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Agentline.cloud

AI Agent Telephony Core Skill

Install & Use

Copy this prompt and send it to your AI assistant (Claude / Cursor / TRAE / Codex / WorkBuddy etc.) to auto-install:

Help me install this AI Skill: Agentline.cloud.
It is used for: AI Agent Telephony Core Skill
Full Skill content: https://321skill.com/skills/agentline-cloud-x/raw/index.md
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This Skill addresses the issue where AI agents cannot directly make phone calls, receive SMS, or manage phone numbers. In practical development, developers often need to equip AI assistants with real telephony capabilities, but traditional telephony APIs require servers, webhooks, and infrastructure, making integration complex. AgentLine encapsulates all of this into natural language instructions. Developers only need an API Key to give their AI agents complete phone functionality.

Usage is straightforward: you simply obtain an AGENTLINE_API_KEY, then use POST requests to create an Agent, purchase a number, and set up the voice, before finally starting the background event polling. After that, you can use natural language instructions to make calls, view SMS, manage agents, and query billing. For example, telling the AI "Call Zhang San" will automatically trigger the API to complete the outbound call.

It is well-suited for teams or individuals requiring outbound telephony functionality, especially those already using AI agents (like Claude) for automated workflows but needing to integrate the phone channel for customer service, sales, or operations scenarios. Examples include automatically calling to confirm customer orders, optimizing tele-sales processes, and managing number configurations for multiple outbound agents.

It is recommended to strictly follow the step-by-step sequence in the README during the first use, particularly not skipping the background event polling (otherwise, all incoming calls and SMS will be missed). Note that it primarily relies on the AgentLine cloud service; number availability depends on the region, and the polling process needs to be kept running continuously.

Key Features

Unlike traditional telephony APIs such as Twilio, AgentLine is designed specifically for AI agents. It requires no servers or webhooks, operates entirely through natural language instructions and REST APIs, and features a built-in hosted voice conversation mode where the AI can automatically handle calls and return transcripts.

Limitations

Relies on the AgentLine cloud service (`AGENTLINE_API_KEY`), requires a continuously running background event polling process, number availability is limited by the selected region, and the system prompt is not persisted by default and must be passed with each invocation.

FAQ

How do I obtain an AGENTLINE_API_KEY?

Please go to https://agentline.cloud to register or log in, then generate an API Key in the dashboard. It will start with `sk_live_`.

How do I set the AI's voice gender?

After creating an Agent, use `PATCH /v1/agents/{agent_id}` to set the `voice_id`. Options include: `female-1` (female voice), `female-2` (warm female voice), `male-1` (male voice), or you can use any Cartesia voice UUID.

Installation guide for AI assistants

If your AI coding assistant (Claude Code, Cursor, TRAE etc.) can see this page, send it this message to auto-install:

Visit https://321skill.com/skills/agentline-cloud-x/raw/index.md to read the original Skill definition (Markdown format) for Agentline.cloud, and install it according to the instructions.