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docs/rules/info-license-url.md

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+# info-license-url
+
+Requires the license URL in your API definitions.
+
+|OAS|Compatibility|
+|---|---|
+|2.0|✅|
+|3.0|✅|
+|3.1|✅|
+
+
+```mermaid
+flowchart TD
+
+root ==> Info --> License --> url
+
+style url fill:#codaf9,stroke:#0044d4,stroke-width:5px
+```
+
+## API design principles
+
+The principle of providing your users with accurate and relevant information does not apply to API design only, but to any product-related communication in general.
+
+Before they can work with your API, your users must understand the terms and conditions of your API usage.
+
+"Can I use your API? Will I get in trouble? Will I lose my job?"
+Sometimes questions like these go through consumers' minds.
+By being upfront with the API license, you can reduce friction towards usage.
+
+## Configuration
+
+|Option|Type|Description|
+|---|---|---|
+|severity|string|Possible values: `off`, `warn`, `error`. Default `warn` (in `recommended` configuration). |
+
+An example configuration:
+
+```yaml
+lint:
+  rules:
+    info-license-url: error
+```
+
+## Examples
+
+Given the following configuration:
+```yaml
+lint:
+  rules:
+    info-license-url: error
+```
+
+Example of an **incorrect** license URL:
+
+```yaml Object example
+info:
+  license:
+    name: MIT
+```
+
+Example of a **correct** license URL:
+
+```yaml Object example
+info:
+  license:
+    name: Apache 2.0
+    url: https://www.apache.org/licenses/LICENSE-2.0.html
+```
+
+## Related rules
+
+- [info-contact](./info-contact.md)
+- [info-license](./info-license.md)
+
+## Resources
+
+- [Rule source](https://github.com/Redocly/redocly-cli/blob/master/packages/core/src/rules/common/info-license-url.ts)
+- [License object docs](https://redocly.com/docs/openapi-visual-reference/license/)
+