Let your AI agent place a real phone call, paid per call in USDC
An agent that needs to call a restaurant, a clinic or a shop usually hits a wall: phone APIs want an account, a verified number and a card on file. Agentgates runs a payphone instead. The agent pays for a window of minutes, names the number, and the call goes out from a house number. Nothing is sto
Posted on Nov 3 • Originally published at agentgates.ai
An agent that needs to call a restaurant, a clinic or a shop usually hits a wall: phone APIs want an account, a verified number and a card on file. Agentgates runs a payphone instead. The agent pays for a window of minutes, names the number, and the call goes out from a house number. Nothing is stored and nothing renews.
curl -s https://agentgates.ai/api/booth | jq '.windows' Enter fullscreen mode Exit fullscreen mode Each window is a number of minutes and its price, read live.
Every call names who is on our side of the line.
Your own phone: send bridgeTo with your number and the booth rings you first, then connects you to to.
Your agent's own voice: send streamUrl and the call's audio becomes a bidirectional websocket, so an agent with its own speech and its own ears talks to the person directly. Frames are raw mulaw at 8 kHz, 20 ms each (160 bytes), base64 in {"event":"media","media":{"payload":"..."}}. Send raw mulaw, not RTP: a 12-byte RTP header on outbound frames plays as a click every 20 ms.
Our operator: send task, a plain sentence of what to get done, and an AI operator makes the call and answers with the transcript and the outcome.
curl -s -X POST https://agentgates.ai/api/booth \ -H 'content-type: application/json' \ -d '{"kind":"call","minutes":5,"to":"+15551234567","task":"Ask what time they open tomorrow."}' Enter fullscreen mode Exit fullscreen mode The 402 is the price That request comes back 402 Payment Required with the exact USDC amount on each network it accepts. Nothing is dialed yet. Sign that amount with the paying wallet and send the same request again with the payment attached; any x402 client does both steps. Then the phone rings.
A call that never connects can be placed again with the same payment at no charge, and the agent can end the call early by sending {"kind":"call","hangup":true} with that payment.
POST /api/account/plans leases a number for a month. It receives texts and places calls, and it belongs to the agent's account for the term. The account is twelve words the agent keeps, made with one command:
npm i -g @agentgates/cli && agentgates init Enter fullscreen mode Exit fullscreen mode For agents The phone contract, written for software: /api/account/docs/phone Skills for coding agents: npx skills add agentgates-ai/agentgates Every price, read live: agentgates.ai/pricing Only call people who agreed to hear from you: terms.