A plugin that lets an AI agent call a person over a voice phone connection and have a two-way conversation. It uses self-hosted SIP, a system for internet-based calls, and Docker to run the engine.

Use it for human-in-the-loop approvals, voice conversations, and tiered agent alerts based on whether you are present at the computer.

It lets the agent request a human decision by phone when the person is away from the keyboard, with alerts arranged by urgency.

ringback — Plugin by mohitbadwal

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Claude Code

/plugin marketplace add mohitbadwal/ringback

agentmods

npx agentmods add plugins/mohitbadwal/ringback/plugin

Clone the repo

git clone --depth 1 https://github.com/mohitbadwal/ringback

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

ringback scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugin/.claude-plugin/plugin.json · 86 lines

How it starts

The opening of the file, as written. The whole thing — 86 lines — stays where its author put it; the contents beside it link to each section on GitHub.

{
  "name": "ringback",
  "displayName": "ringback — your agent calls your phone",
  "version": "0.1.0",
  "description": "Two-way voice phone calls plus tiered alerts for your AI agent, over free self-hosted SIP. The agent rings your phone and talks to you when it needs a decision, and it is presence-aware so it only calls when you are away from the keyboard. Runs the engine in Docker, so there is no local build.",
  "author": { "name": "Mohit Badwal" },
  "homepage": "https://github.com/mohitbadwal/ringback",
  "repository": "https://github.com/mohitbadwal/ringback",
  "license": "Apache-2.0",
  "keywords": [
    "mcp", "voice", "phone", "sip", "claude", "human-in-the-loop",
    "notifications", "whisper", "tts", "agent", "docker"
  ],
  "hooks": {
    "SessionStart": [
      { "hooks": [ { "type": "command", "command": "\"${CLAUDE_PLUGIN_ROOT}/bin/prepull.sh\"" } ] }
    ]
  },
  "userConfig": {
    "sip_id": {
      "type": "string",
      "title": "Your SIP address",
      "description": "Your Linphone SIP address, e.g. sip:[email protected]. This is also the phone the agent calls unless you set a different number below.",
      "required": true
    },
    "sip_user": {
      "type": "string",
      "title": "SIP username",
      "description": "Your Linphone username (the part before the @).",
      "required": true
    },
    "sip_pass": {
      "type": "string",
      "title": "SIP password",
      "description": "Your Linphone account password. Stored in your OS keychain, never in a file.",
      "sensitive": true,
      "required": true
    },
    "sip_callee": {
      "type": "string",
      "title": "Address to call (optional)",
      "description": "SIP address the agent dials. Leave blank to call your own SIP address above."
    },
    "display_name": {
      "type": "string",
      "title": "Caller-ID name (optional)",
      "description": "Name shown on your phone when the agent calls, e.g. My Claude."
    },
    "stun_server": {
      "type": "st

Read the full file on GitHub · 86 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

yesterday First seen · 86 lines scan A 8222c4697b83

Subscribe to this mod's changes

ringback is a plugin published in the GitHub repository mohitbadwal/ringback (21 stars, last pushed 2mo ago), licensed Apache-2.0. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Data and AI DevOps and cloud LLM ai-agents anthropic claude macos mcp

ringback

Getting it into your agent

Grade A, and why

Nothing flagged

How it starts

What this file has done since we first saw it

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