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

# What is Bridger?

> A bridge that lets AI use 230+ public-data APIs and BYOAPI directly through the MCP standard.

Bridger is a public-data operations gateway inspired by the idea of a bridge between data and tools.
It handles authentication, parsing, and error handling for public-data APIs on your behalf, and converts them into tools that AI can use directly through the [Model Context Protocol (MCP)](/en/concepts/mcp) standard. Any API with an OpenAPI spec becomes an AI tool once registered.

## Problems Bridger solves

<CardGroup cols={3}>
  <Card title="OpenAPI → MCP conversion" icon="arrow-right-arrow-left">
    Wiring OpenAPI documents into AI agent tools is hard. Bridger converts them automatically.
  </Card>

  <Card title="Public-data adapter" icon="building-columns">
    It handles the complex parts of integration for you — auth keys, coordinate conversion (lat/lon → grid), error-code mapping, and more.
  </Card>

  <Card title="Centralized management" icon="server">
    Beyond local MCP servers, manage MCP tools centrally across team and remote environments.
  </Card>
</CardGroup>

## Core components

<CardGroup cols={2}>
  <Card title="Hosted Gateway" icon="cloud" href="/en/api-reference/introduction">
    Call preset and registered API tools with a single API key.
  </Card>

  <Card title="Preset catalog" icon="table" href="/en/presets/index">
    Public-data APIs served as MCP tools, organized by category.
  </Card>
</CardGroup>

## Next steps

<Steps>
  <Step title="Get started in 5 minutes with the Quickstart">
    Call your first tool in the [Quickstart](/en/getting-started/quickstart).
  </Step>

  <Step title="Connect to Claude / ChatGPT">
    Follow the [Claude](/en/guides/claude) or [ChatGPT](/en/guides/chatgpt) guide.
  </Step>

  <Step title="Register your own API (BYOAPI, coming soon)">
    Register your own service with an OpenAPI spec as a tool via [BYOAPI](/en/concepts/byoapi). (coming soon)
  </Step>
</Steps>