# Knowledge base

The **Knowledge base** endpoints let you manage the content that powers a replica’s knowledge and responses. You can add new entries from text, uploaded files, websites, or YouTube videos (with playlists split into separate entries), review existing entries, update their content, or remove them entirely.

Entries are processed asynchronously, moving from `NEW` to `PROCESSING` and finally to `VECTOR_CREATED` and `READY` once available for use. You can also filter and sort your knowledge base to quickly locate items, check for processing errors, and keep your replica’s data clean and up to date.


## Operations
- [List all knowledge base entries](https://docs.sensay.io/operation/operation-get-v1-replicas-parameter-knowledge-base.md)
- [Create a knowledge base entry](https://docs.sensay.io/operation/operation-post-v1-replicas-parameter-knowledge-base.md)
- [Get knowledge base entry by ID](https://docs.sensay.io/operation/operation-get-v1-replicas-parameter-knowledge-base-parameter.md)
- [Delete knowledge base entry by ID](https://docs.sensay.io/operation/operation-delete-v1-replicas-parameter-knowledge-base-parameter.md)
- [Update knowledge base entry](https://docs.sensay.io/operation/operation-patch-v1-replicas-parameter-knowledge-base-parameter.md)
- [Get supported file types](https://docs.sensay.io/operation/operation-get-v1-knowledge-base-file-types.md)

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