Transistor MCP Server

An MCP server for the Transistor.fm API. Manage podcasts, episodes, analytics, transcripts, and webhooks from your AI agent.

This MCP server provides tools to interact with the Transistor.fm API, allowing you to manage podcasts, episodes, and view analytics. The data shown in the demo above is sample data, not real account values.

Fork notice: This is a maintained fork of gxjansen/Transistor-MCP by Guido X Jansen, who built the original server. This fork adds full API parity (all documented params, response trimming, search), the get_download_summary and compare_episodes tools, ISO date handling, and transcript support. The MIT license and original copyright are preserved in LICENSE.

About

Built and maintained by Conor Bronsdon for the Chain of Thought podcast production workflow, where it handles episode creation, transcript uploads, and analytics pulls. Conor hosts Chain of Thought, a show about AI infrastructure and how practitioners actually build with it. More tools for creators live in ai-tools-for-creators. Find Conor on X at @ConorBronsdon.

Sibling MCP servers:

• substack-mcp: read posts and manage Substack drafts
• podcastindex-mcp: search the Podcast Index and track guest appearances

Configuration

Add the server to your MCP settings configuration file with your Transistor API key:

{
  "mcpServers": {
    "transistor": {
      "command": "npx",
      "args": ["-y", "transistor-mcp"],
      "env": {
        "TRANSISTOR_API_KEY": "your-api-key-here"
      }
    }
  }
}

Or run from a local clone (after npm install && npm run build):

{
  "mcpServers": {
    "transistor": {
      "command": "node",
      "args": ["path/to/Transistor-MCP/build/index.js"],
      "env": {
        "TRANSISTOR_API_KEY": "your-api-key-here"
      }
    }
  }
}

Available Tools

get_authenticated_user

Get details of the authenticated user account.

{
  // No parameters needed
}

authorize_upload

Get a pre-signed URL for uploading an audio file. Use this before creating an episode with a local audio file.

{
  "filename": string  // Required: Name of the audio file to upload
}

Response includes:

• upload_url: Pre-signed S3 URL for uploading the file
• content_type: Content type to use when uploading (e.g., "audio/mpeg")
• expires_in: Time in seconds until the upload URL expires
• audio_url: Final URL to use when creating the episode

list_shows

List all shows in your Transistor.fm account, ordered by updated date (newest first). Returns a paginated list with 10 items per page.

{
  "page": number,     // Optional, defaults to 0 (first page)
  "per": number,      // Optional, defaults to 10 items per page
  "private": boolean, // Optional: filter for private shows
  "query": string     // Optional: search query
}

Note: All parameters are optional. Calling this endpoint without parameters will return the first page of shows.

list_episodes

List episodes for a specific show.

{
  "show_id": string,  // Required
  "page": number,     // Optional, defaults to 0
  "per": number,      // Optional, defaults to 10
  "query": string,    // Optional: search query
  "status": string,   // Optional: "published", "draft", or "scheduled"
  "order": string     // Optional: "desc" (newest first) or "asc" (oldest first), defaults to "desc"
}

get_episode

Get detailed information about a specific episode.

{
  "episode_id": string,           // Required
  "include": string[],           // Optional: array of related resources to include
  "fields": {                    // Optional: sparse fieldsets
    "episode": string[],         // Fields to include for episode
    "show": string[]            // Fields to include for show
  }
}

get_analytics

Get analytics for a show or specific episode. Defaults to the last 14 days if no dates are provided.

{
  "show_id": string,            // Required
  "episode_id": string,         // Optional: include for episode-specific analytics
  "start_date": string,         // Optional: format "dd-mm-yyyy", required if end_date is provided
  "end_date": string           // Optional: format "dd-mm-yyyy", required if start_date is provided
}

create_episode

Create a new episode.

{
  "show_id": string,               // Required
  "title": string,                 // Required
  "audio_url": string,             // Required
  "summary": string,               // Optional
  "description": string,           // Optional: may contain HTML
  "transcript_text": string,       // Optional: full episode transcript
  "author": string,               // Optional
  "explicit": boolean,            // Optional
  "image_url": string,            // Optional: episode artwork
  "keywords": string,             // Optional: comma-separated list
  "number": number,               // Optional: episode number
  "season_number": number,        // Optional
  "type": string,                // Optional: "full", "trailer", or "bonus"
  "alternate_url": string,       // Optional: override share_url
  "video_url": string,           // Optional: YouTube URL
  "email_notifications": boolean, // Optional: override show setting
  "increment_number": boolean     // Optional: auto-set next episode number
}

update_episode

Update an existing episode.

