agentcairn vs Perplexity API Platform
agentcairn is a plugin bundle for AI coding tools published by Charles C. Figueiredo. 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 2026-10-15. 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 ccf/agentcairn | Listed Version: 0.4.2 Forks (GitHub): 3 Stars (GitHub): 66 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 1.2.1 Downloads/month (npm): 104 497 Downloads/week (npm): 14 694 Not marked · First seen |
| Docker MCP Catalog | Not listed | Listed Version: sha256:7816f45a6f26 Forks (GitHub): 380 Pulls (Docker Hub): 80 073 Stars (Docker Hub): 17 Stars (GitHub): 2 563 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 | agentcairn | Perplexity API Platform |
|---|---|---|
| Marketplaces that list it (differs) | 1 (worse) | 3 (better) |
| Stars (GitHub) (differs) | 66 (worse) | 2 563 (better) |
| Pulls (Docker Hub) (differs) | No figure on Docker Hub | 80 073 |
| Forks (GitHub) (differs) | 3 (worse) | 380 (better) |
| Last release | Not published | Not published |
| Where it runs (differs) | On your machine (agentcairn) | 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) | 1, secrets among them: 0 | 2, secrets among them: 1 |
| Hooks it runs (differs) | 4 | Not published |
| Parts of the bundle (differs) | 11 | 1 |
| Licence (differs) | Apache-2.0 | MIT |
| Repository (differs) | github.com/ccf/agentcairn | github.com/ppl-ai/modelcontextprotocol |
| Changes in the last 7 days (differs) | 2 | 3 |
| First seen (differs) | 2026-10-14 | 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
agentcairn
Local-first agent memory for Claude Code — recall, remember, ambient capture.
Perplexity API Platform
Real-time web search, reasoning, and research through Perplexity's API
How to run each
agentcairn As a Claude Code plugin
/plugin marketplace add ccf/agentcairn
/plugin install agentcairn@agentcairnPerplexity 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 agentcairn publish no list of tools, so we do not compare tools.
Settings each asks for
Only agentcairn asks for
CAIRN_VAULT
Only Perplexity API Platform asks for
PERPLEXITY_API_KEY (secret)PERPLEXITY_TIMEOUT_MS
Settings as each marketplace publishes them. Asking for fewer is not better in itself.
What it can do: agentcairn · 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.