Plugin Marketplace

Source of truth: src/lib/plugins/ (marketplace.ts, manager.ts, manifest.ts, scanner.ts, loader.ts), src/app/api/plugins/, and src/app/(dashboard)/dashboard/plugins/ Last updated: 2026-06-28 — v3.8.40

OmniRoute ships a WordPress-style plugin system. Plugins are self-contained directories — each with a plugin.json manifest and an entry file — that hook into the request pipeline (onRequest / onResponse / onError) and into lifecycle events (onInstall / onActivate / onDeactivate / onUninstall).

The Plugin Marketplace is the discovery layer on top of that system. It exposes a browsable catalog of installable plugins. By default the catalog is a small built-in seed registry; an operator can point it at a custom remote registry URL, in which case the fetch is hardened by a DNS-resolving SSRF guard (see Security).

Every plugin route is loopback-only (Tier 1 — LOCAL_ONLY): plugins load and execute code in child processes, so the routes are unreachable from a non-loopback origin regardless of auth. See docs/security/ROUTE_GUARD_TIERS.md.

How It Fits Together

Dashboard (/dashboard/plugins)
  ├─ "Installed" tab  → GET /api/plugins            (listPlugins)
  │                     POST /api/plugins/scan      (pluginManager.scan)
  │                     POST /api/plugins/{name}/activate|deactivate
  │                     DELETE /api/plugins/{name}   (uninstall)
  └─ "Marketplace" tab → GET /api/plugins/marketplace
                          → listMarketplacePlugins()
                            ├─ no custom URL → built-in SEED_REGISTRY
                            └─ custom URL → isSafeMarketplaceUrl() SSRF guard
                                          → safeOutboundFetch(guard:"public-only")

• Registry layer — src/lib/plugins/marketplace.ts: lists / searches the catalog, falling back to the seed registry on any failure.
• Lifecycle layer — src/lib/plugins/manager.ts (pluginManager singleton): install, upgrade, activate, deactivate, uninstall, scan, startup load.
• Manifest layer — src/lib/plugins/manifest.ts: Zod schema + defaults for plugin.json.
• Scanner — src/lib/plugins/scanner.ts: discovers plugins on disk under the plugin directory.
• Loader — src/lib/plugins/loader.ts: spawns each plugin in an isolated child process and brokers hook calls over IPC.

Marketplace Catalog

listMarketplacePlugins() (src/lib/plugins/marketplace.ts) returns a list of MarketplaceEntry objects:

When no custom registry URL is configured, the catalog is the built-in SEED_REGISTRY (currently request-logger, rate-limiter, cost-tracker, and theme-manager). The seed registry is always available — if a configured remote registry is unreachable, returns a non-200 status, or returns an unrecognized body, listMarketplacePlugins() logs a warning and falls back to the seed list.

Note: the marketplace catalog (browse/search) is wired end to end, but one-click marketplace install from the catalog is not yet implemented — the dashboard's "Install" button on a marketplace entry currently shows a "coming soon" notice. Installation today goes through the local-path install flow (POST /api/plugins) and on-disk discovery (POST /api/plugins/scan).

REST API

All endpoints require management auth (requireManagementAuth) and are loopback-only — /api/plugins and /api/plugins/ are listed in LOCAL_ONLY_API_PREFIXES (src/server/authz/routeGuard.ts).

The GET /api/plugins status filter accepts one of installed / active / inactive / error. An invalid value returns 400.

List installed plugins

curl http://localhost:20128/api/plugins \
  -H "Cookie: auth_token=..."

Install from a local path

curl -X POST http://localhost:20128/api/plugins \
  -H "Cookie: auth_token=..." \
  -H "Content-Type: application/json" \
  -d '{ "path": "/absolute/path/to/my-plugin" }'

The path must be absolute and may not contain .. traversal segments or null bytes (enforced by Zod). The source directory must contain a valid plugin.json (or be a parent of one). On success the response is 201 with the installed plugin row.

Browse the marketplace

curl http://localhost:20128/api/plugins/marketplace \
  -H "Cookie: auth_token=..."

Update plugin config

curl -X PUT http://localhost:20128/api/plugins/my-plugin/config \
  -H "Cookie: auth_token=..." \
  -H "Content-Type: application/json" \
  -d '{ "config": { "level": "debug", "maxItems": 100 } }'

PUT .../config validates each provided value against the plugin's configSchema (declared in the manifest): number fields honor min/max, select fields must match the declared enum. Keys not present in the schema are allowed through.

Configuration

Plugin directory

Plugins live under the OmniRoute data directory:

~/.omniroute/plugins/<plugin-name>/
  ├─ plugin.json
  └─ index.js          # (or whatever manifest.main points to)

getDefaultPluginDir() (src/lib/plugins/scanner.ts) resolves this to <home>/.omniroute/plugins, where <home> is taken from the HOME / USERPROFILE environment variables. POST /api/plugins/scan discovers any subdirectory there that holds a valid plugin.json and registers it.

Custom marketplace registry URL

The marketplace catalog source is read from the pluginMarketplaceUrl setting (src/lib/plugins/marketplace.ts reads settings.pluginMarketplaceUrl). When set to an http(s) URL, listMarketplacePlugins() fetches that URL and accepts either a top-level JSON array of entries or an object with a plugins array; entries without a string name are filtered out. When unset (or when the fetch fails the SSRF guard / returns a bad response), the built-in seed registry is used.

