---
title: "Download the engine's source (AGPL-3.0)"
method: GET
path: "/source"
tags: ["meta"]
---

# Download the engine's source (AGPL-3.0)

`GET /source`

## Request

- Base URL: `https://api.niubai.vip` (the document declares no server; this is the origin it was published from)
- URL: `https://api.niubai.vip/source`
- Auth: HTTP bearer

The complete source of the editing engine this API runs, as a tar.gz, offered under the GNU AGPL-3.0 to the API's users: send your API key (a free `sk_test_` key is enough; the hosted MCP endpoint relays this for its keyless tier). This is the licence's network-use source offer; the gateway (keys, billing, storage) is a separate program and is not included.

## Response `200`

Successful Response

## Other responses

- `401`: error.code is one of: unauthorized
- `429`: error.code is one of: rate_limited

---

[API](https://skmtc.dev/niubai/apis/pdf-edit-api-gateway.md) · [All operations](https://skmtc.dev/niubai/apis/pdf-edit-api-gateway/llms.txt) · [OpenAPI document](https://skmtc.dev/niubai/apis/pdf-edit-api-gateway/revisions/1ad0ce16ca04?raw)