Multi Platform Crosspost

Dev Tools

Automatically cross-post blog content to 7+ platforms (LinkedIn, Dev.to, Hashnode, Twitter/X, Reddit, Substack, Pinterest) with tracking, deduplication, and platform-specific formatting. Production-tested pipeline.

Install

openclaw skills install multi-platform-crosspost

Multi-Platform Cross-Post Pipeline 📡

Automatically distribute your blog content across 7+ platforms with a single command. Built for Hugo blogs but adaptable to any static site generator or CMS.

Problem

You write a great article. Then you spend 45 minutes manually posting it to LinkedIn, Dev.to, Hashnode, Reddit, Substack, and Twitter. Every. Single. Time.

This skill eliminates that entirely.

What It Does

Takes a blog post slug as input
Fetches the full article content from your blog admin API
Formats content for each platform (HTML → Markdown, character limits, image handling)
Posts automatically to platforms with API access (Dev.to, Hashnode, LinkedIn)
Emails formatted content for platforms without API (Twitter, Reddit, Substack)
Tracks all cross-posts in Google Sheets (deduplication via slug + source matching)
Handles auth, rate limits, and error recovery

Supported Platforms

Platform	Method	Automation Level
LinkedIn	API (OAuth)	Fully automated
Dev.to	API (token)	Fully automated
Hashnode	API (token)	Fully automated
Pinterest	API	Fully automated
Twitter/X	Email digest	Content formatted, manual post
Reddit	Email digest	Content formatted, manual post
Substack	Email digest	Content formatted, manual post

Architecture

Blog Post Published
    │
    ▼
Webhook Trigger (n8n)
    │
    ├── Validate auth (_secret)
    ├── Fetch post content from blog-admin API
    ├── Parse frontmatter + body
    │
    ├──► IF LinkedIn enabled → Format + Post via API
    ├──► IF Dev.to enabled → Format + Post via API
    ├──► IF Hashnode enabled → Format + Post via API
    ├──► IF Pinterest enabled → Format + Pin via API
    ├──► IF Twitter enabled → Format + Email to owner
    ├──► IF Reddit enabled → Format + Email to owner
    └──► IF Substack enabled → Format + Email to owner
    │
    ▼
Google Sheets Tracker (appendOrUpdate, no duplicates)

Required n8n Credentials

You must create these credentials in your n8n instance before importing:

Credential Type	Used For	Placeholder in JSON
Google Sheets OAuth2	Cross-post tracking and deduplication	`YOUR_GOOGLE_SHEETS_CREDENTIAL_ID`
SMTP (Gmail or custom)	Email digests for manual platforms	`YOUR_SMTP_CREDENTIAL_ID`
LinkedIn OAuth2	Auto-posting to LinkedIn	`YOUR_LINKEDIN_CREDENTIAL_ID`
OpenAI (optional)	AI-powered content formatting	`YOUR_OPENAI_CREDENTIAL_ID`

Configuration Placeholders

Replace these placeholders in the workflow JSON before deploying:

Placeholder	Description
`YOUR_BLOG_ADMIN_API_KEY`	API key for your blog admin panel
`YOUR_CROSSPOST_SECRET`	Webhook authentication secret
`YOUR_TRACKER_SHEET_ID`	Google Sheet ID for cross-post tracking
`YOUR_GOOGLE_SHEETS_CREDENTIAL_ID`	n8n Google Sheets credential ID
`YOUR_SMTP_CREDENTIAL_ID`	n8n SMTP credential ID
`YOUR_LINKEDIN_CREDENTIAL_ID`	n8n LinkedIn OAuth credential ID
`YOUR_LINKEDIN_PERSON_ID`	Your LinkedIn profile URN
`YOUR_OPENAI_CREDENTIAL_ID`	n8n OpenAI credential ID
`YOUR_BLOG_DOMAIN`	Your blog's public URL
`YOUR_FROM_EMAIL`	Sender email for digests
`YOUR_NOTIFICATION_EMAIL`	Where to send cross-post summaries
`YOUR_BLOG_ADMIN_HOST:3000`	Blog admin hostname (Docker or URL)

Quick Start

1. Prerequisites

n8n instance (v2.4+)
Blog with an API endpoint that returns post content
Google Sheets OAuth2 credentials
Platform API keys (at least one)

2. Configure Platforms

Set your API credentials in the workflow's Platform Config node:

{
  "devto_api_key": "your-dev-to-api-key",
  "hashnode_token": "your-hashnode-token",
  "hashnode_publication_id": "your-pub-id",
  "linkedin_credential_id": "your-linkedin-oauth-id"
}

3. Set Up Tracking Sheet

Create a Google Sheet with columns:

slug (text) — Post identifier
source (text) — Blog name (for multi-blog support)
date (date) — Cross-post date
platforms (text) — Comma-separated list of platforms posted to
status (text) — success/partial/failed

4. Trigger

# Via webhook
curl -X POST https://your-n8n.com/webhook/blog-crosspost \
  -H "Content-Type: application/json" \
  -d '{"slug": "my-article", "lang": "en", "platforms": "all", "_secret": "your-secret"}'

# Or via blog admin (auto-triggers on first publish)

Platform-Specific Formatting

Dev.to

Converts HTML to Markdown
Adds canonical URL pointing to original
Maps categories to Dev.to tags (max 4)
Prepends cover image

Hashnode

Markdown with frontmatter
Canonical URL backlink
Tag mapping to Hashnode tags
Publication-scoped posting

Plain text with line breaks (no markdown)
Truncated to 3,000 chars
Includes link to full article
Hashtag injection from tags

Creates pin with featured image
Title from post title
Description from meta description
Link to original article

Deduplication

The tracker uses Google Sheets appendOrUpdate with matching on slug + source. This means:

First post → creates new row
Re-trigger same slug → updates existing row (no duplicates)
Different blogs with same slug → separate rows (source differentiates)

Multi-Blog Support

Run multiple blogs through the same pipeline by setting different source values:

Blog A: source: "my-tech-blog"
Blog B: source: "my-business-blog"

Each gets tracked separately in the same sheet.

Use Cases

Solo blogger — Write once, distribute everywhere
Content agency — Manage cross-posting for multiple client blogs
SEO strategy — Build backlink network across 7 platforms automatically
Newsletter growth — Each platform drives subscribers to your newsletter

Requirements

n8n v2.4+ (self-hosted or cloud)
At least one platform API key
Google Sheets API credentials
Blog admin API or file system access to post content

Tips

Start with Dev.to + LinkedIn (highest ROI, easiest setup)
Add platforms incrementally
Monitor the tracking sheet for failed posts
Canonical URLs prevent duplicate content penalties
Schedule cross-posts 1-2 hours after original publish for better engagement