x-skills vs Postbase
x-skills is a plugin bundle for AI coding tools published by Serge Bulaev. Marketplaces we read that list it: 1 (Community GitHub marketplaces). Postbase is an MCP server published by postbasehq. Marketplaces we read that list it: 2 (Official MCP Registry, npm registry (MCP servers)). As of our marketplace pass on 2026-11-12. 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 |  Postbase | |
|---|---|---|
| Community marketplace sergebulaev/x-skills | Listed Version: 1.0.37 Forks (GitHub): 36 Stars (GitHub): 176 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 0.3.0 Downloads/month (npm): 245 Downloads/week (npm): 65 Forks (GitHub): 1 Stars (GitHub): 10 Not marked · First seen |
| npm registry (MCP servers) | Not listed | Listed Version: 0.3.0 Downloads/month (npm): 245 Downloads/week (npm): 65 Forks (GitHub): 1 Stars (GitHub): 10 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 | x-skills | Postbase |
|---|---|---|
| Marketplaces that list it (differs) | 1 (worse) | 2 (better) |
| Stars (GitHub) (differs) | 176 (better) | 10 (worse) |
| Forks (GitHub) (differs) | 36 (better) | 1 (worse) |
| Last release | Not published | Not published |
| Where it runs (differs) | Installs as a plugin bundle | Remote server or your machine |
| Transport (differs) | Not stated | Streamable HTTP |
| 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) | 9 | Not a bundle |
| Licence (differs) | MIT | AGPL-3.0-or-later |
| Repository (differs) | github.com/sergebulaev/x-skills | github.com/postbasehq/mcp |
| Changes in the last 7 days | 0 | 0 |
| First seen (differs) | 2026-11-05 | 2026-10-11 |
| Endpoint at the last check (differs) | no remote endpoint we check | Responded less than an hour ago, requires authentication |
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
x-skills
Bundle of 9 X (Twitter) marketing skills for Claude Code and Codex with X-native hook formulas, single-tweet and auto-thread writing, a unified humanizer (rewrite plus `--mode audit` pre-publish check), viral hook extraction, reply and quote-tweet drafting, and a weekly content planner. Tweets and threads ship via Publora, which auto-splits long content into numbered threads.
Postbase
Schedule social posts, threads and video to X, LinkedIn, Bluesky, Mastodon and YouTube from your AI.
How to run each
x-skills As a Claude Code plugin
/plugin marketplace add sergebulaev/x-skills
/plugin install x-skills@x-skillsPostbase As a remote MCP server
claude mcp add --transport http postbase https://mcp.postbase.so/mcpRequires: POSTBASE_API_KEY (secret)
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Only Postbase has a remote endpoint we check. How we check endpoints
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 x-skills publish no settings it asks for, so we do not compare settings.
What it can do: x-skills · What it can do: Postbase · Compare two other plugins
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. Package data comes from the public npm registry (registry.npmjs.org). Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.