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Track & Cancel Async API Tasks by Task ID
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Some Model Studio models (like image and video generation) use asynchronous invocation due to long processing times. The typical workflow is: create a task to get an ID, then query the result using that ID. Model Studio provides general-purpose task APIs to query individual results, check multiple task statuses in batch, and cancel queued tasks.
Prerequisites
You can call the asynchronous task APIs over HTTP.
Before you call the APIs, get and configure an API key, and then set the API key as an environment variable.
Query the result of an asynchronous task
API description: Queries the status and result of a task based on its task_id.
Rate limit: 20 QPS per Alibaba Cloud account (includes all RAM users).
Important
You can query all tasks under the Alibaba Cloud account that owns the current API key, including tasks submitted with any API key under that account. You cannot query tasks from other accounts.
Completed tasks are retained for 24 hours (check specific task API reference for exact period). After expiration, the system automatically deletes task data.
Request endpoint
http
GET https://dashscope.aliyuncs.com/api/v1/tasks/{task_id}Request parameters
| Parameter passing | Field | Type | Required | Description | Example |
|---|
| Parameter passing | Field | Type | Required | Description | Example |
| Header | Authorization | String | Yes | API key in the format Bearer sk-xxx | Bearer sk-xxx |
| Path | task_id | String | Yes | The task ID to query. | a8532587-xxxx-xxxx-xxxx-0c46b17950d1 |
Response parameters
| Field | Type | Description | Example |
|---|
| Field | Type | Description | Example |
| request_id | String | The unique ID for this request. | 7574ee8f-xxxx-xxxx-xxxx-11c33ab46e51 |
| output | Object | - If the task succeeds, output contains the result object generated by the model. The content varies by task type. - If the task fails or partially fails, output returns the code and message fields that explain the failure reason. - For tasks with multiple subtasks, output may contain both successful subtask results and error messages for failed ones. | - |
| output.task_id | String | The ID of the queried task. | a8532587-xxxx-xxxx-xxxx-0c46b17950d1 |
| output.task_status | String | The task status. - For multi-subtask tasks, the task succeeds if at least one subtask succeeds. - Failed subtasks show specific errors in the output. | Task status: - PENDING - RUNNING - SUCCEEDED - FAILED - UNKNOWN |
| output.submit_time | String | The time the task was submitted. | 2023-12-20 21:36:31.896 |
| output.scheduled_time | String | The time the task was scheduled (when it started running). | 2023-12-20 21:36:39.009 |
| output.end_time | String | The time the task ended. | 2023-12-20 21:36:45.913 |
| output.code | String | The error code (returned only when the task fails). | - |
| output.message | String | The error message (returned only when the task fails). | - |
| output.task_metrics | Object | Task metrics including subtask status statistics. | { "TOTAL": 4, // Total number of subtasks "SUCCEEDED": 3, // Number of successful subtasks "FAILED": 1 // Number of failed subtasks } |
| usage | Object | The billing information for this request (varies by task). | "usage": {"image_count": 1} |
Request example
curl
curl -X GET 'https://dashscope.aliyuncs.com/api/v1/tasks/73205176-xxxx-xxxx-xxxx-16bd5d902219' \
--header "Authorization: Bearer $DASHSCOPE_API_KEY"Note
If $DASHSCOPE_API_KEY is not set as an environment variable, replace it with your actual API key (format: Bearer sk-xxx).
Response example
json
{
"request_id": "45ac7f13-xxxx-xxxx-xxxx-e03c35068d83",
"output": {
"task_id": "73205176-xxxx-xxxx-xxxx-16bd5d902219",
"task_status": "SUCCEEDED",
"submit_time": "2023-12-20 21:36:31.896",
"scheduled_time": "2023-12-20 21:36:39.009",
"end_time": "2023-12-20 21:36:45.913",
"results": [\
{\
"url": "https://dashscope-result-bj.oss-cn-beijing.aliyuncs.com/xxx1.png"\
},\
{\
"url": "https://dashscope-result-bj.oss-cn-beijing.aliyuncs.com/xxx2.png"\
},\
{\
"url": "https://dashscope-result-bj.oss-cn-beijing.aliyuncs.com/xxx3.png"\
},\
{\
"code": "DataInspectionFailed",\
"message": "Output data may contain inappropriate content.",\
}\
],
"task_metrics": {
"TOTAL": 4,
"SUCCEEDED": 3,
"FAILED": 1
}
},
"usage": {
"image_count": 3
}
}Query the status of multiple asynchronous tasks
API description: Query multiple asynchronous tasks using various conditions. Check multiple task statuses in a single request.
