# License Chat2DB Community version 5.3.0 and later is licensed under a modified version of the Apache License 2.0, with the additional conditions below. This License applies only to Chat2DB Community version 5.3.0 and later. It does not change the license of any earlier release. All Chat2DB releases published before version 5.3.0, including version 0.3.7 and the earlier historical tags, remain licensed under the Apache License 2.0. For package metadata, these terms may be identified as `LicenseRef-Chat2DB`. That identifier refers only to this root `LICENSE` file and does not create a separate license. ## 1. Permitted Use Subject to this License, you may use, copy, and modify the Software for: a. personal self-use, or self-hosted use by an educational, academic research, or non-profit organization; and b. Internal Use by you and Your Organization, including internal use of the desktop application, Web interface, Docker image, HTTP API, CLI, MCP, plugins, and reusable modules. You may publish and redistribute the Software or your modifications in Source form under this License, provided that you keep this License and all applicable copyright, attribution, and third-party notices. This permission does not allow you to provide an External Product or Service, Managed Delivery, Embedded Product Use, white-label delivery, OEM delivery, or Object-form distribution to an Independent External Party without written commercial authorization. ## 2. Internal Processing and Results Delivery Internal Use includes use by your Authorized Personnel to process data owned or provided by an Independent External Party and to deliver reports, analyses, migration results, or other non-interactive outputs to that party, provided that the party does not receive credentials, interfaces, configurations, controls, repeatable automated access, or any other ability to operate, configure, invoke, integrate, or direct the Software or its Community Core Capabilities. An Independent External Party providing business requirements, data, or acceptance criteria does not by itself make the use external. However, shared accounts, human intermediaries, proxy interfaces, prompts, agents, workflows, plugins, scheduled requests, or similar arrangements do not qualify for this exception when they give the party repeatable or practical control over the Software or its Community Core Capabilities. ## 3. Commercial Authorization Required Unless Chat2DB has expressly authorized you in writing, you may not: a. provide an External Product or Service; b. perform Managed Delivery for an Independent External Party; c. except for the Source-form redistribution expressly permitted by Section 1, distribute installers, binaries, archives, container images, deployment charts, patches, configurations, or other materials that enable an Independent External Party to deploy or use the Software in Object form; d. perform Embedded Product Use; e. provide white-label or OEM versions of the Software or a derivative work; or f. remove, obscure, or modify Chat2DB logos, copyright information, licensing notices, or attribution displayed by the official frontend or included in an official distribution. These conditions apply whether the offering is paid or free, whether access is direct or indirect, whether accounts exist, whether there is one tenant or many tenants, and whether the Software runs in a shared instance, a dedicated instance, a customer-owned cloud account, or any other deployment topology. The identity of the payer, account owner, infrastructure owner, distributor, or operator does not change the result. The relevant question is whether an Independent External Party receives the ability to use Community Core Capabilities. For written commercial authorization, contact Chat2DB through https://chat2db.ai. ## 4. Definitions "Chat2DB" means 爱獭科技（杭州）有限公司, the producer of the Software. "Software" means the Chat2DB Community software made available under this License in Source or Object form, including its official desktop, Web, Docker, HTTP API, CLI, MCP, plugin, and reusable module distributions. "Source" and "Object" have the meanings given in the Apache License 2.0. "You" means the individual or legal entity exercising permissions under this License. "Your Organization" means you and any legal entities that control, are controlled by, or are under common control with you. "Control" means direct or indirect ownership of more than fifty percent of the voting interests, or the power to direct the management and policies of an entity by ownership, contract, or otherwise. "Authorized Personnel" means employees and individual contractors acting solely on behalf of Your Organization, under obligations that protect the Software and prevent its use for any other person or organization. Customers, vendors, channel partners, distributors, and independent service providers are not Authorized Personnel merely because they have a commercial relationship with you. "Internal Use" means use of the Software solely by Authorized Personnel and internal systems for the internal operations of Your Organization, where no Independent External Party receives Community Core Capabilities. "Independent External Party" means any individual or organization outside Your Organization that is not Authorized Personnel. "Community Core Capabilities" means substantive database functionality provided by the Software, including database connection and credential management, metadata browsing, SQL, DDL, or DML execution, data editing, import or export, tasks and history, dashboards and charts, AI features, CLI, MCP, frontend interaction, HTTP APIs, plugins, and reusable API, Core, or SPI modules. "External Product or Service" means any product or service through which an Independent External Party can directly or indirectly operate, configure, invoke, integrate, automate, or otherwise use Community Core Capabilities, including through a Web UI, desktop application, HTTP API, CLI, MCP, embedded module, prompt, agent, workflow, proxy, or other interface. "Managed Delivery" means deploying, configuring, customizing, hosting, operating, maintaining, upgrading, or continuously administering the Software or a derivative work for an Independent External Party in a way that gives that party Community Core Capabilities. "Embedded Product Use" means incorporating the Software, its frontend, HTTP API, CLI, MCP, plugins, reusable modules, or a derivative implementation into a product made available to an Independent External Party, where that product provides substantive Community Core Capabilities. ## 5. Branding and Notices This License does not grant permission to use Chat2DB trade names, trademarks, service marks, or product names except as required to describe the origin of the Software and reproduce required notices. All uses of Chat2DB marks remain subject to applicable trademark law and any separately published trademark policy. If you modify the Software, you must include prominent notices stating that you changed it. You must retain all applicable copyright, patent, trademark, licensing, and attribution notices from the Software. ## 6. Contributions Unless you explicitly state otherwise in writing before submission, any contribution intentionally submitted for inclusion in Chat2DB is provided under this License. By submitting a contribution, you also agree that Chat2DB may use the contribution for commercial purposes and may include it in future Chat2DB releases made available under different license terms. ## 7. Third-Party Software Third-party components included with the Software remain subject to their own license terms and notices. This License does not replace, restrict, or modify those third-party terms. Where a file or component contains a separate license or copyright notice, that separate notice governs that file or component. ## 8. Apache License 2.0 Terms Except for the additional conditions stated in this License, all other rights and restrictions follow the Apache License 2.0, available at https://www.apache.org/licenses/LICENSE-2.0. If these additional conditions conflict with the Apache License 2.0 for Chat2DB Community version 5.3.0 or later, these additional conditions control. The Apache License 2.0 provisions concerning patent grants, patent litigation, notices, disclaimer of warranty, limitation of liability, and acceptance of additional liability are incorporated into this License. Copyright 2026 爱獭科技（杭州）有限公司.