Vistara AI + Replit Integration

Integrate Voice AI with Replit in Seconds

Build full-stack AI voice calling applications in Replit with Replit Agent. Effortlessly equip your project with low-latency (450–600 ms) conversational telephony simply by copying and pasting the master prompt below into Replit.

Replit & Replit Agent Master Prompt

Production Telephony & Voice Agent Prompt Ready

The prompt contains complete knowledge of the Vistara Connect REST API, low-latency Hindi telephony defaults, voice agent craftsmanship guidelines, and an automated flow to trigger a live test call to your personal mobile phone.

Download as .md File

Coding agents work best with the file: save it in your project (for example as VISTARA.md) and ask Replit to follow it.

1-Click Copy No Manual SDK Config Required Live Phone Call Experience Included Up to 200 free calls on Signup

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Interactive Telephony Workflow

What Happens When You Paste This Prompt into Replit

STEP 01

Account Verification

Replit asks if you are registered at app.vistaraai.in. If new, it guides you through phone OTP sign-up — ₹150 free credit with GSTIN (₹50 without) — up to 200 calls, since unanswered calls are never charged.

STEP 02

Agent Query & Selection

Uses your API key to list your existing voice agents. You can pick an active agent or let Replit construct a brand new dedicated persona.

STEP 03

Voice Prompt Craftsmanship

Constructs a 10-section prompt with native Devanagari Hindi spoken text, phone conversation mechanics, objection handling, and CRM deliverables.

STEP 04

Live Phone Test Call

Asks for your mobile number and dispatches a priority test call (x-call-type: test). Your phone rings immediately so you experience the AI conversation live!

STEP 05

Codebase Scaffolding

Scaffolds clean outbound call dispatchers, webhook receivers for post-call transcripts, rate-limiting guards, and .env files directly in your repository.

Developer Telephony Specs

Under the Hood: Vistara Connect REST Architecture

Everything Replit will wire up into your backend application:

Programmatic Agent Management (GET, POST, PUT /api/v1/agents)

Manage conversational agent lifecycles via REST. Agents default to Hindi with native Indian speech synthesis (meera or Aoede).

// Create Voice Agent (100 req/min limit)
curl -X POST https://app.vistaraai.in/api/v1/agents \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Customer Support RM",
    "language": "Hindi",
    "calling_method": "traditional",
    "voice": "meera",
    "first_message": "नमस्ते {{customer_name}} जी! मैं आपकी क्या सहायता कर सकती हूँ?",
    "system_instruction": "You are a courteous, expert AI support assistant...",
    "deliverables": [
      { "question": "Was customer interested?", "type": "fixed", "options": "Yes, No", "isGoal": true, "goalValue": "Yes" }
    ]
  }'

Replit Integration FAQ

How do I add AI calling to my app with Replit?

Copy the Vistara AI integration prompt on this page and paste it into Replit, or save it in your project as VISTARA.md and ask Replit to follow it. Replit then checks your Vistara account and API key, helps you create a voice agent, places a test call to your own phone, and writes the code that starts calls and receives each call's transcript, summary and extracted answers by webhook.

Where do I put my Vistara API key in Replit?

In the Repl's Secrets, as VISTARA_API_KEY (and VISTARA_WEBHOOK_TOKEN for the webhook). Replit Agent reads them from there and never writes them into code. Use the Repl's public URL as the webhook URL while you develop.

Is my Vistara API key safe?

The prompt never contains your key. Replit is told to read it from the VISTARA_API_KEY environment variable, keep it out of source files, examples and logs, and use it only on the server — never in browser or mobile app code.

How much does it cost to try?

The prompt is free. New Vistara AI accounts get ₹150 free credit with GSTIN (₹50 without) — up to 200 calls, since unanswered calls are never charged. After that, calls are billed per connected minute from your prepaid wallet.

Ready to integrate voice AI into your product?

Sign up in under 60 seconds with your mobile number and get your live API key — plus ₹150 free credit with GSTIN (₹50 without) — up to 200 calls, since unanswered calls are never charged.

Claim Free Credit