The open plugin registry for AI agents.
Any provider. Any framework. Self-host your own. Federate from others. Audit everything.
AI agents are going plural — Claude Code, ChatGPT/Assistants, Gemini extensions, MCP servers, custom frameworks. Each ships its own plugin/extension format, and every enterprise is rediscovering the same problems privately: no unified catalog, no governance, no observability, no white-label story.
Atrium is the thin, neutral control plane — LiteLLM for plugin marketplaces. Run one instance, get a polished catalog across providers, with federation, version pinning, AI-assisted curation, encrypted LLM key vault, pin-and-fork workflows, and OpenTelemetry out of the box.
Screenshots
Per-user profile with activity feed. Acting-as switcher in the nav.
Also: light theme · mobile · add-source · sources
Light theme. Toggle in the nav persists per-user.
Responsive down to 375px.
Server-validated form; new sources appear in the catalog on submit.
Each source has a trust tier that drives policy decisions.
Why Atrium
| What enterprises need | What individual provider stores give | What Atrium adds |
|---|
| One catalog across providers | Fragmented per vendor | Claude Code, OpenAI, Gemini, MCP, generic — same browse, same policy |
| A private mirror of approved plugins | Public catalog only | Self-hosted + federated; internal plugins live here |
| Policy on what devs can install | Anyone can add any URL | Role-aware allow-list, quarantine-by-default, CVE gating |
| Own LLM keys + proxy | N/A | Encrypted vault (AES-256-GCM); point at a LiteLLM proxy or direct |
| Automatic catalog hygiene | N/A | AI suggests category + tags using your own LLM keys |
| Version pinning | Upstream-only | Pin any plugin to a specific version; upstream drift never affects users |
| Fork-and-modify workflow | N/A | Snapshot an external plugin, distribute your own modified copy |
| Observability on plugin usage | None | OpenTelemetry traces + per-plugin install / command metrics |
| White-label for your org | Vendor-branded | ATRIUM_ORG_* env vars theme the whole UI |
| Compliance story | None | Immutable audit log, SBOM, signed releases, documented threat model |
Supported providers
| Provider | Format | Atrium can ingest | Atrium can serve |
|---|
| Claude Code | .claude-plugin/marketplace.json | ✅ git / http | ✅ /mkt/marketplace.json |
| MCP | mcpServers[] fragments | ✅ as part of any plugin | ✅ surfaced in plugin detail |
| OpenAI | GPT / Custom GPT / Assistants Actions | ✅ directory URL | ✅ plugin detail + search |
| Gemini | Gemini extensions | ✅ git / http | ✅ plugin detail + search |
| Generic | Your custom agent framework | ✅ via HTTP source | ✅ plugin detail + search |
New providers are thin adapters in lib/ingest/ + optional render extensions to the plugin detail page.
Quickstart (dev)
git clone https://github.com/kushal-goenka/atrium.git
cd atrium
cp .env.example .env.local
pnpm install
pnpm db:push
pnpm dev
Open http://localhost:3000. A seeded catalog of 12 plugins across 4 providers and 4 trust tiers loads automatically.
Quickstart (Docker)
docker compose up -d
