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 registerResearchPaperSearchTool(server: McpServer, config?: { exaApiKey?: string }): void {
server.tool(
"research_paper_search_exa",
"Search for academic papers and research using Exa AI - specializes in finding scholarly articles, research papers, and academic content. Returns detailed information about research findings and academic sources.",
{
query: z.string().describe("Research paper search query"),
numResults: z.number().optional().describe("Number of research papers to return (default: 5)")
},
async ({ query, numResults }) => {
const requestId = `research_paper_search_exa-${Date.now()}-${Math.random().toString(36).substring(2, 7)}`;
const logger = createRequestLogger(requestId, 'research_paper_search_exa');
logger.start(query);
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: `${query} academic paper research study`,
type: "neural",
numResults: numResults || API_CONFIG.DEFAULT_NUM_RESULTS,
contents: {
text: {
maxCharacters: API_CONFIG.DEFAULT_MAX_CHARACTERS
},
livecrawl: 'preferred'
},
includeDomains: ["arxiv.org", "scholar.google.com", "researchgate.net", "pubmed.ncbi.nlm.nih.gov", "ieee.org", "acm.org"]
};
logger.log("Sending request to Exa API for research papers");
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.results) {
logger.log("Warning: Empty or invalid response from Exa API");
return {
content: [{
type: "text" as const,
text: "No research papers found. Please try a different query."
}]
};
}
logger.log(`Found ${response.data.results.length} research papers`);
const result = {
content: [{
type: "text" as const,
text: JSON.stringify(response.data, null, 2)
}]
};
logger.complete();
return result;
} catch (error) {
logger.error(error);
if (axios.isAxiosError(error)) {
// Handle Axios errors specifically
const statusCode = error.response?.status || 'unknown';
const errorMessage = error.response?.data?.message || error.message;
logger.log(`Axios error (${statusCode}): ${errorMessage}`);
return {
content: [{
type: "text" as const,
text: `Research paper search error (${statusCode}): ${errorMessage}`
}],
isError: true,
};
}
// Handle generic errors
return {
content: [{
type: "text" as const,
text: `Research paper search error: ${error instanceof Error ? error.message : String(error)}`
}],
isError: true,
};
}
}
);
}