Call Copilot MCP server

Call Copilot

One thing. Done really well. Record meetings. Save transcripts. Don't break audio.

<!-- mcp-name: io.github.AnisurRahmann/call-copilot -->

Call Copilot is a terminal command (rec) that records your meeting audio and, when you stop it, transcribes locally and saves a clean markdown transcript. Everything runs on your machine — no cloud, no API keys, no account. Audio and transcripts never leave the computer.

$ rec setup         # one-time: verify macOS + grant capture permission
$ rec start         # starts recording, you keep working
$ rec stop          # stops, transcribes, saves markdown
$ rec list          # shows past recordings

How it captures audio (no BlackHole, no Multi-Output Device)

By default, rec captures both the microphone (your voice) AND system audio (other participants / anything apps play) — so a real meeting where you speak gets recorded, not just the audio coming out of your speakers. Both sources are tapped directly via Apple's Core Audio taps API (macOS 14.2+) using the audiotap library. There is:

produce when routing breaks.

• no virtual audio driver to install (no BlackHole),
• no Multi-Output Device to create in Audio MIDI Setup,
• no system output device to switch and restore,
• and therefore no silent-recording failure that the old driver-based approaches

The mic and system streams are recorded as two separate WAVs (each at its own true rate), transcribed separately, and merged into one transcript with [Mic] / [System] labels so you can tell who said what. Want just one source? rec start --mic-only or --system-only.

Grant capture permission (one-time, per terminal app)

macOS ties capture permission to the app you run rec from (Terminal, iTerm, Warp, VS Code, …). You need two grants:

enable your terminal app.

1. Microphone (your voice): System Settings → Privacy & Security → Microphone →

Privacy & Security → Screen Recording → enable your terminal app, then quit and reopen it (required for the change to take effect).

1. System audio (grouped under Screen Recording on macOS 14.2+): System Settings →

Until mic is granted, rec start records system audio only and skips the mic (it tells you so). rec setup checks the current mic-permission status.

After rec stop (or Ctrl+C from rec start), the recording(s) are transcribed locally with faster-whisper (CPU, int8 — no API, no data leaves your machine) and written to a markdown transcript.

recording.wav ──> faster-whisper (local, free) ──> transcript.md

Requirements

landed in 14.2). Apple Silicon recommended. Intel works.

• macOS 14.2 or later (Sonoma — the Core Audio process taps API rec records through

• Python 3.11+ only needed for the pipx install; the Homebrew formula brings its own.

No virtual audio driver (no BlackHole), no Multi-Output Device, no manual Audio MIDI Setup. The tap reads system output directly. rec checks the macOS version itself and refuses to run below 14.2 with a one-line message — you don't have to guess.

Install

Homebrew (recommended — no Python to manage):

brew install AnisurRahmann/tap/call-copilot

pipx (if you prefer a plain Python install, no Homebrew):

pipx install call-copilot

Either way you get a rec command on your PATH. Then jump to One-time setup.

Shortened. The full README is on GitHub.