{
  "episode_id": string,           // Required
  "title": string,               // Optional
  "summary": string,             // Optional
  "description": string,         // Optional: may contain HTML
  "transcript_text": string,     // Optional: full episode transcript
  "author": string,             // Optional
  "explicit": boolean,          // Optional
  "image_url": string,          // Optional: episode artwork
  "keywords": string,           // Optional: comma-separated list
  "number": number,             // Optional: episode number
  "season_number": number,      // Optional
  "type": string,              // Optional: "full", "trailer", or "bonus"
  "alternate_url": string,     // Optional: override share_url
  "video_url": string,         // Optional: YouTube URL
  "email_notifications": boolean // Optional: override show setting
}

get_all_episode_analytics

Get analytics for all episodes of a show. Defaults to the last 7 days if no dates are provided.

{
  "show_id": string,            // Required
  "start_date": string,         // Optional: format "dd-mm-yyyy", required if end_date is provided
  "end_date": string           // Optional: format "dd-mm-yyyy", required if start_date is provided
}

list_webhooks

List all webhooks for a show.

{
  "show_id": string            // Required
}

subscribe_webhook

Subscribe to a webhook for a show.

{
  "event_name": string,        // Required: e.g., "episode_created"
  "show_id": string,          // Required
  "url": string              // Required: URL to receive webhook events
}

unsubscribe_webhook

Unsubscribe from a webhook.

{
  "webhook_id": string        // Required
}

Important Notes

• API requests are rate-limited to 10 requests per 10 seconds (as prescribed by the (https://developers.transistor.fm/#:~:text=API%20requests%20are%20rate%2Dlimited,to%20use%20the%20API%20again.)[Transistor API reference])
• Dates must be in "dd-mm-yyyy" format
• Page numbers start at 0
• All endpoints support:
  • Sparse fieldsets: Specify which fields to return using fields[resource_type][]
  • Including related resources: Use include[] to fetch related resources in a single request
• Include arrays use the format ["resource_name"]
• Fields objects specify which fields to return for each resource type
• All tools return data in JSONAPI format with proper relationships and metadata

Example Usage

List shows:

// List first page of shows (default behavior)
const result = await use_mcp_tool({
  server_name: "transistor",
  tool_name: "list_shows",
  arguments: {}
});

// List shows with pagination and filtering
const resultWithParams = await use_mcp_tool({
  server_name: "transistor",
  tool_name: "list_shows",
  arguments: {
    page: 1,
    per: 20,
    private: true,
    query: "podcast"
  }
});

Get episode details:

const result = await use_mcp_tool({
  server_name: "transistor",
  tool_name: "get_episode",
  arguments: {
    episode_id: "123456",
    include: ["show"],
    fields: {
      episode: ["title", "summary", "description"],
      show: ["title"]
    }
  }
});

Get show analytics:

// Get analytics for the last 14 days (default behavior)
const result = await use_mcp_tool({
  server_name: "transistor",
  tool_name: "get_analytics",
  arguments: {
    show_id: "123456"
  }
});

// Get analytics for a specific date range
const resultWithDates = await use_mcp_tool({
  server_name: "transistor",
  tool_name: "get_analytics",
  arguments: {
    show_id: "123456",
    start_date: "01-01-2024",
    end_date: "31-01-2024"
  }
});

// Get analytics for a specific episode
const episodeAnalytics = await use_mcp_tool({
  server_name: "transistor",
  tool_name: "get_analytics",
  arguments: {
    show_id: "123456",
    episode_id: "789012",
    start_date: "01-01-2024",
    end_date: "31-01-2024"
  }
});

Update episode:

const result = await use_mcp_tool({
  server_name: "transistor",
  tool_name: "update_episode",
  arguments: {
    episode_id: "123456",
    title: "Updated Episode Title",
    summary: "New episode summary",
    description: "New detailed description",
    season_number: 2,
    episode_number: 5
  }
});

Get all episode analytics:

// Get analytics for all episodes for the last 7 days (default behavior)
const result = await use_mcp_tool({
  server_name: "transistor",
  tool_name: "get_all_episode_analytics",
  arguments: {
    show_id: "123456"
  }
});

