RunIt

AI writes code. RunIt makes it real.

Auto-generated UI from type hints. Shareable link. Built-in storage. Self-hosted with Docker.

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Demo

Try in 60 seconds

Quick Start

docker run \
  -p 3000:3000 \
  -p 3001:3001 \
  -v /var/run/docker.sock:/var/run/docker.sock \
  -v /tmp/runit-workspaces:/tmp/runit-workspaces \
  -v /tmp/runit-storage:/tmp/runit-storage \
  -e NEXT_PUBLIC_API_URL=http://localhost:3001 \
  -e MASTER_ENCRYPTION_KEY="$(openssl rand -base64 32)" \
  ghcr.io/buildingopen/runit

Open localhost:3000. The API runs on localhost:3001. Paste this:

from runit import app

@app.action
def greet(name: str) -> dict:
    return {"message": f"Hello, {name}!"}

Hit "Go Live." Share the link. That's it.

Clone and run locally

git clone https://github.com/buildingopen/runit
cd runit
npm run setup:local
npm install

Self-host path:

docker-compose up --build

Manual local dev path:

# Terminal 1
cd services/control-plane && npm run dev

# Terminal 2
npm run dev:local

Open http://localhost:3000. The local API should answer on http://localhost:3001/health.

Three Copy-Paste Apps

• Greeting app: start with the snippet in Quick Start
• Visit counter with memory: examples/visit-counter/main.py
• Invoice generator: examples/invoice-generator/main.py

See all examples in examples/README.md.

How It Works

1. You write a Python function with type hints
2. RunIt extracts the schema (OpenAPI)
3. RunIt generates a web form from the schema
4. RunIt runs the function in a Docker sandbox
5. Anyone with the link can use it

Your App Can Remember Things

from runit import app, remember

@app.action
def count_visits(name: str) -> dict:
    visits = (remember("visits") or 0) + 1
    remember("visits", visits)
    return {"message": f"Hello {name}! Visit #{visits}"}

No database setup. Built-in key-value storage.

Examples

Example	What it does
Invoice Generator	Create invoices with automatic tax calculation
Text Analyzer	Count words, find common phrases, detect sentiment
Unit Converter	Convert temperatures and distances between units
Visit Counter	Greet visitors and track counts with remember()

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Self-Hosting

git clone https://github.com/buildingopen/runit
cd runit
docker-compose up --build

That starts the control plane API on localhost:3001 with SQLite and Docker sandboxing. For the all-in-one web + API container, use the Quick Start command above.

Defaults

• Web UI: http://localhost:3000
• Control plane API: http://localhost:3001
• Health check: http://localhost:3001/health

Validated on fresh machine

• Quick Start container opens web on 3000 and API on 3001
• docker-compose up --build serves /health on 3001
• npm run verify passes
• npx playwright test tests/e2e/golden-path.spec.ts passes
• README commands match real behavior

Environment Variables

Variable	Required	Default	Description
MASTER_ENCRYPTION_KEY	Yes		32-byte base64 key for secrets encryption
COMPUTE_BACKEND	No	docker	docker for self-hosted
PORT	No	3001	Server port
API_KEY	No		Bearer token to protect API
RUNNER_IMAGE	No	runit-runner:latest	Docker image for code execution
RUNNER_MEMORY	No	512m	Memory limit per container
RUNNER_CPUS	No	1	CPU limit per container
RUNNER_NETWORK	No	none	Network mode (none for isolation)

See .env.example for the full list.

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For Developers

Python SDK

from runit import app, remember, forget, storage

# Mark functions as actions
@app.action
def my_func(x: int) -> dict:
    return {"result": x * 2}

# Custom action name
@app.action(name="custom_name")
def another_func(y: str) -> dict:
    return {"greeting": f"Hello, {y}!"}

# Full storage API
storage.set("config", {"theme": "dark"})
data = storage.get("config")        # {"theme": "dark"}
storage.get("missing", default=0)   # 0
storage.list()                       # ["config"]
storage.delete("config")

CLI

npm install -g @buildingopen/cli

# Deploy a Python file
runit deploy my-app.py --name "My App"

# List your apps
runit list

# View logs
runit logs

# Check local setup
runit doctor

# Manage storage
runit storage list
runit storage get <key>
runit storage set <key> <value>

# Share your app
runit share create <endpoint_id>

MCP Server (for AI agents)

npm install -g @buildingopen/mcp-server

Gives AI agents (Claude, Cursor, etc.) tools to deploy code, run actions, and manage storage.

API Reference

All routes are under /v1/. Full OpenAPI spec at /v1/openapi.json. Human-friendly API docs landing: /docs.

Apps: GET /v1/projects, POST /v1/projects, GET /v1/projects/:id, DELETE /v1/projects/:id

Deploy: POST /v1/projects/:id/deploy, GET /v1/projects/:id/deploy/status

Runs: POST /v1/runs, GET /v1/runs/:id

Secrets: POST /v1/projects/:id/secrets, GET /v1/projects/:id/secrets

Storage: GET /v1/projects/:id/storage, PUT /v1/projects/:id/storage/:key, GET /v1/projects/:id/storage/:key

Architecture

Function (type hints) -> OpenAPI Schema -> Auto-generated Form -> Shareable Link
                              |
                         Docker Sandbox
                              |
                           SQLite

runit/
+-- apps/web/                  # Next.js web app (paste, deploy, run, share)
+-- packages/
|   +-- cli/                   # CLI: runit deploy, runit run, ...
|   +-- client/                # TypeScript API client
|   +-- mcp-server/            # MCP tools for AI agents
|   +-- openapi-form/          # Auto-generates web forms from functions
|   +-- shared/                # TypeScript types and contracts
|   +-- ui/                    # Shared React components
+-- services/
|   +-- control-plane/         # Hono.js API server
|   +-- runner/                # Python execution runtime + SDK

Development

npm install
npm run build   # Build all packages
npm test        # Run all tests

Why teams pick RunIt

• Turn Python functions into usable apps without building frontend forms by hand
• Keep execution isolated with Docker sandboxing
• Keep state simple with built-in remember() storage
• Share links instantly for demos, internal tools, and experiments

Standards-compatible workflows

RunIt works with standard API and browser tooling:

• OpenAPI contract at GET /v1/openapi.json
• Docs landing at GET /docs
• Browser automation friendly routes (/new, /p/:id, /s/:id)
• CLI + API parity for scripting and CI

Common pairings:

• Postman/Insomnia for API exploration
• Playwright/browser-use style flows for UI automation
• cURL scripts for smoke checks and CI gates

See docs/INTEGRATIONS.md for concrete examples.

Launch Kit

• 2-minute onboarding guide: docs/LAUNCH_FIRST_APP.md
• Distribution copy for launch channels: docs/LAUNCH_KIT.md
• PRR scorecard and go/no-go checks: docs/PRR_SCORECARD.md

Contributing

See CONTRIBUTING.md for guidelines.

License

MIT. See LICENSE.