I’m rolling out Merchants Virtual, an automated answering service that takes emergency plumbing and electrical calls in the UK, and I need the full Python/Flask infrastructure assembled on Replit. I will supply the voice script and have the Twilio number ready; your role is to connect every technical piece so a caller can interact seamlessly with Vapi.ai through Twilio and I can later review exactly what happened. Build a Complete AI Answering Service Backend (Vapi.ai + Twilio + Replit Dashboard) This is a "Full Stack" job (Backend + Frontend Dashboard + AI Configuration). It’s small but requires competence. Project Overview: I am building "Merchants Virtual," an AI answering service for UK emergency trades (plumbers/electricians). I need a developer to build the entire technical infrastructure. I will handle the Voice Prompt/Scripting and Phone Number procurement. You will handle everything else (Backend, Database, Dashboard, API Integrations). Budget: $500 (Fixed Price) • Time to Complete: 5 - 7 Days. o Day 1-2: Setup & Backend. o Day 3-4: Dashboard & Twilio Integration. o Day 5: Handover & Testing. Project Overview: I am building "Merchants Virtual," an AI answering service for UK emergency trades (plumbers/electricians). I need a developer to build the entire technical infrastructure. I will handle the Voice Prompt/Scripting and Phone Number procurement. You will handle everything else (Backend, Database, Dashboard, API Integrations). The Stack (Non-Negotiable): • Host: Replit (Python/Flask). • Voice AI: Vapi.ai. • Telephony: Twilio. • Database: SQLite (Simple, persistent file storage). Scope of Work (The Deliverables): 1. The Backend (Python/Flask on Replit) • Set up a Flask server with a /webhook route to receive "End of Call" reports from Vapi. • Logic: Parse the JSON payload to extract: o caller_number o transcript o summary o recording_url o urgency_score (1-10) • Routing: o If urgency_score > 7: Send SMS via Twilio + Email via SMTP. o If urgency_score < 7: Send Email only. 2. The Dashboard (Frontend) • Create a clean, mobile-responsive HTML dashboard at /dashboard. • Security: Simple Hardcoded Password Login (Environment Variable). • Features: o Table view of all calls. o Status badges (Urgent / Routine). o Audio Player: Embedded player to listen to the call recording directly from the table. o Search: Filter by date or phone number. 3. Vapi "Tool" Configuration (JSON) • I will write the system prompt (the script). • You must write the "Function Calling" definitions (JSON) for Vapi to ensure it accurately extracts: o Postcode (UK Format validation). o Urgency_Boolean (True/False). o Issue_Summary (Short text). 4. Handover & Documentation • The code must use os.environ for all API Keys (Twilio SID, Auth Token, Vapi Private Key). • Deliverable: A Replit "Join Link" or Forkable Repl. • Video Guide: A 5-minute Loom video showing me exactly where to paste my keys to make it go live. Acceptance Criteria: 1. I can simulate a call to the Vapi agent. 2. The dashboard updates instantly with the call details and audio. 3. If I simulate an emergency, I receive an SMS. 4. The code is clean, commented, and hosted on my Replit account.