Rate limit: 20 QPS per Alibaba Cloud account (includes all RAM users).
Important
You can query all tasks under the Alibaba Cloud account that owns the current API key, including tasks submitted with any API key under that account. You cannot query tasks from other accounts.
After the retention period expires, the system deletes the task, and its data becomes unqueryable.
Request endpoint
http
GET https://dashscope.aliyuncs.com/api/v1/tasks/Request parameters
| Parameter passing | Field | Type | Required | Description | Example |
|---|
| Parameter passing | Field | Type | Required | Description | Example |
| Header | Authorization | String | Yes | The API key, in the format Bearer sk-xxx. | Bearer sk-xxx |
| Params | task_id | String | No | The task ID to query. Specify a task_id to return only that task's status, or omit it to query multiple tasks. | a8532587-xxxx-xxxx-xxxx-0c46b17950d1 |
| start_time | String | No | Query start time in the format YYYYMMDDhhmmss. Defaults to 24 hours before end_time (if end_time is specified), or to the last 24 hours (if neither time is specified). Maximum range: 24 hours. | 20230420193058 represents 19:30:58 on April 20, 2023. | |
| end_time | String | No | Query end time in the format YYYYMMDDhhmmss. Defaults to 24 hours after start_time (if start_time is specified). Maximum range: 24 hours. | ||
| model_name | String | No | The model name. | wanx-v1 | |
| status | String | No | The task status: - PENDING - RUNNING - SUCCEEDED - FAILED - CANCELED - UNKNOWN | ||
| page_no | Integer | No | The page number of the results to return. Default: 1. | - | |
| page_size | Integer | No | The number of entries per page. Default: 10. | - |
Response parameters
| Field | Type | Description | Example |
|---|
| Field | Type | Description | Example |
| request_id | String | The unique ID for this request. | 7574ee8f-xxxx-xxxx-xxxx-11c33ab46e51 |
| data | Array | A list of query results. | json "data": [ { "api_key_id": "235", "caller_uid": "1808342417264262", "end_time": 1682527200093, "gmt_create": 1682514589152, "model_name": "paraformer-16k-1", "region": "cn-hangzhou", "request_id": "32b67b58-xxxx-xxxx-xxxx-230f0aee64d9", "start_time": 1682515862179, "status": "FAILED", "task_id": "cf52b16b-xxxx-xxxx-xxxx-17f9c211440c", "user_api_unique_key": "apikey:v1:audio:asr:transcription:paraformer-16k-1" } ] |
| data[].api_key_id | String | The API key ID. | |
| data[].caller_parent_id | String | The Alibaba Cloud account ID. | |
| data[].caller_uid | String | The Alibaba Cloud account ID. | |
| data[].gmt_create | Long | The task creation time (milliseconds since the epoch). | |
| data[].start_time | Long | The time the task started, in milliseconds since the epoch. | |
| data[].end_time | Long | The time the task ended, in milliseconds since the epoch. | |
| data[].region | String | The region. Example: cn-hangzhou | |
| data[].request_id | String | The request ID for the task submission. | |
| data[].status | String | The task status: - PENDING - RUNNING - SUCCEEDED - FAILED - CANCELED - UNKNOWN | |
| data[].task_id | String | The task ID. | |
| data[].user_api_unique_key | String | A unique API key generated from the model's API parameters at task submission. | |
| data[].model_name | String | The model name. | |
| page_no | Integer | The current page number. | "page_no": 1 |
| page_size | Integer | The number of entries per page. | "page_size": 10 |
| total_page | Integer | The total number of pages. | "total_page": 4 |
| total | Integer | The total number of entries. | "total": 39 |
