> ## 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.

# Quickstart

> Call your first MCP tool through Bridger in under 5 minutes.

Bridger is used by connecting to the **hosted Gateway** (`mcp.datari.kr`) with an API key.
You can start right away — no separate server to install or operate.

## Why Bridger exists

When you connect directly to public-data APIs, every provider does things a little differently.

* `serviceKey` names and placement vary.
* Some APIs return JSON, others only XML.
* Coordinate, region-code, and pagination parameter names are inconsistent.
* Error codes and retry rules are not standardized.
* Audit logs and operational traces need separate handling.

Bridger normalizes those differences in the Gateway so you can connect with one key,
activate only the provider keys you need, find the tool, and call it.

## 1. Issue an API key

Create an account at [admin.datari.kr](https://admin.datari.kr) and issue a key under
**Settings → API Keys**. See the [API key guide](/en/guides/api-keys) for details.

```bash theme={null}
export DATA_BRIDGE_API_KEY="dk_live_..."
```

## 2. Connect to the Gateway

The Gateway host is `mcp.datari.kr`. Connect to that address from your MCP client or curl.

## 3. List available tools

Use JSON-RPC `tools/list` to retrieve every tool registered with Bridger.

```bash theme={null}
curl -X POST https://mcp.datari.kr/mcp \
  -H "x-api-key: $DATA_BRIDGE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'
```

If you prefer a flatter catalog view, `GET /registry/tools` shows the same tools in a searchable list.

## 4. Activate the provider key you need

For presets that require a public-data `serviceKey`, follow the [API key guide](/en/guides/api-keys)
and register the provider key under **Settings → Provider Keys** before you call the tool.

## 5. Call your first tool

Run a single tool for real. The example below calls the KMA ultra-short-term forecast.

```bash theme={null}
curl -X POST https://mcp.datari.kr/mcp \
  -H "x-api-key: $DATA_BRIDGE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 2,
    "method": "tools/call",
    "params": {
      "name": "getultrashortcast",
      "arguments": {
        "searchKeyword": "Seoul",
        "numOfRows": 10
      }
    }
  }'
```

## Next steps

<CardGroup cols={2}>
  <Card title="Connect to Claude" icon="comment" href="/en/guides/claude">
    Call Bridger tools in natural language from Claude Desktop.
  </Card>

  <Card title="Connect to ChatGPT" icon="message" href="/en/guides/chatgpt">
    Use Bridger via ChatGPT.
  </Card>

  <Card title="Use REST / SDK" icon="code" href="/en/guides/api">
    Call directly with the Node.js or Python SDK.
  </Card>

  <Card title="Register your own API (BYOAPI)" icon="plug" href="/en/concepts/byoapi">
    Turn any API with an OpenAPI spec into a tool.
  </Card>
</CardGroup>