> ## Documentation Index
> Fetch the complete documentation index at: https://docs.keywordinsights.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# API Use Cases

This is the hub for all use cases for the Keyword Insights public API. Each page includes
basic request examples, supported parameters, customization options, and guidance on
retrieving results.

View the OpenAPI routes here: [https://api.keywordinsights.ai/apidocs/](https://api.keywordinsights.ai/apidocs/)

### Public API use cases

* [Clustering](/api/api-use-cases/public-api-clustering) — group keywords into topical clusters
* [Content Brief](/api/api-use-cases/public-api-content-brief) — generate structured briefs and outlines
* [Writer Agent](/api/api-use-cases/public-api-writer-agent) — generate long-form content drafts
* [Advanced Ranking](/api/api-use-cases/public-api-advanced-ranking) — run advanced SERP-based ranking analysis
* [Keyword Content](/api/api-use-cases/public-api-keyword-content) — build content based on keyword inputs

When using the public API, create an API key and include it with every request.
See [API Key Authentication](/api/api-key-authentication) to get started.