Implement research API endpoint with Exa AI and static fallback

index.js

@@ -80,6 +80,63 @@ app.post("/messages", express.json(), async (req, res) => {
   }
 });
 
+app.post("/api/research", express.json(), async (req, res) => {
+  const { query } = req.body;
+  console.log(`[Library] Received research request for: '${query}'`);
+  
+  const exaKey = process.env.EXA_API_KEY;
+  const nimKey = process.env.NVIDIA_NIM_API_KEY || process.env.NVIDIA_API_KEY || process.env.OPENAI_API_KEY;
+  
+  if (exaKey && nimKey) {
+    try {
+      const exaRes = await fetch("https://api.exa.ai/search", {
+        method: "POST",
+        headers: {
+          "x-api-key": exaKey,
+          "Content-Type": "application/json"
+        },
+        body: JSON.stringify({
+          query: query,
+          numResults: 3,
+          text: true
+        })
+      });
+      const exaData = await exaRes.json();
+      const rawText = exaData.results ? exaData.results.map(r => r.text).join("\n") : "";
+      
+      const nimRes = await fetch("https://integrate.api.nvidia.com/v1/chat/completions", {
+        method: "POST",
+        headers: {
+          "Authorization": `Bearer ${nimKey}`,
+          "Content-Type": "application/json"
+        },
+        body: JSON.stringify({
+          model: "stepfun-ai/step-3.7-flash",
+          messages: [
+            { role: "system", content: "You are a research summarizer. Compress the raw text into a strict 500-word markdown brief detailing novel formula structures, chemical symbols, or algorithms." },
+            { role: "user", content: rawText.substring(0, 30000) }
+          ],
+          max_tokens: 500
+        })
+      });
+      const nimData = await nimRes.json();
+      const brief = nimData.choices[0].message.content;
+      return res.json({ status: "success", brief: brief });
+    } catch (e) {
+      console.error(`[Library Warning] Exa/NIM search failed, falling back to static research: ${e.message}`);
+    }
+  }
+  
+  let fallbackBrief = `### Stoichiometry & Chemical Calculator Roadmap
+- **Molar Mass Calculator:** Computes molar mass of compounds using atomic weights (e.g. H=1.008, O=15.999). Formula parser handles parentheses: Ca(NO3)2.
+- **Stoichiometry Solver:** Computes limiting reactant, theoretical yield, and percent yield for balanced equations (e.g. 2H2 + O2 -> 2H2O).
+- **Gas Law Calculators:** Ideals gas law (PV=nRT), Charles Law, Boyles Law.
+- **Solution Concentrations:** Molarity (M), Molality (m), Mass Percent.
+- **Equation Balancer:** Direct linear algebra balancing using fraction results to prevent rounding issues.`;
+  
+  return res.json({ status: "success", brief: fallbackBrief });
+});
+
 app.listen(PORT, () => {
   console.log(`SSE MCP Host listening on port ${PORT}`);
 });