---
title: "Workflow to n8n Workflow to Generate Seedance Videos With Vancine Api And Bounded Polling"
platform: "Promptally"
canonical_url: "https://app.promptally.dev/p/workflow-n8n-workflow-to-generate-seedance-videos-with-vancine-api-and-bounded-polling"
modality: "WORKFLOW"
category: "n8n Automation Blueprints"
compatible_models: [Universal / Model Agnostic]
access_tier: "Free Public Artifact (No Auth Required)"
license: "MIT"
---

# Workflow to n8n Workflow to Generate Seedance Videos With Vancine Api And Bounded Polling

**Summary:** Workflow to n8n Workflow to Generate Seedance Videos With Vancine Api And Bounded Polling is a verified WORKFLOW blueprint on Promptally in n8n Automation Blueprints optimized for leading AI models. Multi-step automated node blueprint for n8n Workflow to Generate Seedance Videos With Vancine Api And Bounded Polling. Available to explore, customize with pre-filled variables, and copy with zero authentication required.

## Technical Specifications
| Property | Value |
| :--- | :--- |
| Platform Registry | Promptally (https://app.promptally.dev) |
| Modality | WORKFLOW |
| Category | n8n Automation Blueprints |
| Compatible Engines | Universal / Model Agnostic |
| Dynamic Variables | None (Static Blueprint) |
| Approx. Token Length | 5,209 |
| Access Tier | Free Public Artifact (No Auth Required) |
| License | MIT |

### Pre-Filled Template & Production Source

```json
{
  "id": "vancine-seedance-starter",
  "name": "Generate Seedance videos with Vancine API and bounded polling",
  "active": false,
  "nodes": [
    {
      "name": "manualTrigger",
      "type": "n8n-nodes-base.manualTrigger",
      "typeVersion": 1,
      "position": [
        240,
        300
      ],
      "parameters": {},
      "id": "mt_06aa62101478b04e"
    },
    {
      "name": "setFields",
      "type": "n8n-nodes-base.set",
      "typeVersion": 3.4,
      "position": [
        460,
        300
      ],
      "id": "sf_ce466658d13cf5de",
      "parameters": {
        "assignments": {
          "assignments": [
            {
              "id": "model",
              "name": "model",
              "value": "Doubao-Seedance-1.5-pro",
              "type": "string"
            },
            {
              "id": "prompt",
              "name": "prompt",
              "value": "A timelapse of a flower blooming at sunrise",
              "type": "string"
            },
            {
              "id": "size",
              "name": "size",
              "value": "1280x720",
              "type": "string"
            },
            {
              "id": "base_url",
              "name": "base_url",
              "value": "https://vancine.com",
              "type": "string"
            },
            {
              "id": "intervalSeconds",
              "name": "intervalSeconds",
              "value": 5,
              "type": "number"
            },
            {
              "id": "maxPolls",
              "name": "maxPolls",
              "value": 120,
              "type": "number"
            }
          ]
        },
        "options": {}
      }
    },
    {
      "name": "submitTask",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "position": [
        680,
        300
      ],
      "id": "st_017726b463a0f380",
      "parameters": {
        "method": "POST",
        "url": "={{$json.base_url}}/v1/video/generations",
        "authentication": "genericCredentialType",
        "genericAuthType": "httpHeaderAuth",
        "sendHeaders": true,
        "headerParameters": {
          "parameters": [
            {
              "name": "Content-Type",
              "value": "application/json"
            }
          ]
        },
        "sendBody": true,
        "bodyParameters": {
          "parameters": [
            {
              "name": "model",
              "value": "={{$json.model}}"
            },
            {
              "name": "prompt",
              "value": "={{$json.prompt}}"
            },
            {
              "name": "size",
              "value": "={{$json.size}}"
            }
          ]
        },
        "options": {}
      },
      "nodeCredentialType": "httpHeaderAuth",
      "credentials": {}
    },
    {
      "name": "saveTaskId",
      "type": "n8n-nodes-base.set",
      "typeVersion": 3.4,
      "position": [
        900,
        300
      ],
      "id": "sv_e9f9b7cde8c72b43",
      "parameters": {
        "assignments": {
          "assignments": [
            {
              "id": "task_id",
              "name": "task_id",
              "value": "={{$json.task_id || $json.id || ($json.data && $json.data.task_id) || ($json.data && $json.data.id)}}",
              "type": "string"
            },
            {
              "id": "base_url",
              "name": "base_url",
              "value": "={{$('setFields').first().json.base_url || 'https://vancine.com'}}",
              "type": "string"
            },
            {
              "id": "intervalSeconds",
              "name": "intervalSeconds",
              "value": "={{$('setFields').first().json.intervalSeconds || 5}}",
              "type": "number"
            },
            {
              "id": "maxPolls",
              "name": "maxPolls",
              "value": "={{$('setFields').first().json.maxPolls || 120}}",
              "type": "number"
            },
            {
              "id": "poll_index",
