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2 Days to MVP: No-Code AI Call Agent (BYOK + Direct OpenAI SIP)

Hey Indie Hackers! 👋 Been geeking out on your AI and no-code threads (that $40K MRR My AskAI post—wild!). I’m a full-stack dev, and with Claude 4.5 + Copilot, I built a no-code wrapper for OpenAI’s Realtime API + Telnyx SIP in 2 days. It’s BYOK for full control, direct SIP-to-OpenAI for ultra-low latency, and skips third-party bloat. Here’s the scoop—roast it or join the beta!

The Pain

Non-coders want AI call agents (support, bookings, lead qual), but OpenAI’s Realtime API webhooks are brutal—hours of setup, third-party middlemen jacking up latency and costs. I wanted a <7-min solution with full control, no extra platforms.

What I Built

A web app for AI voice agents:

  • One-Click Setup: Enter your OpenAI key (BYOK), pick a phone number, voice (e.g., alloy), live in <7 mins.
  • Direct Integration: Telnyx SIP straight to OpenAI Realtime API—sub-200ms latency, no third-party cruft.
  • Custom Functions: direct webhok link to n8n/Zapier (Google Calendar, HubSpot), etc
  • Call Logs: Transcripts, function calls, analytics (duration, cost).
  • Stack: Laravel 12 (DaisyUI/Tailwind), Node.js (Hono), MySQL, Telnyx SIP.

Claude 4.5’s Role

  • Wrote 90% of backend (Node.js/Hono) and Laravel Blade UI. Prompt: “Generate direct Telnyx-to-OpenAI SIP routing.”
  • Copilot nailed real-time transcript UI.
  • Mistake: Botched WebSocket reconnects—Claude 4.5 fixed it in 10 mins.

Why BYOK & Direct?

  • Full Control: Your OpenAI key, your rules—no sharing with third parties.
  • Ultra-Low Latency: Direct SIP cuts delays (tested at 150-200ms vs. 500ms+ with middlemen like Retell).
  • No Bloat: Skip extra platforms, save costs, own your data.

Where I’m At

MVP’s live—3 non-coders got agents running in 6 mins! Aiming for $500 MRR at $9/mo.

What I Need

  • What’s your worst AI voice setup pain (latency, third parties)?
  • Non-coders: Must-have integrations (CRM, SMS)?
  • Beta testers! DM for free access (20 spots, <7-min setup, BYOK).

what am I missing? 🙏 #AI #NoCode

posted to Icon for group Building in Public
Building in Public
on October 23, 2025
  1. 1

    This is incredibly impressive! Building a no-code wrapper for the OpenAI Realtime API in 2 days is a testament to your skills and the power of AI tools like Claude 4.5 and Copilot.

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