postiz vs PostSider
postiz is a plugin bundle for AI coding tools published by gitroomhq. Marketplaces we read that list it: 4 (Claude Code: claude-plugins-official, Claude: knowledge-work-plugins, Claude Code: claude-plugins-community, Community GitHub marketplaces). PostSider is an MCP server published by lumizone. Marketplaces we read that list it: 2 (Official MCP Registry, Community GitHub marketplaces). As of our marketplace pass on 2026-10-14. This pair was picked by a reader, not by our comparison rule, so search engines are asked not to index the page.
Where each is published
| Marketplace |  postiz |  PostSider |
|---|---|---|
| Claude Code: claude-plugins-official | Listed Version: 2.0.19 Forks (GitHub): 107 Stars (GitHub): 515 Not marked · First seen |
Not listed |
| Claude: knowledge-work-plugins | Listed Version: 2.0.19 Forks (GitHub): 107 Stars (GitHub): 515 Not marked · First seen |
Not listed |
| Claude Code: claude-plugins-community | Listed Version: 2.0.12 Forks (GitHub): 107 Stars (GitHub): 515 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 1.0.0 Downloads/month (npm): 374 Downloads/week (npm): 27 Forks (GitHub): 0 Stars (GitHub): 11 Not marked · First seen |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
The facts side by side
| Fact | postiz | PostSider |
|---|---|---|
| Marketplaces that list it (differs) | 4 (better) | 2 (worse) |
| Stars (GitHub) (differs) | 515 (better) | 11 (worse) |
| Forks (GitHub) (differs) | 107 (better) | 0 (worse) |
| Last release (differs) | Not published | 2026-10-14 |
| Where it runs (differs) | Installs as a plugin bundle | On your machine (@postsider/mcp) |
| Transport (differs) | Not stated | stdio |
| Tools it declares | Not published | Not published |
| Environment variables it asks for (differs) | Not published | 2, secrets among them: 1 |
| Parts of the bundle (differs) | 1 | 6 |
| Licence | AGPL-3.0 | AGPL-3.0 |
| Repository (differs) | github.com/gitroomhq/postiz-agent | github.com/lumizone/postsider |
| Changes in the last 7 days (differs) | 2 | 3 |
| First seen | 2026-10-11 | 2026-10-11 |
Lines where the two differ have a tinted background and bold values. Where the data itself says which value is better (more marketplaces, a larger figure of the same marketplace, a fresher release, a verified mark on a marketplace that lists both), the better one is also marked green with ▲ and the worse one red with ▼. Where it runs, the transport, the tools, the settings, hooks, the bundle's parts, the licence and the week's changes are marked only as different: more or fewer is not better in itself.
What each says it does
postiz
Social media automation CLI for scheduling posts, managing integrations, uploading media, and tracking analytics across 28+ platforms including X, LinkedIn, Reddit, YouTube, TikTok, Instagram, and more
PostSider
Social media calendar for AI agents: read channels, create drafts, request approval.
How to run each
postiz As a Claude Code plugin
/plugin install postiz@claude-plugins-officialPostSider As a local MCP server: npm package
claude mcp add --env "POSTSIDER_API_KEY=<YOUR_POSTSIDER_API_KEY>" --transport stdio postsider -- npx -y @postsider/mcpRequires: POSTSIDER_API_KEY (secret)
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Tools each declares
Neither one's marketplaces publish a list of tools, so there is nothing to compare.
Settings each asks for
The marketplaces of postiz publish no settings it asks for, so we do not compare settings.
What it can do: postiz · What it can do: PostSider · Compare two other plugins
Data comes from the public marketplace file https://github.com/anthropics/claude-plugins-official/blob/HEAD/.claude-plugin/marketplace.json. Data comes from the public marketplace file https://github.com/anthropics/knowledge-work-plugins/blob/HEAD/.claude-plugin/marketplace.json. Data comes from the public marketplace file https://github.com/anthropics/claude-plugins-community/blob/HEAD/.claude-plugin/marketplace.json. Data comes from public marketplace files in GitHub repositories of their authors. Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.