sciagent-skills vs io.github.littleblakew/msds-chain
sciagent-skills is a plugin bundle for AI coding tools published by jaechang-hits. Marketplaces we read that list it: 2 (Claude Code: claude-plugins-community, Community GitHub marketplaces). io.github.littleblakew/msds-chain is an MCP server published by littleblakew. Marketplaces we read that list it: 2 (Official MCP Registry, Claude Code: claude-plugins-community). As of our marketplace pass on 2026-10-28. 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 |  sciagent-skills |  io.github.littleblakew/msds-chain |
|---|---|---|
| Claude Code: claude-plugins-community | Listed Version: 1.0.0 Forks (GitHub): 45 Stars (GitHub): 384 Not marked · First seen |
Listed Version: 1.5.7 Forks (GitHub): 0 Stars (GitHub): 0 Not marked · First seen |
| Official MCP Registry | Not listed | Listed Version: 1.5.11 Downloads/month (npm): 463 Downloads/week (npm): 48 Forks (GitHub): 0 Stars (GitHub): 0 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 | sciagent-skills | io.github.littleblakew/msds-chain |
|---|---|---|
| Marketplaces that list it | 2 | 2 |
| Stars (GitHub) (differs) | 384 (better) | 0 (worse) |
| Forks (GitHub) (differs) | 45 (better) | 0 (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 | 1, secrets among them: 1 |
| Parts of the bundle (differs) | 139 | 2 |
| Licence (differs) | CC-BY-4.0 | MIT |
| Repository (differs) | github.com/jaechang-hits/sciagent-skills | github.com/littleblakew/msds-chain-mcp |
| Changes in the last 7 days (differs) | 2 | 0 |
| First seen | 2026-10-11 | 2026-10-11 |
| Endpoint at the last check (differs) | no remote endpoint we check | Responded 6 days ago |
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
sciagent-skills
197 ready-to-use life sciences skills that turn Claude into a domain expert for genomics, proteomics, drug discovery, biostatistics, scientific computing, and scientific writing. Each skill provides runnable code examples, key parameters with defaults, and troubleshooting guides for tools like Scanpy, RDKit, BioPython, PyMC, AutoDock Vina, and 190+ more. Scored 92.0% on BixBench-Verified-50 benchmark (+26.7%p over base Claude). Skills are auto-discovered — just describe your task and Claude finds the relevant skill.
io.github.littleblakew/msds-chain
Chemical safety intelligence — 24 tools: compatibility, hazards, PPE, compliance, SDS lookup
How to run each
sciagent-skills As a Claude Code plugin
/plugin marketplace add anthropics/claude-plugins-community
/plugin install sciagent-skills@claude-communityio.github.littleblakew/msds-chain As a Claude Code plugin
/plugin marketplace add anthropics/claude-plugins-community
/plugin install msds-chain@claude-communityRequires: MSDS_API_KEY (secret)
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Only io.github.littleblakew/msds-chain 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 sciagent-skills publish no settings it asks for, so we do not compare settings.
What it can do: sciagent-skills · What it can do: io.github.littleblakew/msds-chain · Compare two other plugins
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.