---
title: "Changes to Create Tag"
method: POST
path: "/tags"
---

# Changes to Create Tag

`POST /tags`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 5 of 43 revisions.

- **2026-08-04** `bed30b2b43bc`: 1 warning
- **2026-07-13** `228cc05ba97d`: 3 info
- **2026-06-07** `13f3bc084194`: 6 breaking, 2 warning, 11 info
- **2026-01-17** `8590daeecaea`: 1 breaking
- **2025-02-18** `7b086652e3cf`: 2 info

## Changes

- **2026-08-04** `bed30b2b43bc`: 1 warning
  - changed the pattern of the request property `name` from `^[ -~]*[A-Za-z0-9][ -~]*$` to `^[^\x00-\x1f\x7f-\x9f]*[^\W_][^\x00-\x1f\x7f-\x9f]*$`
- **2026-07-13** `228cc05ba97d`: 3 info
  - added the new optional `header` request parameter `X-Buttondown-Collision-Behavior`
  - added the non-success response with the status `429`
  - added the success response with the status `200`
- **2026-06-07** `13f3bc084194`: 6 breaking, 2 warning, 11 info
  - the `color` request property's minLength was increased from `0` to `4`
  - the `name` request property's minLength was increased from `0` to `1`
  - added the pattern `^#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})$` to the request property `color`
  - added the pattern `^[ -~]*[A-Za-z0-9][ -~]*$` to the request property `name`
  - response property `description` list-of-types was widened by adding types `null` to media type `application/json` of response `201`
  - the `code` response's property type changed from no type to `string` for status `403`
  - the `color` request property's maxLength was set to `7`
  - the `name` request property's maxLength was set to `100`
  - the endpoint scheme security `ApiKeyAuth` was added to the API
  - the endpoint scheme security `PermissionAuthenticationRequirement` was removed from the API
  - api tag `Tags` added
  - added the new optional request property `public_description`
  - added the new optional request property `subscriber_editable`
  - request property `description` list-of-types was widened by adding types `null` to media type `application/json`
  - added the non-success response with the status `401`
  - added the non-success response with the status `422`
  - added the optional property `public_description` to the response with the `201` status
  - added `#/components/schemas/TagErrorCode` to the `code` response property `allOf` list for the response status `400`
  - added the required property `subscriber_editable` to the response with the `201` status
- **2026-01-17** `8590daeecaea`: 1 breaking
  - the `id` response's property format changed from `uuid` to no format for status `201`
- **2025-02-18** `7b086652e3cf`: 2 info
  - the endpoint scheme security `PermissionAuthenticationRequirement` was added to the API
  - the endpoint scheme security `AuthenticationRequirement` was removed from the API

---

[Operation](https://skmtc.dev/buttondown/apis/buttondown-api/docs/tags/post.md) - [API](https://skmtc.dev/buttondown/apis/buttondown-api.md) - [Page](https://skmtc.dev/buttondown/apis/buttondown-api/changes/tags/post)