Which way in?
I run a business
No code. Connect your number in the dashboard and your agent answers the phone in about five minutes.
I'm a developer
Create agents, connect numbers and place calls over a REST API, an SDK, the CLI or MCP.
Why Nixflex
Fast enough to feel human
First audio in about half a second, so the caller talks instead of waiting.
Your carrier, your numbers
Twilio or Telnyx, in your own account. Nixflex never resells or marks up your numbers, and every customer can bring their own.
One number, calls and texts
The same number answers the phone and replies to texts. No separate chat bot to build.
Listen to a live call
Live Monitor streams a call in progress to your phone or tablet - possible because the engine is ours.
The agent knows the caller
Name, email and reference from earlier calls are already in front of the agent, so nobody repeats themselves.
One agent, many businesses
A single agent can answer hundreds of numbers, each with its own details, voice, calendar and webhook.
What can it do?
Inbound and outbound calls · cold and warm transfers · texts during and after a call · AI replies to incoming texts · live call monitoring · voicemail detection on outbound · batch call and SMS campaigns · calendar bookings mid-call · custom functions that call your own systems · a written summary, sentiment and extracted fields after every call · 30 languages. Every one of these works the same from the dashboard or the API.What does it cost?
Pay as you go from 0.09. Texts are billed by your own carrier at their rate. Switching features on costs nothing - you pay for the minutes you use. See Pricing.Ways to build
REST API
Every capability over HTTPS and JSON, with an OpenAPI spec.
Node.js SDK
Typed client with retries built in.
npm install nixflexPython SDK
Sync and async clients.
pip install nixflexCLI
The whole API from a terminal.
npx nixflexMCP server
Run your account from Claude Desktop, Cursor or VS Code.
Integrations
Calendars, CRMs, Slack, Zapier and webhooks - set per phone number.