# Kling v2.6 Text-to-Video

> Video Generation

Submit an asynchronous text-to-video generation task for the
`kling-v2-6` model. Kling v2.6 does not support audio-video generation
parameters such as `voice_list` or `sound`.

## Endpoint

`POST https://api.modelverse.cn/v1/tasks/submit`

## Request Body

## Responses

- **200** — Task submitted successfully.
- **400** — Invalid request parameters.
- **401** — Invalid or missing bearer token.
- **default** — Error response.

## OpenAPI Definition

```json
{
  "openapi": "3.1.0",
  "x-language": "en-US",
  "info": {
    "title": "ModelVerse Kling/v2.6-T2V Video Task API",
    "version": "1.0.0",
    "description": "Self-contained OpenAPI 3.1 schema for the ModelVerse Kling/v2.6-T2V\ntext-to-video asynchronous task API.\n"
  },
  "servers": [
    {
      "url": "https://api.modelverse.cn",
      "description": "ModelVerse API endpoint documented for this model."
    }
  ],
  "tags": [
    {
      "name": "Kling/v2.6-T2V",
      "description": "Text-to-video asynchronous task operations for Kling/v2.6-T2V."
    }
  ],
  "paths": {
    "/v1/tasks/submit": {
      "post": {
        "tags": [
          "Kling/v2.6-T2V"
        ],
        "operationId": "submitKlingV26T2VTask",
        "summary": "Kling v2.6 Text-to-Video",
        "description": "Submit an asynchronous text-to-video generation task for the\n`kling-v2-6` model. Kling v2.6 does not support audio-video generation\nparameters such as `voice_list` or `sound`.\n",
        "security": [
          {
            "bearerAuth": []
          }
        ],
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "$ref": "#/components/schemas/KlingV26T2VSubmitRequest"
              },
              "examples": {
                "documented": {
                  "summary": "Source text-to-video request",
                  "value": {
                    "model": "kling-v2-6",
                    "input": {
                      "prompt": "A beautiful girl is dancing in a garden"
                    },
                    "parameters": {
                      "mode": "pro",
                      "aspect_ratio": "16:9",
                      "duration": 5
                    }
                  }
                },
                "withNegativePrompt": {
                  "summary": "Text-to-video request with optional negative prompt",
                  "value": {
                    "model": "kling-v2-6",
                    "input": {
                      "prompt": "A cinematic garden dance at golden hour with flowing camera motion",
                      "negative_prompt": "blurry, distorted, low quality"
                    },
                    "parameters": {
                      "mode": "pro",
                      "aspect_ratio": "9:16",
                      "duration": 10
                    }
                  }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Task submitted successfully.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/KlingV26T2VSubmitResponse"
                },
                "examples": {
                  "submitted": {
                    "summary": "Submitted task",
                    "value": {
                      "output": {
                        "task_id": "task_id"
                      },
                      "request_id": "request_id"
                    }
                  }
                }
              }
            }
          },
          "400": {
            "description": "Invalid request parameters.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/KlingV26T2VErrorResponse"
                },
                "examples": {
                  "paramError": {
                    "$ref": "#/components/examples/KlingV26T2VParamError"
                  }
                }
              }
            }
          },
          "401": {
            "description": "Invalid or missing bearer token.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/KlingV26T2VErrorResponse"
                },
                "examples": {
                  "authError": {
                    "$ref": "#/components/examples/KlingV26T2VAuthError"
                  }
                }
              }
            }
          },
          "default": {
            "description": "Error response.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/KlingV26T2VErrorResponse"
                },
                "examples": {
                  "error": {
                    "$ref": "#/components/examples/KlingV26T2VParamError"
                  }
                }
              }
            }
          }
        }
      }
    },
    "/v1/tasks/status": {
      "get": {
        "tags": [
          "Kling/v2.6-T2V"
        ],
        "operationId": "getKlingV26T2VTaskStatus",
        "summary": "Kling v2.6 Text-to-Video Status",
        "description": "Query the status and result URLs for an asynchronous text-to-video task.",
        "security": [
          {
            "bearerAuth": []
          }
        ],
        "parameters": [
          {
            "name": "task_id",
            "in": "query",
            "required": true,
            "description": "Asynchronous task identifier returned by `/v1/tasks/submit`.",
