Castos MCP by usefulapi MCP Server

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answering

Castos MCP by usefulapi is answering right now. Last checked 8 min ago. It exposes 14 tools. Last commit 8 Nov 2026.

Read podcasts and episodes; create and update episodes; manage private subscribers in Castos.

Uptime history 9 hours of history

9 hours agonow

100.0%

Uptime 24h

29 of 29 checks

Tools

read from the server

256 ms

Response time

average over 24h

Stars

last commit 8 Nov 2026

Nothing serious here today

Today is the operative word: we check Castos MCP by usefulapi every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 8 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add castos --transport http https://castos.usefulapi.io/mcp

Settings → Connectors → Add custom connector, then paste this address

https://castos.usefulapi.io/mcp

~/.codex/config.toml

[mcp_servers.castos]
url = "https://castos.usefulapi.io/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "castos": {
      "url": "https://castos.usefulapi.io/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "castos": {
      "type": "http",
      "url": "https://castos.usefulapi.io/mcp"
    }
  }
}

Available tools 14

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

castos

castos_create_episode

WRITE. Add a new episode to a podcast. The audio is downloaded from episode_file_url (https, up to 40 MB) and uploaded to Castos. The episode may publish to the live feed at once, so check the publish date. Castos API: POST /podcasts/{podcast_id}/episodes (multipart).

castos_create_private_subscriber

WRITE. Add an email address as a private subscriber of a podcast, so it can access the private feed. Castos API: POST /private-subscribers.

castos_get_episode

Get one episode of a podcast by id, with its title, notes and audio details. Castos API: GET /podcasts/{podcast_id}/episodes/{episode_id}.

castos_get_podcast

Get one podcast by id, with its settings and metadata. Castos API: GET /podcasts/{podcast_id}.

castos_get_private_subscriber

Get one private subscriber by subscriber id. Castos API: GET /private-subscribers/{subscriber_id}.

castos_get_private_subscriber_by_email

Find a private subscriber by email. The reply lists the subscriber and its subscriptions; the subscription id is what castos_revoke_private_subscriber needs. Castos API: GET /private-subscribers/email/{email_address}.

castos_list_categories

List the podcast categories that Castos accepts for the itunes_category fields. Castos API: GET /get-categories.

castos_list_episodes

List the episodes of one podcast, with id, title, created date and publish date. Castos API: GET /podcasts/{podcast_id}/episodes.

castos_list_podcasts

List the podcasts on the authenticated Castos account, with title, description, language and feed settings. Castos API: GET /podcasts.

castos_list_private_subscribers

List the private subscribers of one podcast, one page at a time. Castos API: GET /private-subscribers.

castos_reactivate_private_subscriber

WRITE. Reactivate a private subscriber by subscriber id, for example after a revoke by mistake. Castos API: POST /private-subscribers/reactivate/{subscriber_id}.

castos_revoke_private_subscriber

WRITE. Cancel one private subscription, so the subscriber loses access to that private feed. Pass the subscription id (see castos_get_private_subscriber_by_email). Castos API: POST /private-subscribers/{subscription_id}.

castos_update_episode

WRITE. Change the text or settings of an existing episode. Only the fields you pass are sent. To replace the audio, pass updated_episode_file as a public https URL. Castos API: POST /podcasts/{podcast_id}/episodes/{episode_id}.

castos_update_podcast

WRITE. Change the metadata of an existing podcast. Only the fields you pass are sent. It does not change the cover image, the feed redirect or the episodes. Castos API: POST /podcasts/{podcast_id}.

Endpoints

URL	Transport	State	Latency	Checked
https://castos.usefulapi.io/mcp	streamable-http	answering	300 ms	8 min ago

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Castos MCP by usefulapi — questions

Answers built from our own checks of this server.

What can Castos MCP by usefulapi do?

It exposes 14 tools, read directly from the server on our last check. Among them: castos_create_episode, castos_create_private_subscriber, castos_get_episode, castos_get_podcast, castos_get_private_subscriber, castos_get_private_subscriber_by_email and 8 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Castos MCP by usefulapi working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 29 of 29 checks got a reply (100.0%), average response time 256 ms. The bar chart above shows every period we have measured.

How do I connect Castos MCP by usefulapi?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Castos MCP by usefulapi need an API key?

No. Castos MCP by usefulapi completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 14 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Castos MCP by usefulapi?

It answers our handshake in 256 ms on average, which is faster than 54% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is Castos MCP by usefulapi open source?

The code is open source: it is published under the MIT licence, written in JavaScript, 1 stars on GitHub and 1 open issue. The licence covers the code in the repository, not the hosted service at castos.usefulapi.io, which runs on its operator's own terms.