---
title: "Ad-hoc upload one or more unpacked extensions to a running browser instance."
method: POST
path: "/browsers/{id}/extensions"
tags: ["Browsers"]
---

# Ad-hoc upload one or more unpacked extensions to a running browser instance.

`POST /browsers/{id}/extensions`

Loads one or more unpacked extensions and restarts Chromium on the browser instance.

## Path parameters

- `id` string, required

## Response `201`

Extensions uploaded, Chromium restarted, and DevTools is ready

## Other responses

- `400` — Bad Request – invalid input
- `401` — Unauthorized – missing or invalid authorization token
- `403` — Forbidden – insufficient permissions or plan
- `404` — Resource not found
- `500` — Internal Server Error

---

[API](https://skmtc.net/kernel/apis/kernel-api.md) · [All operations](https://skmtc.net/kernel/apis/kernel-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/kernel/kernel-api/versions/9e8ce9fcf5e1/schema)