---
title: "Create inbox category"
method: POST
path: "/v3/inbox/threads/categories"
tags: ["Inbox"]
---

# Create inbox category

`POST /v3/inbox/threads/categories`

<small>_Requires the `inbox:write` scope (or a broader one that includes it)._</small>

Creates a custom inbox category. Names must be unique within the team (case-insensitive).

## Request body

- object
  - `name` string, required
  - `color` 'gray' | 'green' | 'blue' | 'red' | 'yellow' | 'purple' | 'orange' | 'lightBlue' | 'olive', required

## Response `201`

Category created

- object — Inbox thread category. Reserved categories are owned by the system and cannot be modified or deleted.
  - `id` integer, required
  - `name` string, required
  - `color` 'gray' | 'green' | 'blue' | 'red' | 'yellow' | 'purple' | 'orange' | 'lightBlue' | 'olive', required
  - `isReserved` boolean, required — True for system-reserved categories (e.g., the default category). Reserved categories cannot be renamed, recoloured, or deleted.
  - `unreadThreadsCount` integer, required — Number of unread threads currently assigned to this category.

## Other responses

- `400` — Body validation failure, or a business-rule rejection.
- `401` — Unauthorized. The response body is empty; check the `WWW-Authenticate` header for the expected scheme.
- `403` — Inbox feature is not available for this user or team.
- `409` — A category with this name already exists.
- `429` — Too Many Requests

---

[API](https://skmtc.dev/reply/apis/reply-api.md) · [All operations](https://skmtc.dev/reply/apis/reply-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/reply/reply-api/revisions/1c3d32eaf95e/schema)