{"slug": "auto-post-to-9-platforms-with-claude-code-and-zernio", "title": "Auto-Post to 9 Platforms with Claude Code and Zernio", "summary": "To build an AI agent using Claude Code and Zernio that automatically analyzes video or image content, generates platform-optimized captions and hashtags, and publishes to nine social media platforms simultaneously. The setup requires a Zernio account, Claude Code installation, and approximately 30 minutes to configure, after which each post takes only five minutes. Zernio handles all cross-platform API integrations, OAuth flows, and rate-limit management, allowing Claude to communicate with a single API while Zernio manages the multi-platform publishing process.", "body_md": "What you'll build: An agent that analyzes video or images and generates platform-optimized captions, hashtags, and titles—then publishes to 9 social platforms at once.\nManual posting kills momentum. You format content for Instagram, then rewrite everything for TikTok. Again for LinkedIn. Again for X. A single video turns into a 2-hour job.\nWith this setup, one prompt becomes nine scheduled posts - captions, hashtags, and format conversions all handled automatically.\nA Zernio account (free tier: 2 platforms)\nClaude Code installed\n30 minutes to set up; 5 minutes per post after\nZernio is the layer that handles the actual platform integrations. Without it, you'd need to build separate OAuth flows, API integrations, media handling, and rate-limit management for each platform (months of work before Claude could publish a post).\nWith Zernio, that's already done. Claude talks to one API; Zernio handles the cross-platform part.\nLog in at zernio.com\nGo to your profile and click Connect platform for each account you use (Instagram, TikTok, X, YouTube, LinkedIn, Threads, Pinterest, etc.)\nAuthorize Zernio for each\nVerify each shows in your dashboard\nThe skill includes platform-specific guidelines for 9 platforms -hashtag rules, character limits, format specs, tone cues. You're not training Claude from scratch.\nDownload the skill from the Zernio library GitHub repo\nExtract the zip\nYou'll get:\nzernio-library-skills/\n├── .claude/\n│ └── skills/\n│ ├── zernio-publish/ ← the publishing skill\n│ │ ├── SKILL.md\n│ │ ├── reference/ deep API + per-platform docs\n│ │ └── templates/manifest.json\n│ └── skill-creator/ ← Anthropic's official skill-creator\n│ bundled for when you add more skills\n├── .env ← ZERNIO_API_KEY (placeholder until you fill it)\n├── CLAUDE.md ← architectural map of the repo\n├── README.md\n├── LICENSE ← MIT\n└── .gitignore\nKeep the folder structure intact. Claude needs reference/platforms/\nto look up rules when writing captions.\nOpen VS Code or use Claude Code / Cowork directly\nCreate a new folder for this project or use an existing one\nExtract the zip and copy the entire folder to your project root\nYour file tree should show .claude/zernio-publishing/\nat the top level\nIn Cowork: Go to Skills → + Create skill → Upload skill and select the folder.\nClaude needs a Zernio API key to publish.\nLog in to Zernio\nGo to API keys (settings)\nClick Create key, name it (e.g., \"claude-publishing\")\nCopy it\nCreate a .env\nfile in your project root:ZERNIO_API_KEY=your-key-here\nClaude Code reads this automatically—never paste keys into prompts.\nStart with one video and 2–3 platforms to confirm the skill works.\nGive Claude this:\nI have a short-form video at [path/to/video.mp4]. Can you analyze it, create optimized posts for Instagram, TikTok, and LinkedIn, and schedule them using Zernio?\nClaude will:\nLoad the skill and platform guidelines\nAnalyze your video\nGenerate captions, hashtags, titles, and first comments\nCall Zernio to stage the posts\nShow you a preview before publishing\nClaude shows all posts before publishing. You control what goes live.\nYou'll see something like:\nRequest changes if needed. Say \"Approve\" when it looks good.\nNote: First comments are easy to miss if you skim the preview. Read the full output before approving—Instagram, TikTok, and LinkedIn generate engagement hooks you might not see at first glance.\nOnce you're confident with a few, the system handles format conversion and batching automatically.\nYou can:\nPost to 9 platforms at once: Video or carousel becomes optimized for each platform's native format\nConvert formats: Carousels become videos for platforms that don't support multi-image\nBatch multiple assets: Claude processes everything and schedules it all\nExample:\nI have a carousel at [Google Drive link] and a 30-second clip at [path]. Convert the carousel to video and post both to Instagram, TikTok, X, YouTube, LinkedIn, and Threads. Optimize each for that platform. Schedule for tomorrow at 9 AM.\nYou own a system that turns one prompt into nine scheduled posts—all optimized and formatted. A video that took 2 hours to post manually now takes 5 minutes to set up and approve.\nThe time saved compounds. This week: 2 hours back. Next month: 20+ hours back. That's time spent creating instead of grinding.\nCheck posts in Zernio or directly on each platform. Track analytics and iterate. The system learns as you refine your voice.\nQuestions or running into issues? Drop them in the comments.", "url": "https://wpnews.pro/news/auto-post-to-9-platforms-with-claude-code-and-zernio", "canonical_source": "https://dev.to/darya_nazarava_0c4fcd1ef2/auto-post-to-9-platforms-with-claude-code-and-zernio-1e9h", "published_at": "2026-05-20 10:13:40+00:00", "updated_at": "2026-05-20 10:33:41.991022+00:00", "lang": "en", "topics": ["developer-tools", "products", "startups"], "entities": ["Claude Code", "Zernio", "Instagram", "TikTok", "LinkedIn", "X", "YouTube", "Threads"], "alternates": {"html": "https://wpnews.pro/news/auto-post-to-9-platforms-with-claude-code-and-zernio", "markdown": "https://wpnews.pro/news/auto-post-to-9-platforms-with-claude-code-and-zernio.md", "text": "https://wpnews.pro/news/auto-post-to-9-platforms-with-claude-code-and-zernio.txt", "jsonld": "https://wpnews.pro/news/auto-post-to-9-platforms-with-claude-code-and-zernio.jsonld"}}