"""youtube-helper: Model Context Protocol (MCP) surface.
A thin adapter that exposes the FastAPI app from :mod:`youtube_helper.api` as
MCP tools, so any MCP-aware host (an agent runtime, an IDE integration, a
custom shell) can call the yt-dlp-backed operations — resolving direct media
URLs, browsing stream catalogs, downloading video/audio/thumbnails/subtitles,
and pulling no-API engagement metadata (channel/video/comments) across
YouTube, Vimeo, DailyMotion, Twitch VOD, SoundCloud, and any yt-dlp-supported
source — as first-class tools. Uses `fastapi-mcp`
(https://github.com/tadata-org/fastapi_mcp): one wrapper publishes the whole
existing HTTP surface, so the routes are never duplicated.
Install the extra to pull in ``fastapi-mcp``::
pip install "youtube-helper[mcp]"
Then run the server (HTTP API + MCP endpoint at ``/mcp``)::
youtube-helper-mcp # console entry point
python -m youtube_helper.mcp # equivalent
Author
------
Warith Harchaoui, Ph.D. — https://linkedin.com/in/warith-harchaoui/
"""
from __future__ import annotations
try:
from fastapi_mcp import FastApiMCP
except ImportError as exc: # pragma: no cover - exercised only without the extra
raise ImportError(
'The MCP surface needs the [mcp] extra: pip install "youtube-helper[mcp]"'
) from exc
# Reuse the exact same FastAPI app: MCP is a thin wrapper on top, no new routes.
from youtube_helper.api import app
# Publish the HTTP endpoints (metadata / resolve / streams / downloads / engagement) as MCP tools.
mcp = FastApiMCP(
app,
name="youtube-helper",
description=(
"youtube-helper MCP tools: a yt-dlp wrapper for downloading videos, "
"audio, thumbnails and subtitles, resolving direct media URLs, "
"browsing stream catalogs, and pulling no-API engagement metadata "
"(channel / video / comments) on YouTube, Vimeo, DailyMotion, "
"Twitch VOD, SoundCloud, and any yt-dlp-supported source."
),
)
# Newer fastapi-mcp splits mount() into transport-specific mount_http(); fall back to
# the legacy mount() so a range of fastapi-mcp versions keeps working.
if hasattr(mcp, "mount_http"):
mcp.mount_http()
else: # pragma: no cover - legacy fastapi-mcp
mcp.mount()
[docs]
def main() -> None:
"""Console entry point (``youtube-helper-mcp``): serve the API + MCP endpoint.
Boots the FastAPI app (now serving both the ``/...`` HTTP routes and the
``/mcp`` MCP endpoint) with uvicorn in a single worker. Local-first: binds
to loopback by default (override with ``YOUTUBE_HELPER_HOST`` /
``YOUTUBE_HELPER_PORT``).
"""
import os
import uvicorn
host = os.environ.get("YOUTUBE_HELPER_HOST", "127.0.0.1")
port = int(os.environ.get("YOUTUBE_HELPER_PORT", "8000"))
print(f"YouTube Helper API + MCP -> http://{host}:{port} (MCP at /mcp)")
uvicorn.run(app, host=host, port=port, workers=1)
if __name__ == "__main__": # pragma: no cover
main()