---
title: "Advance the simulation"
method: POST
path: "/advance/{testid}"
tags: ["control"]
---

# Advance the simulation

`POST /advance/{testid}`

Advances the simulation with optional input overwrites. The payload can include input values and activation flags for overwriting.

## Request body

- object

## Response `200`

Successful response with simulation advancement results.

- StepResponse
  - `message` string — A message describing the response.
  - `payload` object — Current values of all input and measurement signals; always includes "time".
    - `time` number, required — Current simulation time (epoch seconds).
  - `status` integer — HTTP status code.

## Changes

- **2025-12-18** `e979b6db7bfd` — 1 breaking, 1 info
  - request body became required
  - added the required property `payload/time` to the response with the `200` status
- **2025-11-18** `6f370686638c` — 1 info
  - api tag `control` added
- **2025-11-18** `60d61eda81c7` — 1 breaking, 2 info
  - removed the required property `payload/time` from the response with the `200` status
  - api tag `Test Execution` removed
  - request body became optional

[Change history](https://skmtc.dev/ibpsa/apis/boptest-service-api/changes/advance/:testid/post.md)

---

[API](https://skmtc.dev/ibpsa/apis/boptest-service-api.md) · [All operations](https://skmtc.dev/ibpsa/apis/boptest-service-api/llms.txt) · [OpenAPI document](https://skmtc.dev/ibpsa/apis/boptest-service-api/revisions/e979b6db7bfd?raw)