            "schema": {
              "type": "string"
            },
            "examples": {
              "documented": {
                "summary": "Source documentation placeholder",
                "value": "task_id"
              }
            }
          }
        ],
        "responses": {
          "200": {
            "description": "Task status response.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/KlingV26T2VStatusResponse"
                },
                "examples": {
                  "success": {
                    "summary": "Successful task",
                    "value": {
                      "output": {
                        "task_id": "task_id",
                        "task_status": "Success",
                        "urls": [
                          "https://xxxxx/xxxx.mp4"
                        ],
                        "submit_time": 1756959000,
                        "finish_time": 1756959050
                      },
                      "usage": {
                        "duration": 5
                      },
                      "request_id": ""
                    }
                  },
                  "failure": {
                    "summary": "Failed task",
                    "value": {
                      "output": {
                        "task_id": "task_id",
                        "task_status": "Failure",
                        "submit_time": 1756959000,
                        "finish_time": 1756959019,
                        "error_message": "error_message"
                      },
                      "usage": {
                        "duration": 5
                      },
                      "request_id": ""
                    }
                  }
                }
              }
            }
          },
          "400": {
            "description": "Invalid task identifier or request parameters.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/KlingV26T2VErrorResponse"
                },
                "examples": {
                  "paramError": {
                    "$ref": "#/components/examples/KlingV26T2VParamError"
                  }
                }
              }
            }
          },
          "401": {
            "description": "Invalid or missing bearer token.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/KlingV26T2VErrorResponse"
                },
                "examples": {
                  "authError": {
                    "$ref": "#/components/examples/KlingV26T2VAuthError"
                  }
                }
              }
            }
          },
          "default": {
            "description": "Error response.",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/KlingV26T2VErrorResponse"
                },
                "examples": {
                  "error": {
                    "$ref": "#/components/examples/KlingV26T2VParamError"
                  }
                }
              }
            }
          }
        }
      }
    }
  },
  "components": {
    "securitySchemes": {
      "bearerAuth": {
        "type": "http",
        "scheme": "bearer",
        "bearerFormat": "API key",
        "description": "ModelVerse API key sent as `Authorization: Bearer <YOUR_API_KEY>`."
      }
    },
    "schemas": {
      "KlingV26T2VSubmitRequest": {
        "type": "object",
        "additionalProperties": false,
        "required": [
          "model",
          "input"
        ],
        "properties": {
          "model": {
            "type": "string",
            "const": "kling-v2-6",
            "description": "Model name. This schema is pinned to `kling-v2-6`."
          },
          "input": {
            "$ref": "#/components/schemas/KlingV26T2VInput"
          },
          "parameters": {
            "$ref": "#/components/schemas/KlingV26T2VParameters"
          }
        }
      },
      "KlingV26T2VInput": {
        "type": "object",
        "additionalProperties": false,
        "required": [
          "prompt"
        ],
        "properties": {
          "prompt": {
            "type": "string",
            "minLength": 1,
            "description": "Prompt used to guide video generation.",
            "examples": [
              "A beautiful girl is dancing in a garden"
            ]
          },
          "negative_prompt": {
            "type": "string",
            "description": "Negative prompt used to limit undesired content.",
            "examples": [
              "blurry, distorted, low quality"
            ]
          }
        }
      },
      "KlingV26T2VParameters": {
        "type": "object",
        "additionalProperties": false,
        "properties": {
          "mode": {
            "type": "string",
            "enum": [
              "pro"
            ],
            "default": "pro",
            "description": "Generation mode. The source parameter table mentions `std` and\n`pro`, but notes that Kling v2.6 currently supports only `pro`.\n"
          },
          "aspect_ratio": {
            "type": "string",
            "description": "Generated video aspect ratio.",
            "enum": [
              "16:9",
              "9:16",
              "1:1"
            ]
          },
