sanity vs OnPage.dev
sanity is a plugin bundle for AI coding tools published by sanity-io. Marketplaces we read that list it: 5 (Claude Code: claude-plugins-official, Official MCP Registry, Claude: knowledge-work-plugins, Claude Code: claude-plugins-community, Community GitHub marketplaces). OnPage.dev is an MCP server published by onpage.dev. 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 |  sanity |  OnPage.dev |
|---|---|---|
| Claude Code: claude-plugins-official | Listed Version: 1.0.0 Forks (GitHub): 30 Stars (GitHub): 188 Not marked · First seen |
Not listed |
| Official MCP Registry | Listed Version: 2.40.0 Forks (GitHub): 30 Stars (GitHub): 188 Not marked · First seen |
Listed Version: 2.11.0 Forks (GitHub): 0 Stars (GitHub): 2 Not marked · First seen |
| Claude: knowledge-work-plugins | Listed Version: 1.0.0 Forks (GitHub): 30 Stars (GitHub): 188 Not marked · First seen |
Not listed |
| Claude Code: claude-plugins-community | Listed Version: 1.0.0 Forks (GitHub): 30 Stars (GitHub): 188 Not marked · First seen |
Not listed |
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 | sanity | OnPage.dev |
|---|---|---|
| Marketplaces that list it (differs) | 5 (better) | 2 (worse) |
| Stars (GitHub) (differs) | 188 (better) | 2 (worse) |
| Forks (GitHub) (differs) | 30 (better) | 0 (worse) |
| Last release (differs) | Not published | 2026-10-13 |
| Where it runs (differs) | Remote server (mcp.sanity.io) | Remote server (onpage.dev/mcp) |
| Transport | Streamable HTTP | Streamable HTTP |
| Tools it declares | Not published | Not published |
| Environment variables it asks for | Not published | Not published |
| Parts of the bundle (differs) | 14 | 4 |
| Licence | MIT | MIT |
| Repository (differs) | github.com/sanity-io/agent-toolkit | github.com/seoonpage/seo-mcp-server |
| Changes in the last 7 days (differs) | 2 | 11 |
| First seen | 2026-10-11 | 2026-10-11 |
| Endpoint at the last check (differs) | not checked yet | Responded 14 h 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
sanity
Sanity content platform integration with MCP server, agent skills, and slash commands. Query and author content, build and optimize GROQ queries, design schemas, and set up Visual Editing.
OnPage.dev
Free SEO MCP that closes the loop: find, fix, ship as a PR or to a CMS, prove. 37 tools, no key.
How to run each
sanity As a Claude Code plugin
/plugin install sanity@claude-plugins-officialOnPage.dev As a remote MCP server
claude mcp add --transport http onpage https://onpage.dev/mcpCommands built only from what the marketplaces declare; the full set for every client is on each card.
Only OnPage.dev has a remote endpoint we check. How we check endpoints
Tools each declares
Neither the marketplaces of sanity nor its endpoint list any tools, so we do not compare tools.
Settings each asks for
Neither one's marketplaces publish the settings it asks for.
What it can do: sanity · What it can do: OnPage.dev · 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 Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. 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. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.