---
title: "Execute Against a Validation Request / Response"
method: POST
path: "/design/assertions/on-check/{projectId}/{virtualUserId}/{requestId}/{timestamp}"
tags: ["Design - Assertions"]
---

# Execute Against a Validation Request / Response

`POST /design/assertions/on-check/{projectId}/{virtualUserId}/{requestId}/{timestamp}`

## Path parameters

- `projectId` string, required
- `virtualUserId` string, required
- `requestId` string, required
- `timestamp` integer, required

## Request body

- KeyValueAssertionMapStringString
  - `key` Assertion
    - `negate` 'FALSE' | 'TRUE'
    - `name` string
    - `enabled` boolean
    - `id` string
  - `value` object

## Response `200`

OK

## Other responses

- `400` — Bad Request
- `403` — Forbidden
- `404` — Not Found
- `409` — Conflict
- `429` — Too Many Requests

---

[API](https://skmtc.net/octoperf/apis/octoperf-api.md) · [All operations](https://skmtc.net/octoperf/apis/octoperf-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/octoperf/octoperf-api/revisions/4b624af2cb6e/schema)