Same account as the AI 2nd Line app. Create one here if you don't have one —
you don't need the app to get an API key.
Accept the terms first
Calls and texts you send go out on our carrier registration, shared with our
other customers. The terms set out what that means and what you're responsible for —
including anything an AI agent sends with your key.
We can't issue an API key until you accept. This is the agreement that
makes you, not us, responsible for traffic your key sends.
Copy this now. It's stored only as a
hash and can never be shown again. Lose it and you'll have to generate a new one, which
revokes this one.
Plan
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Claim a number
Pick a line for your agents to call and text from. Search by area code or city.
Your lines
The numbers a key may act on. numberId is what the API and the
MCP tools take.
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Your assistant
What answers when someone calls this line.
Off by default. Leave it off if you want every
caller identified first — turn it on if people ring mainly to ask things you’ve
already written down below.
Recommended — about a dozen states require
every party to consent to recording.
Saved
What it knows
Facts your assistant can use on a call — hours, pricing, FAQs,
anything a caller might ask.
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Business hours
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Leave every day unchecked and the line is
treated as always open — never as always closed.
Saved
Put callers through to
People your assistant can transfer a live caller to. It decides from the
description, so say when each one should be used.
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Booked for you
Appointments your assistant made on calls.
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Connected accounts
Connect a calendar and your assistant can check availability and book
appointments while it's still on the call.
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Connect it
Point an agent at the HTTP API, or connect over MCP and skip the glue code.