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+# Gemini Consultation: Technic API 401 Unauthorized Fix
+
+**Date:** April 6, 2026  
+**Chronicler:** #63  
+**Task:** #26 ModpackChecker Phase 5 Deployment
+
+---
+
+## The Problem
+
+Technic API was returning `401 Unauthorized` for all requests:
+
+```php
+$response = Http::get('https://api.technicpack.net/modpack/tekkit?build=1');
+// Returns: {"status":401,"error":"Unauthorized"}
+```
+
+We initially suspected authentication requirements had changed.
+
+---
+
+## Gemini's Diagnosis
+
+**It wasn't authentication — it was version control.**
+
+Technic actively blocks requests claiming to come from ancient or deprecated launcher builds. By hardcoding `?build=1`, we were telling the API we're using build #1 of the Technic Launcher. The API rejects this outdated build number.
+
+The current stable build number is in the high 700s/800s.
+
+---
+
+## The "RV-Ready" Fix
+
+Instead of hardcoding a higher number (which could eventually be deprecated too), we dynamically fetch the current build number:
+
+```php
+private function checkTechnic(string $slug): array
+{
+    // Step 1: Get current stable launcher build number
+    $versionResponse = Http::get('https://api.technicpack.net/launcher/version/stable4');
+    $latestBuild = $versionResponse->successful() 
+        ? ($versionResponse->json('build') ?? 999) 
+        : 999; // Fallback to high number if version check fails
+    
+    // Step 2: Fetch modpack data with valid build number
+    $response = Http::withHeaders([
+        'User-Agent' => 'FirefrostGaming/ModpackChecker/1.0',
+        'Accept' => 'application/json',
+    ])->get("https://api.technicpack.net/modpack/{$slug}?build={$latestBuild}");
+
+    if (!$response->successful()) {
+        throw new \Exception('Technic API request failed: ' . $response->status());
+    }
+
+    $data = $response->json();
+
+    return [
+        'name' => $data['displayName'] ?? $data['name'] ?? 'Unknown',
+        'version' => $data['version'] ?? 'Unknown',
+    ];
+}
+```
+
+---
+
+## Why "RV-Ready"?
+
+This approach requires **zero ongoing maintenance**. As Technic updates their launcher versions, our extension automatically mimics the latest official launcher — no code changes needed.
+
+---
+
+## Key Endpoints
+
+| Endpoint | Purpose |
+|----------|---------|
+| `https://api.technicpack.net/launcher/version/stable4` | Get current launcher build number |
+| `https://api.technicpack.net/modpack/{slug}?build={N}` | Get modpack info with valid build |
+
+---
+
+## Result
+
+All 4 platforms now working:
+- ✅ Modrinth
+- ✅ FTB
+- ✅ CurseForge
+- ✅ Technic