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Podcast to X (Twitter) pipeline with OpenAI Whisper, GPT-4o & Slack approval

Shun NakayamaShun Nakayama
171 views
2/3/2026
AIVision AIGoogle CloudImage AnalysisGemini
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Turn your favorite podcast episodes into engaging social media content automatically. This workflow fetches new episodes from an RSS feed, transcribes the audio using OpenAI Whisper, generates a concise summary using GPT-4o, and drafts a tweet. It then sends the draft to Slack for your review before posting it to X (Twitter).

Who is this for

Content creators, social media managers, and podcast enthusiasts who want to share insights without manually listening to and typing out every episode.

Key Features

  • Large File Support: Includes a custom logic to download audio in chunks, ensuring stability even with long episodes (preventing timeouts).
  • Human-in-the-Loop: Nothing gets posted without your approval. You can review the AI-generated draft in Slack before it goes live.
  • High-Quality AI: Uses OpenAI's Whisper for accurate transcription and GPT-4o for intelligent summarization.

How it works

  1. Monitor: Checks the Podcast RSS feed daily for new episodes.
  2. Process: Downloads the audio (handling large files via chunking) and transcribes it.
  3. Draft: AI summarizes the transcript into bullet points and formats it for X (Twitter).
  4. Approve: Sends the draft to a Slack channel.
  5. Publish: Once approved by you, it posts the tweet to your X account.

Requirements

  • OpenAI API Key
  • Slack Account & App (Bot Token)
  • X (Twitter) Developer Account (OAuth2)

Setup instructions

  1. RSS Feed: The template defaults to "TED Talks Daily" for demonstration. Open the [Step 1] RSS node and replace the URL with your target podcast.
  2. Connect Credentials: Set up your credentials for OpenAI, Slack, and X (Twitter) in the respective nodes.
  3. Slack Channel: In the [Step 12] Slack node, select the Channel ID where you want to receive the approval request.

n8n Podcast to X (Twitter) Pipeline with OpenAI Whisper, GPT-4o & Slack Approval

This n8n workflow automates the process of transcribing new podcast episodes, generating a summary and a tweet, and then publishing the tweet to X (formerly Twitter) after a Slack approval.

What it does

This workflow streamlines your content promotion by:

  1. Monitors an RSS Feed: It periodically checks a specified RSS feed for new podcast episodes.
  2. Fetches Podcast Audio: When a new episode is found, it downloads the audio file.
  3. Transcribes Audio with OpenAI Whisper: The audio file is sent to OpenAI's Whisper API for transcription.
  4. Generates Summary and Tweet with OpenAI GPT-4o: The transcription is then passed to OpenAI's GPT-4o model to create a concise summary and a compelling tweet.
  5. Seeks Slack Approval: Before publishing, the generated tweet and summary are sent to a designated Slack channel for human review and approval.
  6. Publishes to X (Twitter): Upon approval in Slack, the tweet is automatically posted to your X (Twitter) account.

Prerequisites/Requirements

To use this workflow, you will need:

  • n8n Instance: A running n8n instance.
  • OpenAI API Key: An API key for OpenAI, with access to Whisper and GPT-4o models.
  • Slack Account: A Slack workspace and a channel where approval messages will be sent.
  • X (Twitter) Account: An X (Twitter) developer account with API access to post tweets.
  • Podcast RSS Feed URL: The URL of the RSS feed for your podcast.

Setup/Usage

  1. Import the Workflow:
    • Copy the provided JSON code for the workflow.
    • In your n8n instance, go to "Workflows" and click "New".
    • Click the "Import from JSON" button and paste the workflow JSON.
  2. Configure Credentials:
    • OpenAI Node: Configure your OpenAI API Key credential.
    • Slack Node: Configure your Slack API Token credential.
    • X (Twitter) Node: Configure your X (Twitter) API credentials (Consumer Key, Consumer Secret, Access Token, Access Token Secret).
  3. Configure Nodes:
    • RSS Read Node (ID: 37): Enter the URL of your podcast's RSS feed.
    • HTTP Request Node (ID: 19): This node is responsible for downloading the audio file. Ensure its configuration correctly extracts the audio URL from the RSS feed item.
    • OpenAI Node (ID: 1250):
      • Set the "Operation" to "Transcribe Audio" for the first OpenAI node (Whisper).
      • Set the "Operation" to "Chat" for the second OpenAI node (GPT-4o) and configure the prompt to generate a summary and tweet from the transcription.
    • Slack Node (ID: 40):
      • Specify the Slack channel where approval messages should be sent.
      • Customize the message template to include the generated summary and tweet.
    • X (Twitter) Node (ID: 325): Configure the tweet content to use the approved tweet text from Slack.
    • Schedule Trigger Node (ID: 839): Adjust the schedule to your desired frequency for checking the RSS feed (e.g., every hour, daily).
  4. Activate the Workflow: Once all credentials and nodes are configured, activate the workflow.

The workflow will now automatically monitor your podcast feed, process new episodes, and await your approval in Slack before posting to X.

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