---
title: "Changes to Trigger a new test session"
method: POST
path: "/v1/test-sessions/trigger"
---

# Changes to Trigger a new test session

`POST /v1/test-sessions/trigger`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 2 of 8 revisions.

- **2026-10-31** `bc90d1bfa738`: 6 info
- **2026-07-13** `a4fea1ad9b9a`: 3 warning, 5 info

## Changes

- **2026-10-31** `bc90d1bfa738`: 6 info
  - added the optional property `errorCode` to the response with the `400` status
  - added the optional property `errorCode` to the response with the `401` status
  - added the optional property `errorCode` to the response with the `402` status
  - added the optional property `errorCode` to the response with the `403` status
  - added the optional property `errorCode` to the response with the `404` status
  - added the optional property `errorCode` to the response with the `429` status
- **2026-07-13** `a4fea1ad9b9a`: 3 warning, 5 info
  - added the new `GRPC` enum value to the `results/items/checkType` response property for the response status `201`
  - added the new `SSL` enum value to the `results/items/checkType` response property for the response status `201`
  - added the new `TRACEROUTE` enum value to the `results/items/checkType` response property for the response status `201`
  - added the new optional request property `metadata/github`
  - added the optional property `metadata/github` to the response with the `201` status
  - added the optional property `results/items/responseTime` to the response with the `201` status
  - added the optional property `results/items/startedAt` to the response with the `201` status
  - added the optional property `results/items/stoppedAt` to the response with the `201` status

---

[Operation](https://skmtc.dev/checklyhq/apis/checkly-public-api/docs/v1/test-sessions/trigger/post.md) - [API](https://skmtc.dev/checklyhq/apis/checkly-public-api.md) - [Page](https://skmtc.dev/checklyhq/apis/checkly-public-api/changes/v1/test-sessions/trigger/post)