deepSearch.ts•4.25 kB
import { z } from "zod";
import axios from "axios";
import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import { API_CONFIG } from "./config.js";
import { ExaSearchRequest, ExaSearchResponse } from "../types.js";
import { createRequestLogger } from "../utils/logger.js";
export function registerDeepSearchTool(server: McpServer, config?: { exaApiKey?: string }): void {
server.tool(
"deep_search_exa",
"Searches the web and return results in a natural language format. Deep search uses smart query expansion and provides high-quality context for each result. You can provide additional query variations for even better results.",
{
objective: z.string().describe("Query: Description of what the web search is looking for. Try to make the search query atomic - looking for a specific piece of information. May include guidance about preferred sources or freshness."),
search_queries: z.array(z.string()).optional().describe("Additional Queries: Optional list of additional search queries for query expansion. The search queries should be related to the objective. Only 2-4 additional queries are recommended."),
},
{
readOnlyHint: true,
destructiveHint: false,
idempotentHint: true
},
async ({ objective, search_queries }) => {
const requestId = `deep_search_exa-${Date.now()}-${Math.random().toString(36).substring(2, 7)}`;
const logger = createRequestLogger(requestId, 'deep_search_exa');
logger.start(objective);
try {
// Create a fresh axios instance for each request
const axiosInstance = axios.create({
baseURL: API_CONFIG.BASE_URL,
headers: {
'accept': 'application/json',
'content-type': 'application/json',
'x-api-key': config?.exaApiKey || process.env.EXA_API_KEY || ''
},
timeout: 25000
});
const searchRequest: ExaSearchRequest = {
query: objective,
type: "deep",
contents: {
context: true
}
};
// Add additional queries if provided
if (search_queries && search_queries.length > 0) {
searchRequest.additionalQueries = search_queries;
logger.log(`Using ${search_queries.length} additional queries`);
} else {
logger.log("Using automatic query expansion");
}
logger.log("Sending deep search request to Exa API");
const response = await axiosInstance.post<ExaSearchResponse>(
API_CONFIG.ENDPOINTS.SEARCH,
searchRequest,
{ timeout: 25000 }
);
logger.log("Received response from Exa API");
if (!response.data || !response.data.context) {
logger.log("Warning: Empty or invalid response from Exa API");
return {
content: [{
type: "text" as const,
text: "No search results found. Please try a different query."
}]
};
}
logger.log(`Context received with ${response.data.context.length} characters`);
const result = {
content: [{
type: "text" as const,
text: response.data.context
}]
};
logger.complete();
return result;
} catch (error) {
logger.error(error);
if (axios.isAxiosError(error)) {
// Handle Axios errors specifically
const statusCode = error.response?.status || 'unknown';
const errorMessage = error.response?.data?.message || error.message;
logger.log(`Axios error (${statusCode}): ${errorMessage}`);
return {
content: [{
type: "text" as const,
text: `Deep search error (${statusCode}): ${errorMessage}`
}],
isError: true,
};
}
// Handle generic errors
return {
content: [{
type: "text" as const,
text: `Deep search error: ${error instanceof Error ? error.message : String(error)}`
}],
isError: true,
};
}
}
);
}