# Overview

Talarion is a knowledge base of verified, dated facts about what's recently happened in the
world. Its core is a single capability — `research_brief` — which takes a search question and surfaces
the high-surprisal misconceptions an LLM would otherwise operate under: recent developments
past training cutoffs, the things an agent wouldn't know to check. Each fact is a question
and answer, stamped with the date it was known true and the source URLs it's drawn from.

There are two ways to use it.

### Build with the Talarion API

Call the research endpoint directly from your backend, agent, or product with a single authenticated request — no MCP client required.

→ [API Reference](/rest-api)

### Install Talarion Acumen in your AI assistant

Connect Claude, ChatGPT, Cursor, VS Code, and other MCP clients in a couple of clicks.

→ [Install the Acumen MCP](/installation)

For how sign-in and API keys work across both paths, see [Authentication](/authentication).