{
  "openapi": "3.1.0",
  "info": {
    "title": "SeedRouter Kling 3.0",
    "version": "1.0.0",
    "description": "Kling 3.0 video from text or a first and last frame, with optional native sound, multi-shot prompts and elements. Asynchronous task delivery; media by URL only; callbacks are not offered; tasks cannot be cancelled."
  },
  "servers": [
    {
      "url": "https://api.seedrouter.ai/v1"
    }
  ],
  "security": [
    {
      "bearerAuth": []
    }
  ],
  "paths": {
    "/videos/generations": {
      "post": {
        "summary": "Create a video generation task",
        "operationId": "createVideoTask",
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "$ref": "#/components/schemas/VideoRequest"
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Accepted. Poll the returned id; no video is returned by this call.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/TaskAccepted"
                }
              }
            }
          },
          "400": {
            "description": "Public error; no infrastructure details.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/ErrorResponse"
                }
              }
            }
          },
          "401": {
            "description": "Public error; no infrastructure details.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/ErrorResponse"
                }
              }
            }
          },
          "402": {
            "description": "Public error; no infrastructure details.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/ErrorResponse"
                }
              }
            }
          },
          "403": {
            "description": "Public error; no infrastructure details.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/ErrorResponse"
                }
              }
            }
          },
          "429": {
            "description": "Public error; no infrastructure details.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/ErrorResponse"
                }
              }
            }
          },
          "503": {
            "description": "Public error; no infrastructure details.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/ErrorResponse"
                }
              }
            }
          }
        }
      }
    },
    "/tasks/{task_id}": {
      "get": {
        "summary": "Read an owned image task",
        "operationId": "getImageTask",
        "parameters": [
          {
            "name": "task_id",
            "in": "path",
            "required": true,
            "schema": {
              "type": "string",
              "pattern": "^task_[A-Za-z0-9]{1,64}$"
            }
          }
        ],
        "responses": {
          "200": {
            "description": "Processing, completed or failed task. Polling timeout is not a task failure.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/Task"
                }
              }
            }
          },
          "401": {
            "description": "Public error; no infrastructure details.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/ErrorResponse"
                }
              }
            }
          },
          "403": {
            "description": "Public error; no infrastructure details.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/ErrorResponse"
                }
              }
            }
          },
          "404": {
            "description": "Public error; no infrastructure details.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/ErrorResponse"
                }
              }
            }
          }
        }
      }
    }
  },
  "components": {
    "securitySchemes": {
      "bearerAuth": {
        "type": "http",
        "scheme": "bearer"
      }
    },
    "schemas": {
      "VideoRequest": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "type": "object",
        "properties": {
          "model": {
            "type": "string",
            "const": "kling-3-0"
          },
          "prompt": {
            "type": "string",
            "maxLength": 2500,
            "description": "Required for a single shot; optional with multi_shots. Up to 2500 characters."
          },
          "image_urls": {
            "maxItems": 2,
            "type": "array",
            "items": {
              "type": "string",
              "format": "uri"
            },
            "description": "Up to 2 public http(s) image URLs: the first frame, then the last frame. Base64 is not accepted."
          },
          "sound": {
            "type": "boolean",
            "default": false,
            "description": "Generate native sound."
          },
          "duration": {
            "type": "integer",
            "minimum": 3,
            "maximum": 15,
            "default": 5,
            "description": "3–15 seconds. Not used with multi_shots, where the shots set the length."
          },
          "aspect_ratio": {
            "type": "string",
            "enum": [
              "16:9",
              "9:16",
              "1:1"
            ],
            "default": "16:9"
          },
          "mode": {
            "type": "string",
            "enum": [
              "std",
              "pro",
              "4K"
            ],
            "default": "pro"
          },
          "multi_shots": {
            "type": "boolean",
            "default": false
          },
          "multi_prompt": {
            "maxItems": 5,
            "type": "array",
            "items": {
              "type": "object",
              "properties": {
                "prompt": {
                  "type": "string",
                  "maxLength": 500
                },
                "duration": {
                  "type": "integer",
                  "minimum": 1,
                  "maximum": 12
                }
              },
              "required": [
                "prompt",
                "duration"
              ],
              "additionalProperties": false
            },
            "description": "Up to 5 shots of 1–12 seconds each; required with multi_shots, where the durations must add up to 3–15 seconds."
          },
          "kling_elements": {
            "maxItems": 3,
            "type": "array",
            "items": {
              "type": "object",
              "properties": {
                "name": {
                  "type": "string",
                  "minLength": 1
                },
                "description": {
                  "type": "string"
                },
                "element_input_urls": {
                  "minItems": 2,
                  "maxItems": 4,
                  "type": "array",
                  "items": {
                    "type": "string",
                    "format": "uri"
                  }
                }
              },
              "required": [
                "name",
                "description",
                "element_input_urls"
              ],
              "additionalProperties": false
            },
            "description": "Up to 3 elements to keep consistent; mention each by name in the prompt."
          }
        },
        "required": [
          "model"
        ],
        "additionalProperties": false
      },
      "TaskAccepted": {
        "type": "object",
        "required": [
          "id",
          "model",
          "status",
          "created_at"
        ],
        "properties": {
          "id": {
            "type": "string"
          },
          "model": {
            "enum": [
              "kling-3-0"
            ]
          },
          "status": {
            "const": "processing"
          },
          "created_at": {
            "type": "integer"
          }
        }
      },
      "Task": {
        "type": "object",
        "required": [
          "id",
          "model",
          "status",
          "created_at"
        ],
        "properties": {
          "id": {
            "type": "string"
          },
          "model": {
            "enum": [
              "kling-3-0"
            ]
          },
          "status": {
            "enum": [
              "processing",
              "completed",
              "failed"
            ]
          },
          "created_at": {
            "type": "integer"
          },
          "finished_at": {
            "type": "integer"
          },
          "output": {
            "type": "object",
            "properties": {
              "video_url": {
                "type": "string",
                "format": "uri"
              }
            }
          },
          "error": {
            "$ref": "#/components/schemas/Error"
          }
        }
      },
      "Error": {
        "type": "object",
        "required": [
          "code",
          "message"
        ],
        "properties": {
          "code": {
            "type": "integer",
            "enum": [
              10001,
              10002,
              20001,
              20002,
              30001,
              30002,
              50001,
              50002,
              50003,
              60001,
              60002,
              60003,
              60004,
              90001
            ]
          },
          "message": {
            "type": "string"
          }
        }
      },
      "ErrorResponse": {
        "type": "object",
        "properties": {
          "error": {
            "$ref": "#/components/schemas/Error"
          }
        }
      }
    }
  }
}