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# 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.