---
title: "Start a round"
method: POST
path: "/v1/projects/{project_id}/rounds"
tags: ["Rounds"]
---

# Start a round

`POST /v1/projects/{project_id}/rounds`

## Request

- Base URL: `https://api.semilattice.ai` (the document declares no server; this is the origin it was published from)
- URL: `https://api.semilattice.ai/v1/projects/{project_id}/rounds`
- Auth: none declared

Start a new round, optionally titled. Refused while the latest round has
no simulations: use that one instead.

## Path parameters

- `project_id` string, uuid, required

## Headers

- `authorization` string

## Request body

- StartRoundBody
  - `title` string, nullable: What the round is testing. Leave it out and the round is named from its simulations.

## Response `201`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/semilattice/apis/semilattice-api.md) · [All operations](https://skmtc.dev/semilattice/apis/semilattice-api/llms.txt) · [OpenAPI document](https://skmtc.dev/semilattice/apis/semilattice-api/revisions/ed277716da4f?raw)