Launch a live AI phone agent in sixty seconds.

II  ·  Quick start

Up and running in under five minutes.

Install, authenticate, create, provision, call.

npm install @oncallclerk/sdk

import OnCallClerk from '@oncallclerk/sdk'

const client = new OnCallClerk({
  apiKey: process.env.OCC_API_KEY,
})

const agent = await client.agents.create({
  business_name: 'Acme Corp',
  voice_id: 'f5HLTX707KIM4SzJYzSz',
  greeting: 'Hello, thanks for calling Acme Corp!',
  system_prompt: 'You are a helpful receptionist for Acme Corp...',
})

const number = await client.phoneNumbers.create({
  agent_id: agent.id,
  country: 'US',
})

console.log(number.phone_number)  // '+14155550123'

III  ·  Authentication

Bearer token, on every request.

All API requests require authentication via a bearer token in the Authorization header. Generate keys from your dashboard.

curl https://api.oncallclerk.com/agents \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json"

IV  ·  Explore the docs

Everything you need to build.

V  ·  Reference

Endpoints and rate limits.

VI  ·  Pricing

Pay for what works.

VII  ·  Resources

Engineering guides for voice AI builders.

How we think about latency, cost, and conversational quality. The same patterns we ship in the SDK, written up so you can audit, compare, or build your own.