---
title: "Start a workflow for an end user"
method: POST
path: "/api/workflow/start"
tags: ["Workflows"]
---

# Start a workflow for an end user

`POST /api/workflow/start`

## Request

- Base URL: `https://app.herondata.io`
- URL: `https://app.herondata.io/api/workflow/start`
- Auth: API key in header `x-api-key`

Start a workflow by heron_id for an end user, or start the default workflow if no workflow_heron_id provided

## Request body

- WorkflowStartRequestSchema
  - `end_user_heron_id` string, required
  - `silent_run` boolean
  - `trigger_id` string, nullable: Trigger node ID on the resolved workflow version.
  - `trigger_payload` object: JSON payload validated against the trigger node schema when present.
  - `workflow_heron_id` string, nullable
  - `workflow_parameters` object
  - `workflow_version_number` integer, nullable

## Response `200`

Workflow started successfully

- WorkflowStartResponseSchema
  - `action` string
  - `status` string
  - `workflow_execution_id` string
  - `workflow_id` string

## Other responses

- `404`: End user or workflow not found

## Changes

- **2026-11-03** `bd8008e49534`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/herondata/apis/heron-data-api/changes/api/workflow/start/post.md)

---

[API](https://skmtc.dev/herondata/apis/heron-data-api.md) - [All operations](https://skmtc.dev/herondata/apis/heron-data-api/llms.txt) - [OpenAPI document](https://skmtc.dev/herondata/apis/heron-data-api/revisions/1ec936e17fef?raw)