@mokei/mcp-fetch/lib/config.js

Fetch MCP server

import { createTool } from '@mokei/context-server';
import Turndown from 'turndown';
// @ts-expect-error no types
import { gfm } from 'turndown-plugin-gfm';
const turndownService = new Turndown().use(gfm).remove([
    'script',
    'style'
]);
export const config = {
    name: 'fetch',
    version: '0.1.0',
    tools: {
        get_markdown: createTool('Fetch a URL and return its contents as markdown', {
            type: 'object',
            properties: {
                url: {
                    type: 'string',
                    format: 'uri',
                    description: 'HTTP URL to fetch contents from'
                }
            },
            required: [
                'url'
            ],
            additionalProperties: false
        }, async (req)=>{
            process.stderr.write(`fetching ${req.arguments.url}\n`);
            try {
                const res = await fetch(req.arguments.url);
                if (!res.ok) {
                    return {
                        content: [
                            {
                                type: 'text',
                                text: `Failed to fetch with response status ${res.status}: ${res.statusText}`
                            }
                        ],
                        isError: true
                    };
                }
                const text = await res.text();
                const markdown = turndownService.turndown(text);
                return {
                    content: [
                        {
                            type: 'text',
                            text: markdown
                        }
                    ],
                    isError: false
                };
            } catch (err) {
                return {
                    content: [
                        {
                            type: 'text',
                            text: err.message ?? 'Unknown error'
                        }
                    ],
                    isError: true
                };
            }
        })
    }
};