# General Translation Platform: Create or update a tag
URL: https://generaltranslation.com/en-US/docs/platform/openapi/reference/project/upsert-tag.mdx
---

title: "Create or update a tag"
description: "Create or upsert a tag that points at a set of file versions. API reference for Create or update a tag."
method: POST
full: true
_openapi:
  method: POST
  route: /v2/project/tags/create
  toc: []
  structuredData:
    headings: []
    contents:
      - content: Create or upsert a tag that points at a set of file versions.
---



## `POST https://api.gtx.dev/v2/project/tags/create`

Create or upsert a tag that points at a set of file versions.

Authentication: send an API key as a bearer token in the `Authorization: Bearer <key>` header.

### Parameters

- `gt-api-version` (header, "2025-01-01.v0" | "2025-11-03.v1" | "2026-02-18.v1" | "2026-03-06.v1", optional): API version. Defaults to the earliest supported version. Latest is `2026-03-06.v1`.
- `gt-project-id` (header, string, optional): Target project ID. Required when authenticating with an organization API key.

### Request body

Body (`application/json`, object):
- `tagId` (string, required)
- `files` (object[], required)
  - `fileId` (string, required)
  - `versionId` (string, required)
  - `branchId` (string, required)
- `message` (string)

### Responses

**200**: Created or updated tag.
Response body (`application/json`, object):
- `tag` (object)
  - `id` (string)
  - `tagId` (string)
  - `message` (string)
  - `createdAt` (string)
  - `updatedAt` (string)

**400**: The request was invalid.
Response body (`application/json`, object):
- `error` (string): Human-readable error message.

**401**: Missing or invalid API key.
Response body (`application/json`, object):
- `error` (string): Human-readable error message.

**403**: The API key lacks the required permission, or the action is not allowed on the current plan.
Response body (`application/json`, object):
- `error` (string): Human-readable error message.

The complete OpenAPI 3.1 spec is available at https://generaltranslation.com/openapi.yaml.