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Developer API for complete Supafone agents

Ship voice agents that actually work in production.

Supafone Labs is the complete agent package behind Supafone. Developers use it for two jobs: lift real-time call reliability by about 40%, and create inbound receptionists, outbound sales agents, web agents, managed numbers, stages, tools, recordings, and Supafone Pro from one API.

Increase voice agent performance by 40% — get an API key Read the API docs
GitHub pip install supafone-labs npm i supafone-labs
Performance benchmark
Live benchmark · 4 agent stacks
Internal production-style eval
+40% more reliable live calls, same stack Grok, Gemini Live, Vapi, and OpenAI Realtime agents — measured before and after Supafone Labs supervision.
86supervised score
vs 61 baseline
Score, 100 = reliable live-call handling
Grok realtime agent+45%
58 base84 supervised
Gemini Live agent+42%
60 base85 supervised
Vapi production agent+38%
64 base88 supervised
OpenAI Realtime agent+40%
62 base87 supervised
Same stack. More reliable calls.Supafone Labs adds the supervisor layer without replacing the model, voice, platform, or telephony you already picked.
~40% lift Real-time voice-agent reliability Supervisor checks catch missed tool state, policy risk, language shifts, and recovery moments before the next reply.
One package creates the agent, number, stages, and tools. Ease of use for builders Use Supafone-managed telephony and voices by default. BYOK only when a team already owns the stack.
How it works

The method, in 90 seconds.

Agent framework

Five API keys become one.

Two ways in: use the voice watcher to lift the performance of the stack you already run, or use our agent builder out of the box. Either way, supafone-labs collapses Twilio, Cartesia TTS, STT, and Claude supervision into a single key — simpler agent building, production ready.

InboundCreate a receptionist or intake agent with stages, tools, and call routing already wired.
OutboundCreate a sales or speed-to-lead agent with the right campaign preset and caller ID path.
Managed numbersSearch, buy, and assign numbers through Supafone. No developer Twilio account or carrier setup required.
BYOK when neededBring Twilio, Telnyx, Plivo, SIP, or a custom stack only if you already have one.
TypeScript
import { Supafone } from "supafone-labs"; const supafone = new Supafone({ apiKey: process.env.SUPAFONE_API_KEY! }); const agent = await supafone.labs.agents.createInboundWithNumber({ agentKey: "northline-intake", name: "Northline intake", assistantName: "Maya", websiteUrl: "https://northline.example", number: { search: { areaCode: "415" } }, labs: { enabled: true, model: "gemma" }, }); console.log(agent.number?.number.phone_number);
Hosted agent docs Wrap your own stack

Works with your entire stack.

Agent platform, model, speech, and telephony. Supafone Labs sits beside what you already run.

Pricing

Free to start. Minutes, not seats.

Open source

$0 forever
  • The whole thing, MIT
  • Bring your own AI keys
GitHub

Cloud

5 min free then pay as you go
  • We host the models & voices — one key
  • Console with every correction
  • $10 → 400 min · $49/mo → 2,000 min
Get an API key in console
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