# MCP Builder Example 1 Database Query Tool

> Sub-skill of mcp-builder: Example 1: Database Query Tool (+1).

- Skill: `vamseeachanta/mcp-builder-example-1-database-query-tool` (Agent Skill)
- Install (CLI): `npx skillmds@latest add vamseeachanta/mcp-builder-example-1-database-query-tool`
- Raw SKILL.md: https://api.skillmd.com/api/skills/vamseeachanta/mcp-builder-example-1-database-query-tool/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: vamseeachanta (https://skillmd.com/u/vamseeachanta)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/vamseeachanta/mcp-builder-example-1-database-query-tool

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# Example 1: Database Query Tool (+1)

## Example 1: Database Query Tool


```typescript
server.setRequestHandler(CallToolRequestSchema, async (request) => {
  if (request.params.name === "query_database") {
    const { sql, params } = request.params.arguments;
    const result = await db.query(sql, params);
    return { content: [{ type: "text", text: JSON.stringify(result, null, 2) }] };
  }
});
```


## Example 2: API Integration


```typescript
server.setRequestHandler(CallToolRequestSchema, async (request) => {
  if (request.params.name === "fetch_weather") {
    const { city } = request.params.arguments;
    const response = await fetch(`https://api.weather.com/v1/${city}`);
    const data = await response.json();
    return { content: [{ type: "text", text: `Temperature: ${data.temp}F` }] };
  }
});
```