substrate vs io.github.Couchbase-Ecosystem/mcp-server-couchbase
substrate is a plugin bundle for AI coding tools published by PKaldone. Marketplaces we read that list it: 1 (Claude Code: claude-plugins-community). io.github.Couchbase-Ecosystem/mcp-server-couchbase is an MCP server published by Couchbase-Ecosystem. Marketplaces we read that list it: 2 (Official MCP Registry, Docker MCP Catalog). As of our marketplace pass on 2026-10-17. 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 |  substrate |  io.github.Couchbase-Ecosystem/mcp-server-couchbase |
|---|---|---|
| Claude Code: claude-plugins-community | Listed Version: 69709ea No figure published Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed, marked deprecated Version: 0.8.0 Downloads/month (PyPI): 1 200 Downloads/week (PyPI): 247 Forks (GitHub): 34 Stars (GitHub): 34 Not marked · First seen |
| Docker MCP Catalog | Not listed | Listed Version: sha256:85a104706d8b Forks (GitHub): 34 Pulls (Docker Hub): 36 626 Stars (Docker Hub): 4 Stars (GitHub): 34 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 | substrate | io.github.Couchbase-Ecosystem/mcp-server-couchbase |
|---|---|---|
| Marketplaces that list it (differs) | 1 (worse) | 2 (better) |
| Stars (GitHub) (differs) | No figure on GitHub | 34 |
| Pulls (Docker Hub) (differs) | No figure on Docker Hub | 36 626 |
| Forks (GitHub) (differs) | No figure on GitHub | 34 |
| Last release | Not published | Not published |
| Where it runs (differs) | Installs as a plugin bundle | On your machine (couchbase-mcp-server) |
| Transport (differs) | Not stated | stdio |
| Tools it declares (differs) | Not published | 20 |
| Environment variables it asks for (differs) | Not published | 33, secrets among them: 1 |
| Licence (differs) | Not stated | Apache-2.0 |
| Repository (differs) | github.com/pkaldone/substrate-mcp-plugin | github.com/couchbase-ecosystem/mcp-server-couchbase |
| Changes in the last 7 days | 0 | 0 |
| First seen (differs) | 2026-10-12 | 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
substrate
Persistent AI entity framework with causal memory, emotional state, and identity continuity. Gives Claude 94 cognitive layers including episodic memory, value systems, emotional affect, theory of mind, and narrative identity — all persisted across sessions via MCP.
io.github.Couchbase-Ecosystem/mcp-server-couchbase
Couchbase Model Context Protocol Server to interact with Couchbase clusters
How to run each
substrate As a Claude Code plugin
/plugin marketplace add anthropics/claude-plugins-community
/plugin install substrate@claude-communityio.github.Couchbase-Ecosystem/mcp-server-couchbase As a local MCP server: PyPI package
claude mcp add --env "CB_PASSWORD=<YOUR_CB_PASSWORD>" --transport stdio mcp-server-couchbase -- uvx couchbase-mcp-serverRequires: CB_PASSWORD (secret)
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Tools each declares
The marketplaces of substrate publish no list of tools, so we do not compare tools.
Settings each asks for
The marketplaces of substrate publish no settings it asks for, so we do not compare settings.
What it can do: substrate · What it can do: io.github.Couchbase-Ecosystem/mcp-server-couchbase · 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 the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Data comes from the Docker MCP Catalog (desktop.docker.com/mcp/catalog) and Docker Hub. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.