---
title: Sift Docs
description: Choose how to build with Sift's shared, cited brain.
template: splash
hero:
  tagline: Build application memory, connect an agent, or work from a terminal.
product: start
lifecycle: stable
appliesTo: current public interfaces
sourceArtifact: docs-site@v1
owner: Sift docs
raw: /raw/index.md
---

- [Build application memory](/memory-sdk/preview/)
- [Connect an agent](/connect/hosted-mcp/)
- [Work from a terminal](/cli/install/)

## Start with the boundary

The **Memory SDK** is an application runtime. **Hosted MCP** and the **CLI** connect an agent or operator to a Sift workspace. They do not share credentials or imply the same permissions.

The CLI is Stable. Hosted MCP is Beta while live client verification is completed. The Memory SDK remains Preview and noindex until a pinned runnable SDK/runtime artifact passes conformance.