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Integration Guide·May 1, 2026·8 min read

How to Automate Your Business Phone with AI: API Setup Guide

Every missed call is missed revenue. AI receptionists can answer your business phone 24/7, book appointments, and handle FAQs — and you can set one up programmatically in under 5 minutes using a REST API. Here's how.

Why Automate Your Business Phone?

Service businesses — dental offices, HVAC companies, law firms, insurance agencies — still close most of their revenue over the phone. But phones are unpredictable. Calls come in during lunch, after hours, on weekends, and in the middle of other calls. Every unanswered call is a customer who will try your competitor next.

Traditional solutions (hiring more staff, outsourcing to answering services) are expensive and don't scale. A full-time receptionist costs $35,000–$50,000/year. Live answering services charge $300–$800/month and still put callers on hold.

AI receptionists change the equation. They answer instantly, 24/7, with natural-sounding voice. They know your business, your hours, your services. They book appointments directly into your calendar. And they cost a fraction of the alternatives — starting at $0/month for 30 minutes.

The API Approach: Programmatic Phone Automation

Most AI receptionist platforms require you to manually configure everything through a web dashboard. That works for a single business, but it doesn't work if you're building AI into a larger workflow — like a CRM that automatically provisions phone lines for new clients, or an operations platform that spins up AI answering for seasonal demand.

The API approach lets you automate the entire lifecycle programmatically:

  • Provision accounts — create new AI receptionist instances on demand
  • Configure behavior — set business name, hours, greeting, call handling mode, industry, FAQ
  • Assign phone numbers — pick a local or toll-free number from available inventory
  • Monitor calls — pull call history, transcripts, and summaries programmatically
  • Update settings — change configuration in real time as business needs evolve

This is especially powerful for AI agents and LLMs that can orchestrate the entire setup on behalf of a user — from account creation to going live — without any manual steps.

How It Works: HireJosie's LLM API

HireJosie's LLM API is a REST API designed specifically for programmatic access by AI agents, LLMs, and automation platforms. The base URL is api.hirejosie.ai and authentication uses Bearer tokens with API keys in the format hj_live_<key>.

Step 1: Request an API Key

Send a POST request with the user's email. HireJosie will email them an API key (viewable once for security).

POST https://api.hirejosie.ai/llm/request-access
Content-Type: application/json

{ "email": "owner@mybusiness.com" }

Step 2: Pick a Phone Number

Query available phone numbers by country and area code. The API returns numbers ready for immediate assignment.

GET https://api.hirejosie.ai/llm/available-numbers?country=US&areaCode=512
Authorization: Bearer hj_live_<key>

Step 3: Configure the AI Receptionist

Send business details, select a phone number, and configure how the AI handles calls. The AI starts answering immediately.

PUT https://api.hirejosie.ai/llm/configure
Authorization: Bearer hj_live_<key>
Content-Type: application/json

{
  "businessName": "Bright Smile Dental",
  "phoneNumber": "+15125551234",
  "industry": "dental",
  "timezone": "America/Chicago",
  "businessHours": {
    "monday": { "open": "08:00", "close": "17:00" },
    "tuesday": { "open": "08:00", "close": "17:00" }
  },
  "callHandlingMode": "ring-first"
}

Step 4: Monitor and Iterate

Pull call logs with full transcripts to understand how the AI is performing. Use the data to refine your greeting, FAQ, or call handling settings.

GET https://api.hirejosie.ai/llm/calls?limit=10
Authorization: Bearer hj_live_<key>

Real-World Automation Scenarios

CRM Integration

When a new client signs up in your CRM, automatically provision an AI receptionist with their business details and a local phone number. The client gets a fully configured AI phone agent without filling out a single form.

Seasonal Scaling

HVAC companies can programmatically switch call handling modes when demand spikes — routing overflow to AI during peak season, then reverting to ring-first during slower months. No manual dashboard clicks needed.

Multi-Location Management

Franchise operators or agencies managing multiple businesses can configure and monitor AI receptionists for all locations through a single API, pulling call data across the portfolio for centralized reporting.

AI Agent Orchestration

LLMs and AI agents can use the API to set up phone automation on behalf of users conversationally. A user tells their AI assistant "set up a phone line for my business," and the agent handles account creation, number selection, and configuration — end to end.

What the AI Receptionist Actually Does

Once configured, the AI receptionist handles inbound calls with these capabilities:

  • Natural voice conversation — sounds like a real person, not a robot or IVR menu
  • Appointment booking — checks Google Calendar availability and books directly
  • Industry-specific knowledge — understands dental, HVAC, legal, insurance terminology and common questions
  • Call handling modes — AI-only, ring your phone first, transfer on request, or transfer during business hours
  • Post-call summaries — email with transcript, caller intent, and action items
  • SMS follow-up — sends the caller a text with relevant info after the call

Pricing for API Access

The API uses the same pricing as the web product — there's no separate API tier or premium:

  • Free plan: $0/month — 30 AI minutes, dedicated phone number, 24/7 answering, email summaries, call transcripts. No credit card required.
  • Pro plan: $49/month — 500 AI minutes, Google Calendar integration, SMS follow-ups, custom branding.

API keys expire after 30 days and can be refreshed programmatically via the /llm/refresh-key endpoint.

Getting Started

The full API reference — including all endpoints, request/response shapes, example flows, and a debugging guide — is available at hirejosie.ai/llm-integration. The API documentation follows the llms.txt convention, so any LLM or AI agent can read it directly.

If you're building automation, integrations, or AI workflows that need phone answering, the API is the fastest path from zero to live calls. Setup takes under 5 minutes, the free tier is genuinely free, and the AI starts answering the moment you configure it.

Automate your business phone in 5 minutes

Read the full API docs and start building. Free tier, no credit card.