obsidian-second-brain vs Perplexity API Platform
obsidian-second-brain is a plugin bundle for AI coding tools published by Eugeniu Ghelbur. Marketplaces we read that list it: 1 (Community GitHub marketplaces). Perplexity API Platform is an MCP server published by perplexity.ai. Marketplaces we read that list it: 3 (Official MCP Registry, Docker MCP Catalog, Community GitHub marketplaces). As of our marketplace pass on 2026-10-22. 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 |   Perplexity API Platform | |
|---|---|---|
| Community marketplace eugeniughelbur/obsidian-second-brain | Listed Version: 0.18.1 Forks (GitHub): 593 Stars (GitHub): 4 857 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 1.2.1 Downloads/month (npm): 102 467 Downloads/week (npm): 16 084 Not marked · First seen |
| Docker MCP Catalog | Not listed | Listed Version: sha256:7816f45a6f26 Forks (GitHub): 385 Pulls (Docker Hub): 80 546 Stars (Docker Hub): 17 Stars (GitHub): 2 584 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 | obsidian-second-brain | Perplexity API Platform |
|---|---|---|
| Marketplaces that list it (differs) | 1 (worse) | 3 (better) |
| Stars (GitHub) (differs) | 4 857 (better) | 2 584 (worse) |
| Pulls (Docker Hub) (differs) | No figure on Docker Hub | 80 546 |
| Forks (GitHub) (differs) | 593 (better) | 385 (worse) |
| Last release (differs) | 2026-10-21 (better) | 2026-10-17 (worse) |
| Where it runs (differs) | Installs as a plugin bundle | On your machine (@perplexity-ai/mcp-server) |
| Transport (differs) | Not stated | stdio |
| Tools it declares (differs) | Not published | 3 |
| Environment variables it asks for (differs) | Not published | 2, secrets among them: 1 |
| Hooks it runs (differs) | 3 | 1 |
| Parts of the bundle (differs) | 52 | 2 |
| Licence | MIT | MIT |
| Repository (differs) | github.com/eugeniughelbur/obsidian-second-brain | github.com/ppl-ai/modelcontextprotocol |
| Changes in the last 7 days | 3 | 3 |
| First seen (differs) | 2026-10-18 | 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
obsidian-second-brain
Stop re-explaining your notes to Claude. Turns your Obsidian vault into memory Claude can actually search, and keeps it true: new sources rewrite existing pages, contradictions reconcile, and stale facts get flagged. AI note-taking and PKM for Claude Code.
Perplexity API Platform
Real-time web search, reasoning, and research through Perplexity's API
How to run each
obsidian-second-brain As a Claude Code plugin
/plugin marketplace add eugeniughelbur/obsidian-second-brain
/plugin install obsidian-second-brain@obsidian-second-brainPerplexity API Platform As a local MCP server: npm package
claude mcp add --transport stdio perplexity-api-platform -- npx -y @perplexity-ai/mcp-serverCommands built only from what the marketplaces declare; the full set for every client is on each card.
Tools each declares
The marketplaces of obsidian-second-brain publish no list of tools, so we do not compare tools.
Settings each asks for
The marketplaces of obsidian-second-brain publish no settings it asks for, so we do not compare settings.
What it can do: obsidian-second-brain · What it can do: Perplexity API Platform · 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. 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.