Castos MCP by usefulapi

io.usefulapiPublished by usefulapi.ioOfficial publisherv1.0.1Updated Nov 7, 2026

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

The publisher's own server: Ably MCP by usefulapi

VerifiedStreamable HTTPWeb executableCommunication & CollaborationMedia & Design

Overview

AI-generated overview

Hosted Castos MCP server that lets an assistant read podcasts and episodes, create or update episodes, and manage private feed subscribers.

What you can do
  • List and read podcasts, with settings, metadata and accepted iTunes categories
  • List and read episodes of a podcast, including notes and audio details
  • Create and update episodes, uploading audio from a public https URL
  • Update podcast metadata such as title, description and feed settings
  • List, look up and add private subscribers, and revoke or reactivate their subscriptions
  • Check monthly tool-call usage and manage the paid plan
When to use it
Useful when you publish podcasts on Castos and want an assistant to review your catalog, draft or schedule episodes from an audio link, or handle private-feed subscriber lists without opening the Castos dashboard.
Requirements
Remote MCP endpoint reached over streamable HTTP; no local install. Sign-in is via OAuth, and the login page asks for your Castos API token (found in Castos account settings), which the server validates and stores per user. No API key or Authorization header goes in the client config. A free plan allows 50 tool calls per month.
Before you install
Several tools write to your live Castos account: creating an episode can publish to the live feed immediately, so check the publish date, and updating an episode can replace its audio. Revoking a private subscriber removes that person's access to the private feed. Episode audio is fetched from a public https URL you supply, up to 40 MB. Your Castos API token is stored by the third-party host. Paid plans are billed through Stripe checkout links, and cancellation gives no refund for the current…

Installation

In SourceWeft

  1. Open Castos MCP by usefulapi in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.usefulapi%2Fcastos/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "castos-by-usefulapi": {
      "type": "http",
      "url": "https://castos.usefulapi.io/mcp"
    }
  }
}

README

Castos MCP by usefulapi

Use your Castos account from Claude, Cursor, or any MCP client. Read podcasts and episodes, create and update episodes, and manage private subscribers. Hosted, no local install: connect with your own credentials.

Live endpoint: https://castos.usefulapi.io/mcp · Homepage: https://usefulapi.io

Connect

  • Claude (claude.ai, Desktop): open Customize → Connectors, click + Add → Add custom connector, and paste https://castos.usefulapi.io/mcp.
  • Claude Code: claude mcp add --transport http castos https://castos.usefulapi.io/mcp, then run /mcp to log in.
  • VS Code: Add to VS Code.
  • Cursor and other clients: add the URL as a remote MCP server:
json
{  "mcpServers": {    "castos": {      "url": "https://castos.usefulapi.io/mcp"    }  }}

Add only the URL. Do not add an Authorization header or an API key to the client config: the server signs you in with OAuth, and the login page asks for your Castos credentials.

Step-by-step setup, where to find your credentials, and FAQ: https://usefulapi.io/castos/

On first connect you provide your Castos API token (account avatar → Account Settings → Publish Settings). The server validates it and stores it per user. No keys go in config files.

Tools

ToolTypeWhat it does
castos_list_podcastsreadList podcasts
castos_get_podcastreadGet a podcast
castos_update_podcastwriteUpdate a podcast
castos_list_episodesreadList episodes
castos_get_episodereadGet an episode
castos_create_episodewriteCreate an episode
castos_update_episodewriteUpdate an episode
castos_list_private_subscribersreadList private subscribers
castos_get_private_subscriberreadGet a private subscriber
castos_get_private_subscriber_by_emailreadFind a private subscriber by email
castos_create_private_subscriberwriteAdd a private subscriber
castos_reactivate_private_subscriberwriteReactivate a private subscriber
castos_revoke_private_subscriberwriteRevoke a private subscription
castos_list_categoriesreadList podcast categories
castos_usage_statusmetaUsage status (free-tier meter)
castos_request_featuremetaRequest a missing feature
castos_upgrademetaUpgrade to Pro or Pro+
castos_cancel_subscriptionmetaCancel the Pro subscription

read tools are read-only; write tools mutate data (clients should confirm them); meta tools report usage, manage your subscription or send a feature request.

Pricing

PlanPriceLimit
Free$050 tool calls / month
Pro (per user)$9/mo or $90/yr (2 months free)Unlimited*

*Pro has a fair use limit of 10,000 tool calls a month on this server. For more, write to [email protected].

Pro covers this server only. Subscribe with castos_upgrade (it returns a Stripe Checkout link). Cancel any time with castos_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running castos_upgrade before then undoes the cancel. Or write to [email protected].

License

MIT — see LICENSE. Documentation only; the server is hosted.

Source: servers/castos/README.md at commit 2450437

Tools

14

castos_list_podcasts

List podcasts

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

Takes no parameters.

castos_get_podcast

Get a podcast

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

Parameterspodcast_idrequired

castos_update_podcast

Update a 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}.

Parametersituneswebsiteexplicitkeywordslanguagecopyrightshow_typepodcast_idrequiredauthor_nameowner_emailpodcast_ownerpodcast_title+9 more

castos_list_episodes

List episodes

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

Parameterspodcast_idrequired

castos_get_episode

Get an 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}.

Parametersepisode_idrequiredpodcast_idrequired

castos_create_episode

Create an 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).

Parameterskeywordspost_datepodcast_idrequiredpost_titlerequiredepisode_typepost_contentrequiredseries_numberepisode_numberepisode_file_urlrequired

castos_update_episode

Update an 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}.

Parameterskeywordspost_dateepisode_idrequiredpodcast_idrequiredpost_titleepisode_typepost_contentseries_numberepisode_numberupdated_episode_file

castos_list_private_subscribers

List private subscribers

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

Parameterspageper_pagepodcast_idrequired

castos_get_private_subscriber

Get a private subscriber

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

Parameterssubscriber_idrequired

castos_get_private_subscriber_by_email

Find a 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}.

Parametersemail_addressrequired

castos_create_private_subscriber

Add a 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.

Parametersnameemailrequiredpodcast_idrequired

castos_reactivate_private_subscriber

Reactivate a 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}.

Parameterssubscriber_idrequired

castos_revoke_private_subscriber

Revoke a private subscription

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}.

Parameterssubscription_idrequired

castos_list_categories

List podcast categories

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

Takes no parameters.

Version history

1
  1. v1.0.1LatestNov 7, 2026

Score

100% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts

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