---
title: "Upload an Extension"
method: POST
path: "/v1/extensions"
---

# Upload an Extension

`POST /v1/extensions`

## Response `200`

The request has succeeded.

- Extension
  - `id` string, required
  - `createdAt` string, date-time, required
  - `updatedAt` string, date-time, required
  - `fileName` string, required
  - `projectId` string, required — The Project ID linked to the uploaded Extension.

## Changes

- **2026-02-26** `a2379f6bf614` — 1 breaking, 1 info
  - the `projectId` response's property type/format changed from ``/`` to `string`/`` for status `200`
  - removed `#/components/schemas/uuid` from the `projectId` response property `allOf` list for the response status `200`
- **2024-12-29** `7d749df7d5d7` — 1 info
  - removed the non-success response with the status `415`
- **2024-10-27** `b37d85811d1c` — 4 info
  - removed `#/components/schemas/Entity` from the response body `allOf` list for the response status `200`
  - added the required property `createdAt` to the response with the `200` status
  - added the required property `id` to the response with the `200` status
  - added the required property `updatedAt` to the response with the `200` status
- **2024-10-27** `0069ed71133a` — 3 breaking, 1 info
  - removed the required property `created_at` from the response with the `200` status
  - removed the required property `id` from the response with the `200` status
  - removed the required property `updated_at` from the response with the `200` status
  - added `#/components/schemas/Entity` to the response body `allOf` list for the response status `200`
- …earlier changes not shown

[Full history](https://skmtc.dev/browserbase/apis/browserbase-api/changes/v1/extensions/post.md)

---

[API](https://skmtc.dev/browserbase/apis/browserbase-api.md) · [All operations](https://skmtc.dev/browserbase/apis/browserbase-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/browserbase/browserbase-api/revisions/550634919db9/schema)