brave_web_search
Search the web for general queries, news, articles, and online content using Brave Search API with pagination and filtering options.
Instructions
Performs a web search using the Brave Search API, ideal for general queries, news, articles, and online content. Use this for broad information gathering, recent events, or when you need diverse web sources. Supports pagination, content filtering, and freshness controls. Maximum 20 results per request, with offset for pagination.
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| query | Yes | Search query (max 400 chars, 50 words) | |
| count | No | Number of results (1-20, default 10) | |
| offset | No | Pagination offset (max 9, default 0) |
Implementation Reference
- index.ts:187-218 (handler)Core implementation of the brave_web_search tool: performs API call to Brave Search, handles response, extracts and formats web search results.
async function performWebSearch(query: string, count: number = 10, offset: number = 0) { checkRateLimit(); const url = new URL('https://api.search.brave.com/res/v1/web/search'); url.searchParams.set('q', query); url.searchParams.set('count', Math.min(count, 20).toString()); // API limit url.searchParams.set('offset', offset.toString()); const response = await fetch(url, { headers: { 'Accept': 'application/json', 'Accept-Encoding': 'gzip', 'X-Subscription-Token': BRAVE_API_KEY } }); if (!response.ok) { throw new Error(`Brave API error: ${response.status} ${response.statusText}\n${await response.text()}`); } const data = await response.json() as BraveWeb; // Extract just web results const results = (data.web?.results || []).map(result => ({ title: result.title || '', description: result.description || '', url: result.url || '' })); return results.map(r => `Title: ${r.title}\nDescription: ${r.description}\nURL: ${r.url}` ).join('\n\n'); } - index.ts:331-341 (handler)MCP CallTool handler case for brave_web_search: validates arguments and calls performWebSearch.
case "brave_web_search": { if (!isBraveWebSearchArgs(args)) { throw new Error("Invalid arguments for brave_web_search"); } const { query, count = 10 } = args; const results = await performWebSearch(query, count); return { content: [{ type: "text", text: results }], isError: false, }; } - index.ts:18-45 (schema)Tool schema definition for brave_web_search, including name, description, and JSON schema for inputs.
const WEB_SEARCH_TOOL: Tool = { name: "brave_web_search", description: "Performs a web search using the Brave Search API, ideal for general queries, news, articles, and online content. " + "Use this for broad information gathering, recent events, or when you need diverse web sources. " + "Supports pagination, content filtering, and freshness controls. " + "Maximum 20 results per request, with offset for pagination. ", inputSchema: { type: "object", properties: { query: { type: "string", description: "Search query (max 400 chars, 50 words)" }, count: { type: "number", description: "Number of results (1-20, default 10)", default: 10 }, offset: { type: "number", description: "Pagination offset (max 9, default 0)", default: 0 }, }, required: ["query"], }, }; - index.ts:169-176 (schema)Type guard function for validating brave_web_search arguments.
function isBraveWebSearchArgs(args: unknown): args is { query: string; count?: number } { return ( typeof args === "object" && args !== null && "query" in args && typeof (args as { query: string }).query === "string" ); } - index.ts:318-320 (registration)Registers brave_web_search (via WEB_SEARCH_TOOL) in the MCP listTools handler.
server.setRequestHandler(ListToolsRequestSchema, async () => ({ tools: [WEB_SEARCH_TOOL, LOCAL_SEARCH_TOOL], }));