV1",
        "parameters": [
          {
            "name": "token",
            "in": "query",
            "description": "Access token for this API service.",
            "required": true,
            "schema": {
              "type": "string"
            }
          },
          {
            "name": "videoId",
            "in": "query",
            "description": "The unique identifier for a YouTube video.",
            "required": true,
            "schema": {
              "type": "string"
            }
          },
          {
            "name": "languageCode",
            "in": "query",
            "description": "Caption language code, such as en, zh-Hans, or a.en. Leave it empty to retrieve available caption tracks.",
            "required": false,
            "schema": {
              "type": "string",
              "default": ""
            }
          },
          {
            "name": "format",
            "in": "query",
            "description": "Caption output format.\n\nAvailable Values:\n- `srt`: SubRip caption format with timeline cues\n- `xml`: Original XML caption format\n- `json3`: YouTube original JSON caption structure\n- `txt`: Plain text without timeline cues",
            "required": false,
            "schema": {
              "type": "string",
              "default": "srt",
              "description": "YouTube caption output format",
              "enum": [
                "srt",
                "xml",
                "json3",
                "txt"
              ]
            }
          }
        ],
        "responses": {
          "200": {
            "description": "OK",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
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                    },
                    "message": {
                      "type": [
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                      ]
                    },
                    "data": {},
                    "recordTime": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "requestId": {
                      "type": "string"
                    }
                  },
                  "required": [
                    "code",
                    "data",
                    "message",
                    "recordTime"
                  ]
                }
              }
            }
          },
          "400": {
            "description": "Invalid request parameters or body",
            "content": {
              "application/json": {
                "schema": {
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                  "properties": {
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                    "message": {
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                    "data": {},
                    "recordTime": {
                      "type": [
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                      ]
                    },
                    "requestId": {
                      "type": "string"
                    }
                  },
                  "required": [
                    "code",
                    "data",
                    "message",
                    "recordTime"
                  ]
                }
              }
            }
          },
          "401": {
            "description": "Invalid or inactive access token",
            "content": {
              "application/json": {
                "schema": {
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                  "properties": {
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                    "message": {
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                        "null"
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                    },
                    "data": {},
                    "recordTime": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "requestId": {
                      "type": "string"
                    }
                  },
                  "required": [
                    "code",
                    "data",
                    "message",
                    "recordTime"
                  ]
                }
              }
            }
          },
          "403": {
            "description": "Permission denied",
            "content": {
              "application/json": {
                "schema": {
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                  "properties": {
                    "code": {
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                    "message": {
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                    },
                    "data": {},
                    "recordTime": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "requestId": {
                      "type": "string"
                    }
                  },
                  "required": [
                    "code",
                    "data",
                    "message",
                    "recordTime"
                  ]
                }
              }
            }
          },
          "429": {
            "description": "Request rate or daily quota limit exceeded",
            "content": {
              "application/json": {
                "schema": {
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                  "properties": {
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                    "data": {},
                    "recordTime": {
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                  "required": [
                    "code",
                    "data",
                    "message",
                    "recordTime"
                  ]
                }
              }
            }
          },
          "500": {
            "description": "Internal server error",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "code": {
                      "type": "integer",
                      "format": "int32",
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                    "message": {
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                    "data": {},
                    "recordTime": {
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                    "requestId": {
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                    }
                  },
                  "required": [
                    "code",
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                    "message",
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                }
              }
            }
          },
          "503": {
            "description": "Service temporarily unavailable",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "code": {
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                      "format": "int32",
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                  "required": [
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            }
          }
        },
        "x-order": "25001002",
        "x-api-version": "v1",
        "x-search-aliases": [
          "YouTube video captions",
          "YouTube subtitles",
          "YouTube caption tracks",
          "YouTube视频字幕",
          "YouTube字幕文件",
          "YouTube字幕轨道"
        ],
        "x-highlights": [],
        "x-endpoint-family": "youtube_get_video_captions"
      }
    }
  }
}