Automate Lemmy with Claude Cowork

Post to Lemmy communities, share links across the fediverse, and cross-post to multiple communities — all from the command line or through your AI agent.

Setup Guide

Please make sure there is always a human in the loop.

Post to Lemmy in Seconds

Terminal

# Install the skill
npx skills add gitroomhq/postiz-agent

# Set your API key
export POSTIZ_API_KEY=your_api_key

# Find your Lemmy integration
postiz integrations:list

# Post to a Lemmy community
postiz posts:create \
  -c "Check out this interesting article about open source!" \
  -s "2025-01-15T10:00:00Z" \
  --settings '{"subreddit":[{"value":{"subreddit":"technology","id":"comm-id","title":"Check this out"}}]}' \
  -i "your-lemmy-integration-id"

Lemmy-Specific Features

🏘️

Community Posting

Post directly to any Lemmy community. Target specific communities by name and ID for precise content distribution.

🔗

Link Posts

Share URLs alongside your post content. Perfect for sharing articles, resources, and external content with your communities.

🌐

Federated Network

Reach users across the entire fediverse. Your posts on one Lemmy instance are visible to federated instances automatically.

🔀

Cross-Community Posting

Post to multiple Lemmy communities in a single request. Share content across related communities to maximize reach.

📝

Custom Titles

Set unique titles for each community post. Tailor your headlines to match the culture and expectations of each community.

📅

Scheduled Posting

Schedule posts with precise timestamps. Plan your community engagement ahead of time and post at peak activity hours.

How It Works

Find Your Lemmy Integration

List your connected accounts and grab your Lemmy integration ID. You can also fetch available settings to see what options are supported.

Discovery

# List all integrations
postiz integrations:list

# Filter for Lemmy
postiz integrations:list | jq \
  '.[] | select(.identifier=="lemmy")'

# Get Lemmy settings schema
postiz integrations:settings <lemmy-id>

Choose Your Communities

Identify the Lemmy communities you want to post to. Each community requires a name, ID, and a post title. You can optionally include a URL for link posts.

Configuration

# Example community configuration
# subreddit = community name
# id = community ID from your instance
# title = post title (required, min 2 chars)
# url = optional link URL

echo '{
  "subreddit": [
    {
      "value": {
        "subreddit": "technology",
        "id": "comm-123",
        "title": "Great article on AI",
        "url": "https://example.com/article"
      }
    }
  ]
}'

Create Your Post

Schedule a Lemmy post with your content, target communities, and optional link URL. Posts can target one or multiple communities at once.

Post Creation

postiz posts:create \
  -c "Thoughts on the future of open source" \
  -s "2025-03-01T09:00:00Z" \
  --settings '{
    "subreddit": [
      {
        "value": {
          "subreddit": "technology",
          "id": "comm-123",
          "title": "The Future of Open Source",
          "url": "https://example.com/article"
        }
      }
    ]
  }' \
  -i "lemmy-id"

Lemmy Settings Reference

Every Lemmy post accepts these platform-specific settings via the --settings flag.

Field	Type	Required	Description
`__type`	string	Yes	Must be "lemmy"
`subreddit`	array	Yes	Array of community objects: [{value: {subreddit, id, title, url?}}]
`subreddit[].value.subreddit`	string	Yes	Community name (min 2 characters)
`subreddit[].value.id`	string	Yes	Community ID on the Lemmy instance
`subreddit[].value.title`	string	Yes	Post title (min 2 characters)
`subreddit[].value.url`	string	No	Optional URL for link posts

Common Configurations

Copy-paste these settings for common Lemmy posting scenarios.

Simple Text Post to One Community

settings.json

{
  "subreddit": [
    {
      "value": {
        "subreddit": "technology",
        "id": "comm-123",
        "title": "Interesting discussion on AI agents"
      }
    }
  ]
}

Link Post with URL

settings.json

{
  "subreddit": [
    {
      "value": {
        "subreddit": "opensource",
        "id": "comm-456",
        "title": "New open-source social media tool",
        "url": "https://github.com/gitroomhq/postiz-app"
      }
    }
  ]
}

Cross-Post to Multiple Communities

settings.json

{
  "subreddit": [
    {
      "value": {
        "subreddit": "technology",
        "id": "comm-123",
        "title": "AI-powered social media automation"
      }
    },
    {
      "value": {
        "subreddit": "selfhosted",
        "id": "comm-789",
        "title": "Self-host your social media scheduler"
      }
    },
    {
      "value": {
        "subreddit": "opensource",
        "id": "comm-456",
        "title": "Open-source alternative to Buffer"
      }
    }
  ]
}

What is Claude Cowork?

Claude Cowork is Anthropic's agentic AI tool for knowledge workers. It runs on your desktop, connects to local files and apps like Google Drive, Gmail, and DocuSign, and completes multi-step tasks autonomously.

💻

Desktop Native

Claude Cowork runs directly on your desktop, connecting to your local files and apps. No browser or cloud setup needed to manage your social media workflow.

🔗

App Integrations

Connects to Google Drive, Gmail, DocuSign, and more. Pull content from your existing tools and publish it to social media seamlessly.

🤖

Autonomous Tasks

Claude Cowork completes multi-step tasks on its own. Tell it to draft, schedule, and publish posts — it handles the entire workflow.

