The developer workshop for voice.
Quickstarts, SDKs, reference, and recipes. Ship your first call in under five minutes — or wire up an AI agent before lunch.
From zero to first call.
Install the SDK
Pick a language. Every SDK ships typed clients, webhooks helpers, and a streaming runtime.
npm install @rozper/sdkAuthenticate
Create a project key in your dashboard. Keep server keys server-side.
import { Rozper } from "@rozper/sdk"
const rozper = new Rozper({
apiKey: process.env.ROZPER_API_KEY,
})Place your first call
Two lines. The PSTN is now an API.
await rozper.calls.create({
to: "+14155551234",
from: "+12025550100",
url: "https://your.app/voice/answer",
})Every guide, organized like your repo.
Pick a path. Finish it in a sitting.
Opinionated, end-to-end tutorials. No dead ends, no half-explained steps — just the path of least resistance to a shipped feature.
Voice fundamentals
Become productive with calls, recordings, and webhooks in under an afternoon.
- 1Setup & authentication
- 2Place & receive calls
- 3Recordings & transcripts
- 4Webhooks & TwiML-style verbs
- 5Going to production
Ship an AI voice agent
Sub-300ms latency, tool calling, escalation, and analytics. End-to-end.
- 1Pick a voice & persona
- 2Connect your knowledge base
- 3Define tools the agent can call
- 4Live transfer to a human
- 5Measure resolution
Global scale-out
Number provisioning, regional pinning, and routing across 150+ countries.
- 1Buying numbers programmatically
- 2Compliance & local presence
- 3Regional pinning
- 4Failover & least-cost routing
- 5Reporting at scale
Drop in. Type-safe. Production-ready.
All SDKs share the same surface area — switching languages doesn't mean relearning the platform.
Built and maintained in the open.
Developer Discord
5,000+ devs. Engineers from the platform team answer in <1h business hours.
Open source
All SDKs, examples, and the docs site itself. PRs welcome.
Recipes & examples
200+ copy-paste recipes for common patterns — webhooks, retries, streaming.
Premium support
Dedicated Slack channel and a 15-min response SLA for Scale & Enterprise.
Questions before you start building.
Ready to make your first call?
Grab an API key and place a test call in minutes, or talk to an engineer about your integration.