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POST
/
api
/
prompt
Submit a workflow for execution
curl --request POST \
  --url https://cloud.comfy.org/api/prompt \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "prompt": {},
  "number": 123,
  "front": true,
  "extra_data": {},
  "partial_execution_targets": [
    "<string>"
  ]
}
'
{
  "prompt_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "number": 123,
  "node_errors": {}
}

Authorizations

​
X-API-Key
string
header
required

API key authentication. Generate an API key from your account settings at https://comfy.org/account. Pass the key in the X-API-Key header.

Body

application/json
​
prompt
object
required

The workflow graph to execute

​
number
number

Priority number for the queue (lower numbers have higher priority). Note: Accepted for ComfyUI API compatibility but ignored in cloud. Cloud uses its own queue management with per-user ordering and fair scheduling.

​
front
boolean

If true, adds the prompt to the front of the queue. Note: Accepted for ComfyUI API compatibility but ignored in cloud. Cloud manages queue ordering internally based on job submission time and fair scheduling.

​
extra_data
object

Extra data to be associated with the prompt

​
partial_execution_targets
string[]

List of node names to execute

Response

Success - Prompt accepted

​
prompt_id
string<uuid>

Unique identifier for the prompt execution

​
number
number

Priority number in the queue

​
node_errors
object

Any errors in the nodes of the prompt