Legal
Open Source Licenses
GCsoft’s website and services use the open source software below. Copyright in each belongs to its respective holders, and each is used under its license terms.
1. Website
| Name | Version | License | Copyright holder |
|---|---|---|---|
| Python | 3.12 | PSF License | Python Software Foundation |
| Flask | 3.1.0 | BSD-3-Clause | Pallets |
| Werkzeug | 3.1.8 | BSD-3-Clause | Pallets |
| Jinja2 | 3.1.6 | BSD-3-Clause | Pallets |
| MarkupSafe | 3.0.3 | BSD-3-Clause | Pallets |
| itsdangerous | 2.2.0 | BSD-3-Clause | Pallets |
| click | 8.3.2 | BSD-3-Clause | Pallets |
| blinker | 1.9.0 | MIT | Jason Kirtland |
| Pretendard (font) | 1.3.9 | SIL Open Font License 1.1 | Kil Hyung-jin (orioncactus) |
| Noto Sans KR (font) | — | SIL Open Font License 1.1 |
2. HWP document engine (rhwp)
HWP/HWPX processing for document reading and editing and Korean Document AI uses rhwp.
- rhwp v0.8.7 — github.com/edwardkim/rhwp — MIT License, Copyright (c) 2025-2026 Edward Kim
- The full list and notices for the Rust libraries bundled with rhwp (about 400, under permissive licenses such as MIT, Apache-2.0, BSD and Zlib), web fonts (SIL Open Font License 1.1, GUST Font License) and ported algorithms (Volexity hwp-extract, BSD-3-Clause) are in rhwp’s THIRD_PARTY_LICENSES.md.
- HWP document features were developed with reference to Hancom’s published HWP file format documentation.
MIT License Copyright (c) 2025-2026 Edward Kim Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
3. Document processing server
The HWP document processing server uses the Python libraries below without modification.
| Name | Version | License |
|---|---|---|
| anyio | 4.15.1 | MIT |
| annotated-doc | 0.0.5 | MIT |
| annotated-types | 0.8.0 | MIT |
| attrs | 26.1.0 | MIT |
| certifi | 2026.7.22 | MPL-2.0 |
| cffi | 2.1.1 | MIT-0 |
| click | 8.5.0 | BSD-3-Clause |
| cryptography | 50.0.2 | Apache-2.0 OR BSD-3-Clause |
| h11 | 0.16.0 | MIT |
| httpcore | 1.0.9 | BSD-3-Clause |
| httpcore2 | 2.13.1 | BSD-3-Clause |
| httpx | 0.28.1 | BSD-3-Clause |
| httpx2 | 2.13.1 | BSD-3-Clause |
| idna | 3.20 | BSD-3-Clause |
| jsonschema | 4.26.0 | MIT |
| jsonschema-specifications | 2025.9.1 | MIT |
| markdown-it-py | 4.2.0 | MIT |
| mcp | 2.3.0 | MIT |
| mcp-types | 2.3.0 | MIT |
| mdurl | 0.1.2 | MIT |
| opentelemetry-api | 1.45.1 | Apache-2.0 |
| pycparser | 3.11 | BSD-3-Clause |
| pydantic | 2.14.1 | MIT |
| pydantic_core | 2.50.1 | MIT |
| Pygments | 2.21.0 | BSD-2-Clause |
| PyJWT | 2.15.1 | MIT |
| python-dotenv | 1.2.4 | BSD-3-Clause |
| python-multipart | 0.0.32 | Apache-2.0 |
| referencing | 0.37.0 | MIT |
| rich | 15.0.0 | MIT |
| rpds-py | 2026.9.1 | MIT |
| shellingham | 1.5.4 | ISC |
| sse-starlette | 3.5.0 | BSD-3-Clause |
| starlette | 1.8.0 | BSD-3-Clause |
| truststore | 0.10.5 | MIT |
| typer | 0.27.3 | MIT |
| typing-inspection | 0.4.4 | MIT |
| typing_extensions | 4.16.0 | PSF-2.0 |
| uvicorn | 0.54.0 | BSD-3-Clause |
4. License texts
- MIT License — opensource.org/license/mit
- BSD 2-Clause / 3-Clause — opensource.org/license/bsd-3-clause
- Apache License 2.0 — apache.org/licenses/LICENSE-2.0
- Mozilla Public License 2.0 — mozilla.org/MPL/2.0
- ISC License — opensource.org/license/isc-license-txt
- PSF License — docs.python.org/3/license.html
- SIL Open Font License 1.1 — openfontlicense.org
If you notice a missing notice, please let us know at [email protected] and we will add it promptly.