# WorkflowRunHttpRequest

> Tracon documentation. Tracon is a .NET package family that adds a control
> plane on Microsoft Agent Framework, published as NuGet packages that run
> inside your own ASP.NET Core application.
>
> Page: https://tracon.dev/http-api/schemas/workflowrunhttprequest/
> Summary: OpenAPI request or response schema for WorkflowRunHttpRequest, including required fields, defaults, constraints, and linked nested types.

[← All HTTP schemas](/http-api/schemas/)

Request to run a workflow.

**Shape:** `object`

| Property | Required | Type | Description | Rules |
|---|---|---|---|---|
| `message` | no | `string` | User message to feed into the graph. | — |
| `sessionId` | no | `string` | Identifier of the execution session. If left empty, one is generated. Checkpoints are grouped under this value. | — |
| `parameters` | no | `object` | Values for the parameters the workflow declares, by name. A missing required value, an undeclared name or an over-long value is refused with `400` before the stream starts. Every agent step receives the values its own schema declares. | — |