Engur
Unified tools. Secure keys for agents.
Engur manages your MCP servers, agent skills, rules, and secrets in one native Mac app — then connects Claude, Cursor, Codex, Antigravity, Windsurf and the rest through a single Swift MCP router. Each agent sees a flat, searchable tool surface instead of hundreds of schemas.
macOS 15+
Wire one router into the agents you already use
Set it up once — it shows up everywhere
Engur is the single source of truth for your agent stack. Wire your servers, skills, rules, and secrets in one place; every agent inherits them — and each only loads what it needs, when it needs it.
Wire once, not six times
Add your servers, skills, rules, and secrets to Engur and wire them into every agent in a click — Claude, Cursor, Codex, Antigravity, Windsurf. No hand-editing a config file per app, no drift between them.
Every agent sees a flat surface
Instead of hundreds of tool schemas, each agent gets a small, stable set of tools and searches for the rest. Schemas load only for the call that uses them — smaller prompts, lower cost, sharper tool choices.
Servers run only when used
Downstream servers spawn on demand and are reaped when idle — pure Swift 6, no fleet of Node processes idling in the background. Your laptop stays quiet.
Vault
Secrets stay in your Keychain. Agents get references, not keys.
API keys are the most dangerous thing you hand an agent. Engur keeps them out of plaintext config entirely and resolves them only when — and for whom — they’re actually needed.
Never in plaintext
Keys and tokens live in the macOS Keychain, not in a config file or env var an agent (or a leaked dotfile) can read.
Resolved on demand
Servers reference ${vault:NAME}. The router swaps in the real value only for the exact call that needs it — never ahead of time.
Verified, and approved by you
Only the code-signature-verified router can resolve a secret, and only after you approve it — once, for a session, or for a duration you choose.
Discover
Find and install MCP servers and skills — without leaving the app.
Engur turns scattered GitHub-README setup into a searchable, maintainable local catalog. Search, install, and it’s wired into every agent at once.
Search the MCP registry
Browse the MCP server registry and install with one click — instantly wired into every agent through the router.
Skills from skills.sh
Search agent skills, install a whole repo at once, and group related ones into stacks (bundles) you can toggle together.
Never goes stale
Engur detects when an installed skill has a newer version upstream, so your catalog stays current without manual checking.
Everything your agents share, in one place
Wire once, sync everywhere
Add or change a server, skill, rule, or secret and push it to every agent at once. Move from Claude to Cursor to Codex — your whole setup comes with you, nothing drifts out of sync.
Flat context, any catalog
A constant, tiny tool surface in front of hundreds of tools. Prompts stay small and the model picks the right tool instead of drowning in schemas.
Skills, rules & stacks
Manage load-on-demand skills, system rules, and bundled skill stacks centrally — every wired agent inherits the same expertise and guardrails.
See it, govern it
Watch what your agents actually call in Activity, and control what each server exposes — route it, surface it directly, or switch it off.
Vault for your secrets
API keys live in your Keychain and resolve on demand, only for the verified router, only after you approve.
Native, lazy & open
A pure Swift 6 binary — no npm runtime to babysit, servers spawn only on demand. The router engine is open-source and auditable.
Free. No catch.
Engur is a free, closed-source Mac app built on an open-source engine. No subscription, no trial, no account — download it and go.
The Engur app itself is closed-source, but the router engine that powers it — swift-mcp-router — is open-source (Apache-2.0). You can inspect it, fork it, or run it yourself.
- Free — no subscription, no trial
- No account, no sign-up, no email wall
- Local-first — your setup lives on your Mac
- Built on swift-mcp-router, open-source under Apache-2.0
One setup. Every agent.
Free, native, and built on an open engine. Download Engur and wire your agents in minutes.