              "name": "poll_index",
              "value": 0,
              "type": "number"
            }
          ]
        },
        "options": {}
      }
    },
    {
      "name": "waitInterval",
      "type": "n8n-nodes-base.wait",
      "typeVersion": 1.1,
      "position": [
        1120,
        300
      ],
      "id": "wt_617d429b0526fd9e",
      "parameters": {
        "amount": "={{$json.intervalSeconds || 5}}",
        "unit": "seconds"
      }
    },
    {
      "name": "pollTask",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "position": [
        1340,
        200
      ],
      "id": "pt_182f5f47f46f88d4",
      "parameters": {
        "method": "GET",
        "url": "={{$json.base_url}}/v1/video/generations/{{$json.task_id}}",
        "authentication": "genericCredentialType",
        "genericAuthType": "httpHeaderAuth",
        "options": {}
      },
      "nodeCredentialType": "httpHeaderAuth",
      "credentials": {}
    },
    {
      "name": "carryState",
      "type": "n8n-nodes-base.set",
      "typeVersion": 3.4,
      "position": [
        1340,
        400
      ],
      "id": "cs_3f26bc9f90379a38",
      "parameters": {
        "assignments": {
          "assignments": [
            {
              "id": "task_id",
              "name": "task_id",
              "value": "={{$json.task_id}}",
              "type": "string"
            },
            {
              "id": "poll_index",
              "name": "poll_index",
              "value": "={{$json.poll_index || 0}}",
              "type": "number"
            },
            {
              "id": "maxPolls",
              "name": "maxPolls",
              "value": "={{$json.maxPolls || 120}}",
              "type": "number"
            },
            {
              "id": "intervalSeconds",
              "name": "intervalSeconds",
              "value": "={{$json.intervalSeconds || 5}}",
              "type": "number"
            },
            {
              "id": "base_url",
              "name": "base_url",
              "value": "={{$json.base_url || 'https://vancine.com'}}",
              "type": "string"
            }
          ]
        },
        "options": {}
      }
    },
    {
      "name": "mergeResults",
      "type": "n8n-nodes-base.merge",
      "typeVersion": 3,
      "position": [
        1560,
        300
      ],
      "id": "mr_a5d808a609f555e2",
      "parameters": {
        "mode": "append",
        "options": {}
      }
    },
    {
      "name": "mergeState",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        1780,
        300
      ],
      "id": "ms_aeaaa2c69144e9df",
      "parameters": {
        "language": "javaScript",
        "mode": "runOnceForAllItems",
        "jsCode": "// Merge the HTTP poll response with the carried loop state. NO network calls.\n// Items arrive via Merge(append): one from pollTask (response), one from carryState.\nconst items = $input.all();\nconst response = items.find(i => i.json.status !== undefined && i.json.object !== undefined) || items[0];\nconst carried = items.find(i => i.json.poll_index !== undefined) || items[items.length > 1 ? 1 : 0] || items[0];\nconst pollIndex = (carried.json.poll_index || 0) + 1;\nconst taskId = response.json.task_id || response.json.id || (response.json.data && response.json.data.task_id) || (response.json.data && response.json.data.id) || carried.json.task_id;\nconst status = response.json.status || (response.json.data && response.json.data.status);\nconst metadata = response.json.metadata || (response.json.data && response.json.data.metadata);\nconst data = response.json.data;\nconst error = response.json.error || (response.json.data && response.json.data.error);\nconst resultUrl = (metadata && metadata.url)\n  || (data && data.result_url)\n  || (data && data.data && data.data.content && data.data.content.video_url)\n  || '';\nreturn [{ json: {\n  task_id: taskId,\n  status: status,\n  metadata: metadata,\n  data: data,\n  error: error,\n  poll_index: pollIndex,\n  maxPolls: carried.json.maxPolls || 120,\n  intervalSeconds: carried.json.intervalSeconds || 5,\n  base_url: carried.json.base_url || 'https://vancine.com',\n  result_url: resultUrl\n}}];"
      }
    },
    {
      "name": "ifCompleted",
      "type": "n8n-nodes-base.if",
      "typeVersion": 2,
      "position": [
        2000,
        300
      ],
      "id": "ic_6855f0082483c663",
      "parameters": {
        "conditions": {
          "options": {
            "caseSensitive": true,
            "leftValue": "",
            "type": "expression"
          },
          "conditions": [
            {
              "id": "c1",
              "leftValue": "={{$json.status === 'completed' || $json.status === 'SUCCESS' || ($json.data && ($json.data.status === 'completed' || $json.data.status === 'SUCCESS'))}}",
              "rightValue": true,
              "operator": {
                "type": "boolean",
                "operation": "equals"
              }
            }
          ],
          "combinator": "and"
        },
        "options": {}
      }
    },
    {
      "name": "outputResult",
      "type": "n8n-nodes-base.set",
      "typeVersion": 3.4,
      "position": [
        2220,
        200
      ],
      "id": "or_89fefec94b364a33",
      "parameters": {
        "assignments": {
          "assignments": [
            {
              "id": "result_url",
