MIT License

Copyright (c) 2026 Max M. Lang and cxg-census-mcp contributors

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.

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Trademark notice
----------------

"CELLxGENE", "CELLxGENE Discover", and "CELLxGENE Discover Census" are
product/brand names of the Chan Zuckerberg Initiative (CZI). This project is
an independent, community-maintained Model Context Protocol (MCP) server that
*queries* the publicly available CZ CELLxGENE Discover Census data product.
It is not affiliated with, endorsed by, sponsored by, or otherwise connected
to CZI, the Chan Zuckerberg Biohub, the European Bioinformatics Institute
(EBI / EMBL-EBI), or any government statistical agency (including the
United States Census Bureau). No use of these third-party names is intended
as a claim of affiliation; any references are purely descriptive
("nominative use") to identify the upstream data and services this server
talks to.

Upstream data and content licensing
-----------------------------------

- **CZ CELLxGENE Discover Census data** is distributed by the Chan Zuckerberg
  Initiative under the Creative Commons Attribution 4.0 International license
  (CC BY 4.0), https://creativecommons.org/licenses/by/4.0/. Every response
  produced by this server includes a machine-readable `attribution` field
  pointing back to the Census; users redistributing derived results must
  preserve that attribution and indicate that changes were made (aggregation,
  filtering, etc.).
- **Ontology terms** are retrieved from the EBI Ontology Lookup Service
  (OLS4) and originate from third-party ontologies (Cell Ontology / CL,
  Uberon / UBERON, Mondo / MONDO, Experimental Factor Ontology / EFO,
  HANCESTRO, and others). Each ontology carries its own license (typically
  CC BY 4.0 or CC0); see the respective ontology's website for terms.
- **Trade marks remain the property of their respective owners.**

The MIT license above covers only the source code in this repository, not the
upstream data, ontologies, or any third-party trademarks.
