"""Podcast Helper: Model Context Protocol (MCP) surface.
A thin adapter that exposes the FastAPI app from :mod:`podcast_helper.api` as
MCP tools, so any MCP-aware host (an agent runtime, an IDE integration, a
custom shell) can call podcast-helper's universal audio-stream-consumer
operations (feed introspection, URL classification, PCM streaming, server-side
archiving) as first-class tools — local files, direct audio URLs, RSS feed
enclosures, and any yt-dlp-supported source, all with URL-in -> PCM-out
semantics. 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 "podcast-helper[mcp]"
Then run the server (HTTP API + MCP endpoint at ``/mcp``)::
podcast-helper-mcp # console entry point
python -m podcast_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 "podcast-helper[mcp]"'
) from exc
# Reuse the exact same FastAPI app: MCP is a thin wrapper on top, no new routes.
from podcast_helper.api import app
# Publish the HTTP endpoints (feed / latest / probe / stream / record) as MCP tools.
mcp = FastApiMCP(
app,
name="podcast-helper",
description=(
"podcast-helper MCP tools: a universal audio stream consumer. "
"Introspect RSS/Atom feeds (feed, latest), classify any URL "
"(probe: file / direct / rss / yt-dlp-<extractor>), stream raw f32le "
"PCM from any audio-bearing source, or archive one to a compressed "
"file server-side (record) — local files, direct audio URLs, RSS "
"enclosures, and any yt-dlp-supported source (YouTube, Vimeo, Twitch, "
"SoundCloud, ...), entirely on the local machine."
),
)
# 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 (``podcast-helper-mcp``): serve the API + MCP endpoint.
Boots the FastAPI app (now serving both the plain HTTP routes and the
``/mcp`` MCP endpoint) with uvicorn in a single worker. Local-first: binds
to loopback by default (override with ``PODCAST_HELPER_HOST`` /
``PODCAST_HELPER_PORT``).
"""
import os
import uvicorn
host = os.environ.get("PODCAST_HELPER_HOST", "127.0.0.1")
port = int(os.environ.get("PODCAST_HELPER_PORT", "8000"))
print(f"Podcast 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()