          "duration": {
            "type": "integer",
            "description": "Generated video duration in seconds.",
            "enum": [
              5,
              10
            ],
            "default": 5
          }
        }
      },
      "KlingV26T2VSubmitResponse": {
        "type": "object",
        "additionalProperties": false,
        "required": [
          "output",
          "request_id"
        ],
        "properties": {
          "output": {
            "type": "object",
            "additionalProperties": false,
            "required": [
              "task_id"
            ],
            "properties": {
              "task_id": {
                "type": "string",
                "description": "Unique identifier of the asynchronous task."
              }
            }
          },
          "request_id": {
            "type": "string",
            "description": "Unique request identifier."
          }
        }
      },
      "KlingV26T2VStatusResponse": {
        "type": "object",
        "additionalProperties": false,
        "required": [
          "output",
          "request_id"
        ],
        "properties": {
          "output": {
            "$ref": "#/components/schemas/KlingV26T2VStatusOutput"
          },
          "usage": {
            "$ref": "#/components/schemas/KlingV26T2VUsage"
          },
          "request_id": {
            "type": "string",
            "description": "Unique request identifier."
          }
        }
      },
      "KlingV26T2VStatusOutput": {
        "type": "object",
        "additionalProperties": false,
        "required": [
          "task_id",
          "task_status"
        ],
        "properties": {
          "task_id": {
            "type": "string",
            "description": "Unique identifier of the asynchronous task."
          },
          "task_status": {
            "$ref": "#/components/schemas/KlingV26T2VTaskStatus"
          },
          "urls": {
            "type": "array",
            "description": "Video result URL list.",
            "items": {
              "type": "string",
              "format": "uri"
            }
          },
          "submit_time": {
            "type": "integer",
            "format": "int64",
            "description": "Task submission timestamp."
          },
          "finish_time": {
            "type": "integer",
            "format": "int64",
            "description": "Task completion timestamp."
          },
          "error_message": {
            "type": "string",
            "description": "Error message returned when the task fails."
          }
        }
      },
      "KlingV26T2VTaskStatus": {
        "type": "string",
        "description": "Asynchronous task status.",
        "enum": [
          "Pending",
          "Running",
          "Success",
          "Failure"
        ]
      },
      "KlingV26T2VUsage": {
        "type": "object",
        "additionalProperties": false,
        "properties": {
          "duration": {
            "type": "integer",
            "description": "Generated video duration in seconds."
          }
        }
      },
      "KlingV26T2VErrorResponse": {
        "type": "object",
        "additionalProperties": true,
        "required": [
          "error"
        ],
        "properties": {
          "error": {
            "$ref": "#/components/schemas/KlingV26T2VErrorObject"
          },
          "request_id": {
            "type": "string",
            "description": "Unique request identifier, if available."
          }
        }
      },
      "KlingV26T2VErrorObject": {
        "type": "object",
        "additionalProperties": true,
        "required": [
          "message",
          "type"
        ],
        "properties": {
          "message": {
            "type": "string",
            "description": "Error message."
          },
          "type": {
            "type": "string",
            "description": "Error type.",
            "examples": [
              "invalid_request_error"
            ]
          },
          "code": {
            "type": [
              "string",
              "null"
            ],
            "description": "Error code.",
            "examples": [
              "param_error",
              "auth_error"
            ]
          },
          "param": {
            "type": [
              "string",
              "null"
            ],
            "description": "Related request parameter, if any."
          }
        }
      }
    },
    "examples": {
      "KlingV26T2VParamError": {
        "summary": "Invalid parameter error",
        "value": {
          "error": {
            "message": "Invalid param",
            "type": "invalid_request_error",
            "code": "param_error",
            "param": "parameters.duration"
          },
          "request_id": "request_id"
        }
      },
      "KlingV26T2VAuthError": {
        "summary": "Bearer authentication error",
        "value": {
          "error": {
            "message": "Validate Certification failed",
            "type": "invalid_request_error",
            "code": "auth_error",
            "param": null
          },
          "request_id": "request_id"
        }
      }
    }
  }
}
```