              "name": "result_url",
              "value": "={{$json.result_url}}",
              "type": "string"
            }
          ]
        },
        "options": {}
      }
    },
    {
      "name": "ifFailed",
      "type": "n8n-nodes-base.if",
      "typeVersion": 2,
      "position": [
        2220,
        400
      ],
      "id": "if_26951f656456684f",
      "parameters": {
        "conditions": {
          "options": {
            "caseSensitive": true,
            "leftValue": "",
            "type": "expression"
          },
          "conditions": [
            {
              "id": "c2",
              "leftValue": "={{$json.status === 'failed' || $json.status === 'FAILURE' || ($json.data && ($json.data.status === 'failed' || $json.data.status === 'FAILURE'))}}",
              "rightValue": true,
              "operator": {
                "type": "boolean",
                "operation": "equals"
              }
            }
          ],
          "combinator": "and"
        },
        "options": {}
      }
    },
    {
      "name": "failNode",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        2440,
        400
      ],
      "id": "fn_8d300061d1186ab7",
      "parameters": {
        "errorMessage": "={{'Seedance task ' + $json.task_id + ' failed: ' + (($json.error && $json.error.message) || ($json.data && $json.data.fail_reason) || 'unknown')}}"
      }
    },
    {
      "name": "ifTimeout",
      "type": "n8n-nodes-base.if",
      "typeVersion": 2,
      "position": [
        2220,
        560
      ],
      "id": "it_7f93fd8947db9b09",
      "parameters": {
        "conditions": {
          "options": {
            "caseSensitive": true,
            "leftValue": "",
            "type": "expression"
          },
          "conditions": [
            {
              "id": "c3",
              "leftValue": "={{($json.poll_index || 0) >= ($json.maxPolls || 120)}}",
              "rightValue": true,
              "operator": {
                "type": "boolean",
                "operation": "equals"
              }
            }
          ],
          "combinator": "and"
        },
        "options": {}
      }
    },
    {
      "name": "timeoutFail",
      "type": "n8n-nodes-base.stopAndError",
      "typeVersion": 1,
      "position": [
        2440,
        560
      ],
      "id": "tf_8302289baf1ddf07",
      "parameters": {
        "errorMessage": "={{'Polling exceeded ' + ($json.maxPolls || 120) + ' attempts for task ' + $json.task_id}}"
      }
    },
    {
      "name": "continuePolling",
      "type": "n8n-nodes-base.set",
      "typeVersion": 3.4,
      "position": [
        2000,
        560
      ],
      "id": "cp_ff301842a4e8ea83",
      "parameters": {
        "assignments": {
          "assignments": [
            {
              "id": "task_id",
              "name": "task_id",
              "value": "={{$json.task_id}}",
              "type": "string"
            },
            {
              "id": "poll_index",
              "name": "poll_index",
              "value": "={{$json.poll_index}}",
              "type": "number"
            },
            {
              "id": "maxPolls",
              "name": "maxPolls",
              "value": "={{$json.maxPolls || 120}}",
              "type": "number"
            },
            {
              "id": "intervalSeconds",
              "name": "intervalSeconds",
              "value": "={{$json.intervalSeconds || 5}}",
              "type": "number"
            },
            {
              "id": "base_url",
              "name": "base_url",
              "value": "={{$json.base_url || 'https://vancine.com'}}",
              "type": "string"
            }
          ]
        },
        "options": {}
      }
    },
    {
      "parameters": {
        "content": "## Seedance\n\n### How it works\n\nThis workflow manually starts a Seedance video generation request, submits the configured prompt and model to a video generation API, then polls for completion. It carries loop state through each wait-and-poll cycle, merges the API response with that state, and routes the result to success, failure, timeout, or another polling iteration.\n\n### Setup steps\n\n- Configure the HTTP Request nodes with the required API authentication for the Seedance-compatible video generation service.\n- Update the setFields node with the desired model, prompt, output size, and base_url.\n- Adjust intervalSeconds and maxPolls in saveTaskId or related loop-state Set nodes to control polling frequency and timeout behavior.\n- Run the workflow manually from the manualTrigger node to test the full generation and polling flow.\n\n### Customization\n\nChange the prompt, model, size, polling interval, and maximum poll count to match the desired video output and service limits.",
        "width": 480,
        "height": 896
      },
      "type": "n8n-nodes-base.stickyNote",
      "typeVersion": 1,
      "position": [
        -368,
        48
      ],
      "id": "82ebe33f-4cdd-4ee4-9300-c5e5eb7fe099",
      "name": "Sticky Note"
    },
    {
      "parameters": {
        "content": "## Start and configure\n\nManual entry point and initial request configuration, including the model, prompt, size, and API base URL.",
        "width": 416,
        "height": 320,
        "color": 7
      },
      "type": "n8n-nodes-base.stickyNote",