How Postiz Works with Claude Cowork

Claude Cowork discovers Postiz through MCP (Model Context Protocol) tool integration. Once configured, it can call Postiz commands directly from your desktop — no terminal needed.

✓Install Postiz Agent and set your POSTIZ_API_KEY
✓Claude Cowork discovers Postiz through MCP integration
✓All Postiz commands become available as tools
✓Claude Cowork autonomously chains commands for complex workflows
✓Works seamlessly with your existing desktop apps and files

Install Postiz

# Install the Postiz skill
npx skills add gitroomhq/postiz-agent

# Set your API key
export POSTIZ_API_KEY=your_api_key

# Claude Cowork discovers Postiz
# through MCP tool integration
# and can call all commands directly

Lemmy Posting with Claude Cowork

Tell Claude Cowork what to post from your desktop — it connects to Postiz, discovers your integrations, and handles the entire publishing workflow without you touching the terminal.

🦀

From Any Chat App

Tell Claude Cowork what to post from you...

Send a message to Claude Cowork from your favorite chat app. It runs as a persistent daemon on your machine, so it picks up your message, discovers your Lemmy account via Postiz, composes the post, and publishes it to your chosen communities.

Claude Cowork

You: Post to Lemmy about our new
  feature launch, schedule for tomorrow
  at 9am

Claude Cowork: I'll handle that for you.
  1. Found your Lemmy integration
  2. Composing your post
  3. Scheduling for tomorrow at 9:00 AM

  Done! Your post is scheduled.
  Post ID: abc-123

🦀

Scheduled & Proactive

Claude Cowork can be asked to perfo...

Claude Cowork supports cron-based heartbeat tasks. Set up a recurring job that checks for new content and cross-posts it to your Lemmy communities automatically — no manual trigger needed.

Claude Cowork Task

Tell Claude Cowork:

"Every weekday morning, check my
~/content/drafts folder for new posts
and schedule them to Lemmy
for noon today. Move published drafts
to ~/content/published."

Claude Cowork will autonomously:
  1. Monitor your drafts folder
  2. Read and format each post
  3. Schedule via Postiz
  4. Move files when done

Why Claude Cowork + Postiz for Lemmy

Claude Cowork makes Postiz a natural fit for your Lemmy workflow. The agent discovers all available commands and autonomously chains them together.

✓Desktop-native — no terminal or CLI knowledge needed
✓Connects to your local files to pull content for Lemmy posts
✓Multi-step autonomy — handles discovery, composition, and scheduling
✓Works with Google Drive, Gmail, and other desktop apps
✓Cross-post to Lemmy + other platforms in a single request
✓Powered by Claude — Anthropic's most capable AI model

SKILL.md (auto-discovered)

---
name: postiz
description: Social media automation
  CLI for scheduling posts across
  30+ platforms including Lemmy
metadata:
  claude-cowork:
    requirements:
      env:
        - POSTIZ_API_KEY
      binaries:
        - postiz
---

# Available Commands
- postiz integrations:list
- postiz integrations:settings <id>
- postiz posts:create
- postiz upload <file>
- postiz analytics:platform <id>

# Lemmy Settings
subreddit (array of communities),
each with: subreddit, id, title, url

Also Works with OpenClaw

Postiz Agent works as a CLI tool with any AI agent that can execute shell commands — including OpenClaw, the open-source personal AI agent.

🦀

OpenClaw

Open-source AI agent

Claude reads the SKILL.md file to learn all available Postiz commands, then autonomously discovers your Lemmy integration, composes your post with the right community settings, and schedules it.

OpenClaw

> Post an article about our new release
  to the technology and opensource
  communities on Lemmy

Claude will automatically run:
  postiz integrations:list
  postiz posts:create \
    -c "We just launched v2.0!" \
    -s "2025-03-02T09:00:00Z" \
    --settings '{"subreddit":[
      {"value":{"subreddit":"technology",
        "id":"comm-123",
        "title":"New Release v2.0",
        "url":"https://blog.example.com"}},
      {"value":{"subreddit":"opensource",
        "id":"comm-456",
        "title":"Open Source Release v2.0",
        "url":"https://blog.example.com"}}
    ]}' \
    -i "lemmy-id"

Lemmy + Other Platforms

Schedule the same content to Lemmy and other platforms in a single command. Each platform gets its own settings.

Terminal

# Post to Lemmy and Reddit simultaneously
postiz posts:create \
  -c "Check out our new open-source project! #opensource" \
  -s "2025-03-01T09:00:00Z" \
  --settings '{
    "subreddit": [
      {
        "value": {
          "subreddit": "technology",
          "id": "comm-123",
          "title": "New open-source social media tool"
        }
      }
    ]
  }' \
  -i "lemmy-id,reddit-id"

# Batch schedule a week of Lemmy content
for day in 1 2 3 4 5; do
  postiz posts:create \
    -c "Day $day community highlight! #fediverse" \
    -s "2025-03-0${day}T10:00:00Z" \
    --settings '{"subreddit":[{"value":{"subreddit":"technology","id":"comm-123","title":"Day '"$day"' Highlight"}}]}' \
    -i "lemmy-id"
done

Start posting to Lemmy

Install Postiz Agent and automate your Lemmy community engagement with AI-powered scheduling and publishing.

Get Started

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