---
title: "Post Thread"
method: POST
path: "/api/comments/threads"
tags: ["runtime_mutations", "workspace_comments"]
---

# Post Thread

`POST /api/comments/threads`

## Request body

- QuadrillionCloudApiRoutersWorkspaceCommentsCreateThreadRequest
  - `target_kind` 'notebook-cell' | 'knowledge-card', required
  - `target_id` string, required
  - `target_label` string, required
  - `body` string, required

## Response `200`

Successful Response

- object

## Other responses

- `422` — Validation Error

## Changes

- **2026-09-18** `abf76937a751` — 2 info
  - added the optional property `detail/items/ctx` to the response with the `422` status
  - added the optional property `detail/items/input` to the response with the `422` status
- **2026-09-10** `3a8d4a28ae93` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/quadrillion/apis/quadrillion-cloud-api/changes/api/comments/threads/post.md)

---

[API](https://skmtc.dev/quadrillion/apis/quadrillion-cloud-api.md) · [All operations](https://skmtc.dev/quadrillion/apis/quadrillion-cloud-api/llms.txt) · [OpenAPI document](https://skmtc.dev/quadrillion/apis/quadrillion-cloud-api/revisions/397ad3a1d858?raw)