The dashboard "Marketplace" tab exposes a field for this URL (read back from GET /api/settings).

Implementation note: the dashboard "Save" action sends pluginMarketplaceUrl to PATCH /api/settings. At the time of writing this key is not declared in updateSettingsSchema (src/shared/validation/settingsSchemas.ts), so verify persistence in your release before relying on it — the read path (getSettings() → listMarketplacePlugins()) honors the key once it is present in the settings store.

Security

Route tier — loopback only

Plugins execute code in spawned child processes, so the entire /api/plugins surface is classified LOCAL_ONLY (Tier 1). Loopback enforcement runs unconditionally before any auth check, so a leaked management token reaching the box over a tunnel still cannot install, activate, or uninstall a plugin. See docs/security/ROUTE_GUARD_TIERS.md and Hard Rules #15 / #17.

Marketplace registry SSRF guard

A custom registry URL is attacker-influenceable configuration, so before fetching it listMarketplacePlugins() runs it through two layers:

1. isSafeMarketplaceUrl(url) (src/lib/plugins/marketplace.ts):
   • Rejects anything that is not http: / https:.
   • Rejects literal private/loopback/link-local/ULA hosts (IPv4 and IPv6, including IPv4-mapped) via the canonical isPrivateHost (src/shared/network/outboundUrlGuard.ts).
   • Resolves both A and AAAA records and rejects if any resolved address is private — closing the public-hostname → private-IP bypass.
   • Fails closed: a DNS resolution failure rejects the URL.
2. safeOutboundFetch(url, { guard: "public-only", timeoutMs: 5000 }) (src/shared/network/safeOutboundFetch.ts): re-applies the public-only URL guard at fetch time and blocks redirects (no public → private 30x pivot).

A URL that fails either layer does not abort the request — the marketplace silently falls back to the built-in seed registry and logs a warning.

This guard was hardened in PR #3774 specifically to resolve A + AAAA and use the canonical isPrivateHost instead of an IPv4-only check.

Plugin execution isolation

• Process isolation — loadPlugin() (src/lib/plugins/loader.ts) spawns each plugin in a separate Node.js child process and communicates over IPC. Hook calls have a timeout with SIGTERM → SIGKILL escalation.
• Env allowlist — the child receives only an allowlisted set of environment variables; the broader set is only granted when the manifest requests the env permission.
• Path containment — install/upgrade/uninstall assert that the plugin directory and manifest.main resolve within the managed plugin root before any copy or recursive delete (guards against tampered DB paths and ../ traversal in manifest.main). Activation resolves symlinks via realpath and refuses to load an entry point that escapes the plugin directory.
• Optional integrity pin — a manifest may declare an integrity (sha256-<base64>, SRI format) field. When present, the loader verifies the entry file hash at load time and refuses to activate on mismatch. It is opt-in tamper-detection, not a security boundary — loopback-only routing and the permission model are the real boundaries.

Manifest (plugin.json)

Validated by PluginManifestSchema (src/lib/plugins/manifest.ts):

Permissions are drawn from the enum network / file-read / file-write / env / exec.

Lifecycle Flow

install (POST /api/plugins, path)
  → scan/validate manifest → copy to staging → assert main within dir
  → atomic rename into ~/.omniroute/plugins/<name> → insert DB row
  → fire onInstall → if enabledByDefault: activate

activate (POST /api/plugins/{name}/activate)
  → realpath containment check → loadPlugin() (spawn child process)
  → register declared hooks → status = "active" → fire onActivate

deactivate (POST /api/plugins/{name}/deactivate)
  → fire onDeactivate (BEFORE unregister) → unregister hooks
  → kill child process → status = "inactive"

uninstall (DELETE /api/plugins/{name})
  → deactivate if active → fire onUninstall
  → containment-checked recursive delete of plugin dir → delete DB row

Re-running install against a directory whose manifest version is strictly newer than the installed version auto-upgrades (clean reinstall; config resets to defaults). A same-or-older version is rejected.

Database

Table plugins (migration 076_create_plugins.sql):

Plugin metrics/analytics are tracked in additional tables (090_plugin_metrics.sql, 091_plugin_analytics.sql).

Dashboard

The dashboard page at /dashboard/plugins (src/app/(dashboard)/dashboard/plugins/page.tsx) provides two tabs:

• Installed — lists installed plugins with their declared hooks, an activate/deactivate toggle, an uninstall button, and a "Scan for plugins" action (POST /api/plugins/scan).
• Marketplace — shows the catalog from GET /api/plugins/marketplace with a field to set the custom registry URL.

A per-plugin config page lives at /dashboard/plugins/[name]/config (src/app/(dashboard)/dashboard/plugins/[name]/config/page.tsx).

See Also

• docs/security/ROUTE_GUARD_TIERS.md — why /api/plugins is loopback-only (Tier 1)
• docs/frameworks/SKILLS.md — the related skills framework (src/lib/skills/); plugins may declare skills in their manifest
• docs/frameworks/WEBHOOKS.md — event-driven outbound integrations
• docs/security/ERROR_SANITIZATION.md — the buildErrorBody() pattern every plugin route uses for error responses