# Sydium (ChatGPT App)

> Schedule posts in your voice

- Type: app
- Publisher: Parhelion (official)
- Categories: Productivity
- Website: https://chatgpt.com/plugins/plugin_asdk_app_6a6878cb30988191a59fb5abfdb286a8
- Open in ChatGPT: https://chatgpt.com/plugins/plugin_asdk_app_6a6878cb30988191a59fb5abfdb286a8
- Version: 1.0.1
- Listed: 2026-10-04

## About

Sydium for ChatGPT connects your existing Sydium workspace - it requires an active plan or trial, and connecting doesn't start one (plans are managed at sydium.com). Once connected, ChatGPT can draft captions the way you actually write (learned from what you have already published), schedule or publish to up to ten platforms (Instagram, TikTok, YouTube, LinkedIn, X, Facebook, Pinterest, Bluesky, Threads, Mastodon), check how posts performed, pull today's content idea, and manage the upcoming queue - edit, reschedule, or cancel anything still scheduled. Agencies can act for individual clients with the same team-scoped permissions as the Sydium app. Publishing actions are explicit: ChatGPT confirms before anything lands on a public feed.

## How to use

1. **Add it in ChatGPT** Open Sydium in ChatGPT's Plugin directory (button above), select + to add it and sign in if asked.

2. **Use it in a chat** Type @ in the composer and pick Sydium, or start your message with its name. ChatGPT may also suggest it when it fits what you ask.

## Example prompts

- "What's on my posting schedule this week?"
- "Draft an Instagram caption about our new opening hours, in my brand voice."
- "How did my accounts perform over the last 30 days?"

## Related

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- [Evernote](https://chatgptplugins.directory/apps/evernote.md): Search, edit and organize your Evernote notes and tasks
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- [Trello](https://chatgptplugins.directory/apps/trello.md): Create boards and manage Trello cards in natural language
- [Descript](https://chatgptplugins.directory/apps/descript.md): Edit video and podcasts by describing what you want

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Source: https://chatgptplugins.directory/apps/sydium · Index: https://chatgptplugins.directory/llms.txt · Independent and community-run. Not affiliated with or endorsed by OpenAI. ChatGPT is a trademark of OpenAI.