# Atomic

> Atomic is a local-first personal knowledge base that turns freeform notes into a semantically-connected, AI-augmented knowledge graph. Notes are stored as plain markdown "atoms" linked by tags, semantic search (vector embeddings), and an evolving wiki synthesized by LLMs. Atomic runs locally, can be self-hosted, and works with multiple AI providers.

## Core concepts

- [Atoms](https://atomicapp.ai/concepts/atoms/): The unit of knowledge — a single markdown note.
- [Tags](https://atomicapp.ai/concepts/tags/): How atoms are grouped and connected.
- [Semantic search](https://atomicapp.ai/concepts/semantic-search/): Vector-embedding search across all atoms.
- [Wiki synthesis](https://atomicapp.ai/concepts/wiki-synthesis/): LLM-generated, evolving wiki built from your atoms.
- [Chat](https://atomicapp.ai/concepts/chat/): Talk to your knowledge base.
- [Canvas](https://atomicapp.ai/concepts/canvas/): Spatial interface for arranging atoms.
- [Daily briefings](https://atomicapp.ai/concepts/daily-briefings/): Automated summaries.

## Getting started

- [Overview](https://atomicapp.ai/getting-started/)
- [Installation](https://atomicapp.ai/getting-started/installation/)
- [Self-hosting](https://atomicapp.ai/getting-started/self-hosting/)
- [AI providers](https://atomicapp.ai/getting-started/ai-providers/)

## Guides

- [Browser extension](https://atomicapp.ai/guides/browser-extension/)
- [MCP server](https://atomicapp.ai/guides/mcp-server/)
- [iOS app](https://atomicapp.ai/guides/ios-app/)
- [Importing data](https://atomicapp.ai/guides/importing-data/)
- [URL ingestion and feeds](https://atomicapp.ai/guides/url-ingestion-and-feeds/)
- [Multi-database](https://atomicapp.ai/guides/multi-database/)

## Self-hosting

- [First-run setup](https://atomicapp.ai/self-hosting/first-run-setup/)
- [Docker Compose](https://atomicapp.ai/self-hosting/docker-compose/)
- [Configuration](https://atomicapp.ai/self-hosting/configuration/)
- [Token management](https://atomicapp.ai/self-hosting/token-management/)
- [Data and backups](https://atomicapp.ai/self-hosting/data-and-backups/)

## API

- [API overview](https://atomicapp.ai/api/overview/)
- [WebSocket events](https://atomicapp.ai/api/websocket-events/)
- [Interactive API explorer](https://atomicapp.ai/api/explorer/)
- [OpenAPI spec](https://atomicapp.ai/openapi.json)

## Blog

- [Index](https://atomicapp.ai/blog/)
- [RSS](https://atomicapp.ai/rss.xml)

## Project

- [Source code](https://github.com/kenforthewin/atomic)
- [Latest release](https://github.com/kenforthewin/atomic/releases/latest)
- [Issue tracker](https://github.com/kenforthewin/atomic/issues)