com.userbrain/mcp vs Stunt Double
com.userbrain/mcp is an MCP server published by userbrain.com. Marketplaces we read that list it: 1 (Official MCP Registry). Stunt Double is an MCP server published by stuntdouble.io. 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 |  Stunt Double | |
|---|---|---|
| Official MCP Registry | Listed Version: 1.5.0 No figure published Not marked · First seen |
Listed Version: 1.15.0 Forks (GitHub): 0 Stars (GitHub): 1 Not marked · First seen |
| Claude Code: claude-plugins-community | Not listed | Listed Version: db2886b Forks (GitHub): 0 Stars (GitHub): 1 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 | com.userbrain/mcp | Stunt Double |
|---|---|---|
| Marketplaces that list it (differs) | 1 (worse) | 2 (better) |
| Stars (GitHub) (differs) | No figure on GitHub | 1 |
| Forks (GitHub) (differs) | No figure on GitHub | 0 |
| Last release (differs) | Not published | 2026-10-14 |
| Where it runs (differs) | Remote server (mcp.userbrain.com/mcp) | Remote server (app.stuntdouble.io/api/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) | Not a bundle | 12 |
| Licence (differs) | Not stated | MIT |
| Repository (differs) | Not stated | github.com/stunt-double/stuntdouble-mcp |
| Changes in the last 7 days | 0 | 0 |
| First seen | 2026-10-11 | 2026-10-11 |
| Endpoint at the last check (differs) | Responded 5 days ago | Responded 4 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
com.userbrain/mcp
Explore your Userbrain user test data, summarize feedback, and uncover actionable insights faster.
Stunt Double
Deploy AI user personas to validate user journeys at scale. Find UX friction before real users do.
How to run each
com.userbrain/mcp As a remote MCP server
claude mcp add --transport http com-userbrain-mcp https://mcp.userbrain.com/mcpStunt Double As a remote MCP server
claude mcp add --transport http stunt-double https://app.stuntdouble.io/api/mcpCommands built only from what the marketplaces declare; the full set for every client is on each card.
Both endpoints responded at the last daily 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
Neither one's marketplaces publish the settings it asks for.
What it can do: com.userbrain/mcp · What it can do: Stunt Double · Compare two other plugins
Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. 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.