// Get analytics for all episodes for a specific date range
const resultWithDates = await use_mcp_tool({
  server_name: "transistor",
  tool_name: "get_all_episode_analytics",
  arguments: {
    show_id: "123456",
    start_date: "01-01-2024",
    end_date: "31-01-2024"
  }
});

Manage webhooks:

// List webhooks
const webhooks = await use_mcp_tool({
  server_name: "transistor",
  tool_name: "list_webhooks",
  arguments: {
    show_id: "123456"
  }
});

// Subscribe to webhook
const subscription = await use_mcp_tool({
  server_name: "transistor",
  tool_name: "subscribe_webhook",
  arguments: {
    event_name: "episode_created",
    show_id: "123456",
    url: "https://your-webhook-endpoint.com/hook"
  }
});

// Unsubscribe from webhook
const unsubscribe = await use_mcp_tool({
  server_name: "transistor",
  tool_name: "unsubscribe_webhook",
  arguments: {
    webhook_id: "webhook123"
  }
});

Get authenticated user:

const result = await use_mcp_tool({
  server_name: "transistor",
  tool_name: "get_authenticated_user",
  arguments: {}
});

Authorize audio file upload:

// First, get a pre-signed upload URL
const auth = await use_mcp_tool({
  server_name: "transistor",
  tool_name: "authorize_upload",
  arguments: {
    filename: "my-episode.mp3"
  }
});

// Then use the returned upload_url to upload your file via PUT request
// Finally, use the returned audio_url when creating your episode:
const episode = await use_mcp_tool({
  server_name: "transistor",
  tool_name: "create_episode",
  arguments: {
    show_id: "123456",
    title: "My New Episode",
    audio_url: auth.data.attributes.audio_url
  }
});

publish_episode

Publish, schedule, or unpublish an episode.

{
  "episode_id": string,          // Required
  "status": string,              // Required: "published", "scheduled", or "draft"
  "published_at": string         // Optional: date/time in the podcast's time zone (required for "scheduled")
}

get_show

Get details of a single show.

{
  "show_id": string              // Required
}

update_show

Update a show's metadata.

{
  "show_id": string,             // Required
  "author": string,              // Optional
  "category": string,            // Optional: primary podcast category
  "copyright": string,           // Optional
  "description": string,         // Optional
  "explicit": boolean,           // Optional
  "image_url": string,           // Optional: show artwork URL
  "keywords": string,            // Optional: comma-separated
  "language": string,            // Optional: e.g. "en"
  "owner_email": string,         // Optional
  "secondary_category": string,  // Optional
  "show_type": string,           // Optional: "episodic" or "serial"
  "title": string,               // Optional
  "time_zone": string,           // Optional
  "website": string              // Optional
}

list_subscribers

List subscribers for a private podcast.

{
  "show_id": string,             // Required
  "page": number,                // Optional
  "per": number,                 // Optional
  "query": string                // Optional: search filter
}

get_subscriber

Get details of a single subscriber.

{
  "subscriber_id": string        // Required
}

create_subscriber

Add a subscriber to a private podcast.

{
  "show_id": string,             // Required
  "email": string,               // Required
  "skip_welcome_email": boolean  // Optional (default false)
}

create_subscribers_batch

Add multiple subscribers at once.

{
  "show_id": string,             // Required
  "emails": string[],            // Required: array of email addresses
  "skip_welcome_email": boolean  // Optional (default false)
}

update_subscriber

Update a subscriber's email address.

{
  "subscriber_id": string,       // Required
  "email": string                // Required: new email address
}

delete_subscriber

Delete a subscriber by ID or by show + email.

{
  "subscriber_id": string,       // Optional: delete by subscriber ID
  "show_id": string,             // Optional: use with email instead of subscriber_id
  "email": string                // Optional: use with show_id instead of subscriber_id
}

Contributing

Issues and pull requests are welcome. If you hit a Transistor API endpoint this server does not cover yet, or you find a bug, open an issue with the tool name and the request you were trying to make. For changes, fork the repo, run npm install && npm run build, and open a PR describing what changed and why.

Disclaimer

All views, opinions, and statements expressed on this account are solely my own and are made in my personal capacity. They do not reflect, and should not be construed as reflecting, the views, positions, or policies of Modular. This account is not affiliated with, authorized by, or endorsed by Modular in any way.

License

MIT. This is a fork of gxjansen/Transistor-MCP; the original copyright by Guido X Jansen is preserved in LICENSE.