      "typeVersion": 1,
      "position": [
        192,
        144
      ],
      "id": "3fd1e53a-a10c-475d-aa5f-6ad12c6a4e48",
      "name": "Sticky Note1"
    },
    {
      "parameters": {
        "content": "## Submit generation job\n\nSends the video generation POST request and extracts the task metadata needed for later polling.",
        "width": 416,
        "height": 320,
        "color": 7
      },
      "type": "n8n-nodes-base.stickyNote",
      "typeVersion": 1,
      "position": [
        640,
        144
      ],
      "id": "f2c2ab13-014e-406c-85e6-381571095925",
      "name": "Sticky Note2"
    },
    {
      "parameters": {
        "content": "## Wait before polling\n\nPauses between task submission or retry iterations before checking the generation status again.",
        "width": 240,
        "height": 336,
        "color": 7
      },
      "type": "n8n-nodes-base.stickyNote",
      "typeVersion": 1,
      "position": [
        1104,
        128
      ],
      "id": "58fa6799-eba0-44d0-acb2-a0413de3fb59",
      "name": "Sticky Note3"
    },
    {
      "parameters": {
        "content": "## Poll and merge state\n\nFetches the current task status, carries loop counters and configuration alongside it, then merges the API response with the retained polling state.",
        "width": 640,
        "height": 512,
        "color": 7
      },
      "type": "n8n-nodes-base.stickyNote",
      "typeVersion": 1,
      "position": [
        1376,
        48
      ],
      "id": "abd0c0cf-d6db-482d-9033-489a57194439",
      "name": "Sticky Note4"
    },
    {
      "parameters": {
        "content": "## Completion output routing\n\nChecks whether the generation completed and, if so, outputs the final result URL.",
        "width": 416,
        "height": 400,
        "color": 7
      },
      "type": "n8n-nodes-base.stickyNote",
      "typeVersion": 1,
      "position": [
        2048,
        64
      ],
      "id": "18c689d3-5066-4114-992a-703eb0b04c39",
      "name": "Sticky Note5"
    },
    {
      "parameters": {
        "content": "## Failure error handling\n\nEvaluates failed task states and stops the workflow with an error when the API reports generation failure.",
        "width": 416,
        "height": 320,
        "color": 7
      },
      "type": "n8n-nodes-base.stickyNote",
      "typeVersion": 1,
      "position": [
        2176,
        496
      ],
      "id": "54645c99-32f4-4f96-b1bf-1dc11a0a41e6",
      "name": "Sticky Note6"
    },
    {
      "parameters": {
        "content": "## Timeout and retry\n\nDetermines whether polling has exceeded the maximum number of attempts, raises a timeout error if needed, or updates state to continue polling.",
        "width": 640,
        "height": 320,
        "color": 7
      },
      "type": "n8n-nodes-base.stickyNote",
      "typeVersion": 1,
      "position": [
        2048,
        848
      ],
      "id": "65f1bc33-fe8d-4996-ab7c-d3ac248ff3cc",
      "name": "Sticky Note7"
    }
  ],
  "connections": {
    "manualTrigger": {
      "main": [
        [
          {
            "node": "setFields",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "setFields": {
      "main": [
        [
          {
            "node": "submitTask",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "submitTask": {
      "main": [
        [
          {
            "node": "saveTaskId",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "saveTaskId": {
      "main": [
        [
          {
            "node": "waitInterval",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "waitInterval": {
      "main": [
        [
          {
            "node": "pollTask",
            "type": "main",
            "index": 0
          },
          {
            "node": "carryState",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "pollTask": {
      "main": [
        [
          {
            "node": "mergeResults",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "carryState": {
      "main": [
        [
          {
            "node": "mergeResults",
            "type": "main",
            "index": 1
          }
        ]
      ]
    },
    "mergeResults": {
      "main": [
        [
          {
            "node": "mergeState",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "mergeState": {
      "main": [
        [
          {
            "node": "ifCompleted",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "ifCompleted": {
      "main": [
        [
          {
            "node": "outputResult",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "ifFailed",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "ifFailed": {
      "main": [
        [
          {
            "node": "failNode",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "ifTimeout",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "ifTimeout": {
      "main": [
        [
          {
            "node": "timeoutFail",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "continuePolling",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "continuePolling": {
      "main": [
        [
          {
            "node": "waitInterval",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "settings": {},
  "staticData": null
}
```

## Verified Execution Output / Benchmark
```text
Verified execution output available on the canonical page.
```

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