| code | String | The error code returned when the call fails. | "code": "Throttling.RateQuota" |
| message | String | The error message returned when the call fails. | "message": "Requests rate limit exceeded, please try again later." |
Request example
curl
curl -X GET 'https://dashscope.aliyuncs.com/api/v1/tasks/?start_time=xxx&end_time=xxx&status=xxx' \
--header "Authorization: Bearer $DASHSCOPE_API_KEY"Response example
json
{
"total": 2,
"data": [\
{\
"api_key_id": "15xxxx",\
"caller_parent_id": "xxxxxxxxx",\
"caller_uid": "xxxxxxxxx",\
"gmt_create": 1745568428109,\
"model_name": "wanx2.1-kf2v-plus",\
"region": "cn-beijing",\
"request_id": "1abfc3c8-dd25-98da-ad0b-xxxxxx",\
"start_time": 1745568428138,\
"status": "RUNNING",\
"task_id": "50e2ccea-abc4-43d7-a0dc-xxxxxx",\
"user_api_unique_key": "apikey:v1:aigc:image2video:video-synthesis:wanx2.1-kf2v-plus"\
},\
{\
"api_key_id": "15xxxx",\
"caller_parent_id": "xxxxxxxxx",\
"caller_uid": "xxxxxxxxx",\
"end_time": 1745568302481,\
"gmt_create": 1745568293253,\
"model_name": "wanx2.1-t2i-turbo",\
"region": "cn-beijing",\
"request_id": "f6bf34d9-bf87-9e8b-9ed4-xxxxxx",\
"start_time": 1745568293273,\
"status": "SUCCEEDED",\
"task_id": "3c777dbc-8cc6-4d80-aa90-xxxxxx",\
"user_api_unique_key": "apikey:v1:aigc:text2image:image-synthesis:wanx2.1-t2i-turbo"\
}\
],
"total_page": 1,
"page_no": 1,
"request_id": "f6756b7e-d0bb-9b74-813a-xxxxxx",
"page_size": 10
}Cancel an asynchronous task
API description: Cancels an asynchronous task. Only tasks in PENDING state (queued, not started) can be canceled.
Rate limit: 20 QPS per Alibaba Cloud account (includes all RAM users).
Important
- You can cancel any task under the Alibaba Cloud account that owns the current API key, including tasks submitted with any API key under that account. You cannot cancel tasks from other accounts.
Request endpoint
http
POST https://dashscope.aliyuncs.com/api/v1/tasks/{task_id}/cancelRequest parameters
| Parameter passing | Field | Type | Required | Description | Example |
|---|
| Parameter passing | Field | Type | Required | Description | Example |
| Header | Authorization | String | Yes | The API key, in the format Bearer sk-xxx. | Bearer sk-xxx |
| Path | task_id | String | Yes | The ID of the task to cancel. | a8532587-xxxx-xxxx-xxxx-0c46b17950d1 |
Response parameters
| Field | Type | Description | Example |
|---|
| Field | Type | Description | Example |
| request_id | String | The unique ID for this request. | 7574ee8f-xxxx-xxxx-xxxx-11c33ab46e51 |
| code | String | The error code returned when the call fails. | "code": "Throttling.RateQuota" |
| message | String | The error message returned when the call fails. | "message": "Requests rate limit exceeded, please try again later." |
Request example
curl
curl -X POST 'https://dashscope.aliyuncs.com/api/v1/tasks/73205176-xxxx-xxxx-xxxx-16bd5d902219/cancel' \
--header "Authorization: Bearer $DASHSCOPE_API_KEY"Response example
json
{
"request_id": "45ac7f13-xxxx-xxxx-xxxx-e03c35068d83"
}Error codes
| HTTP status code | Error code | Error message | Description |
|---|
| HTTP status code | Error code | Error message | Description |
| 400 | UnsupportedOperation | Failed to cancel the task. Confirm that the task is in PENDING status. | Task cancellation failed. Only tasks in PENDING state can be canceled. |
Previous: Generate a temporary API keyNext: Configure asynchronous task callbacks
Is this page helpful?
Prerequisites
Query the result of an asynchronous task
Query the status of multiple asynchronous tasks
Cancel an asynchronous task
Error codes
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