Quickstart

This page brings up bap-engine on your laptop, registers a product, provisions an Engine for a user, and admits a request. By the end you’ll have a working orchestrator + Engine pair you can hit with curl.

Prerequisites

Docker with Compose v2.
Git.
An Anthropic API key and an OpenAI API key (the orchestrator forwards these to engine containers).
A GitHub PAT with read access to septemberai/engine (only needed at image build time).

Step 1 — Clone and configure

cd ~/work
git clone git@github.com:septemberai/bap-engine.git
cd bap-engine

Create .env from the template:

cp .env.example .env

Open .env and set, at minimum:

# Database (matches docker-compose's postgres service)
ORCH_DATABASE_URL=postgresql://orch_user:orch_local_dev@postgres:5432/orchestrator

# Encryption + admin
ORCH_MASTER_KEY=$(python -c "from cryptography.fernet import Fernet; print(Fernet.generate_key().decode())")
ORCH_ADMIN_KEY=dev-admin-key

# Engine image
ORCH_ENGINE_IMAGE=september-engine:2.3.0
ORCH_ENGINE_BACKEND=docker
ORCH_ENGINE_ENV_PASSTHROUGH=LLM_API_KEY,OPENAI_API_KEY,ANTHROPIC_API_KEY,GEMINI_API_KEY

# LLM provider keys (forwarded to engines)
LLM_API_KEY=sk-ant-...
OPENAI_API_KEY=sk-...
ANTHROPIC_API_KEY=sk-ant-...

# Build-time only
GITHUB_TOKEN=ghp_...

For the full list of variables see Environment variables.

Step 2 — Build the engine image

The orchestrator launches engine containers from a local image. Build it once:

cd ~/work/engine          # the engine repo, not bap-engine
docker build -t september-engine:2.3.0 --target prod .
cd -

Your local Docker now has september-engine:2.3.0, which matches ORCH_ENGINE_IMAGE above.

Step 3 — Start the orchestrator

From the bap-engine repo root:

docker compose up postgres orchestrator

The first run pulls Postgres, builds the orchestrator image, applies migrations, and starts both. You’ll see:

postgres-1      | database system is ready to accept connections
orchestrator-1  | INFO:  Uvicorn running on http://0.0.0.0:8000
orchestrator-1  | INFO:  Application startup complete.

Leave it running. Open a second terminal.

Step 4 — Confirm the orchestrator is up

curl -fsS http://localhost:8000/health

You should see:

{"status": "ok"}

/health is the only endpoint that doesn’t require auth.

Step 5 — Register a product

The orchestrator is multi-product. Before you can provision engines, register a product. This call requires X-Admin-Key (the ORCH_ADMIN_KEY you set in step 1).

curl -X POST http://localhost:8000/products/register \
  -H "X-Admin-Key: dev-admin-key" \
  -H "Content-Type: application/json" \
  -d '{
    "slug": "demo",
    "display_name": "Demo product",
    "policy": {
      "max_engines": 10,
      "rate_limit_rpm": 60
    }
  }'

Response:

{
  "product_id": "5c2f...",
  "slug": "demo",
  "platform_api_key": "pk-sept-aBcDeFg..."
}

Save the platform_api_key. It’s the only time the orchestrator returns it. Set it as an env var for convenience:

export PLATFORM_KEY=pk-sept-aBcDeFg...

Step 6 — Admit a user

POST /engines/{user_id}/admit is the primary entry point. It checks policy, auto-provisions if allowed, and returns the engine URL + key.

curl -X POST http://localhost:8000/engines/demo-user-001/admit \
  -H "X-Platform-Key: $PLATFORM_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "auto_provision": true,
    "auto_wake": true
  }'

Response:

{
  "admitted": true,
  "engine": {
    "engine_id": "...",
    "user_id": "demo-user-001",
    "status": "running",
    "url": "http://engine-...:8000",
    "api_key": "sk-sept-aBcDeFgHi...",
    "engine_version": "september-engine:2.3.0",
    "created_at": "2026-04-27T...",
    "last_health_at": "2026-04-27T..."
  }
}

The orchestrator just spun up a fresh Engine container, applied migrations to its brain, generated an API key, and returned the endpoint. All in a few seconds.

Step 7 — Talk to the Engine

The product (you, in this example) calls the Engine directly. The orchestrator stays out of the data path.

export ENGINE_URL=http://localhost:9001     # or whatever port came back
export ENGINE_KEY=sk-sept-aBcDeFgHi...

curl -N -X POST "$ENGINE_URL/execute" \
  -H "X-Engine-Key: $ENGINE_KEY" \
  -H "Content-Type: application/json" \
  -d '{"message": "Say hello.", "task_id": "demo-001"}'

You should see the SSE stream from the Engine. It worked. If the engine container is bound to 127.0.0.1:9001 only (the default in docker-compose.yml), the URL above works from your host machine. From other containers in the same Docker network, use the engine’s container hostname.

Step 8 — Observe the fleet

curl -fsS http://localhost:8000/status \
  -H "X-Platform-Key: $PLATFORM_KEY"

{
  "total": 1,
  "by_status": {"running": 1},
  "health": "ok",
  "unhealthy_count": 0
}

curl -fsS http://localhost:8000/engines \
  -H "X-Platform-Key: $PLATFORM_KEY"

Lists the user’s engine.

Step 9 — Shut it down

# stop the engine
curl -X POST http://localhost:8000/engines/demo-user-001/stop \
  -H "X-Platform-Key: $PLATFORM_KEY"

# destroy it (removes container + brain volume + registry row)
curl -X DELETE http://localhost:8000/engines/demo-user-001 \
  -H "X-Platform-Key: $PLATFORM_KEY"

# tear down the orchestrator
docker compose down

To wipe the Postgres state too:

docker compose down --volumes

What you’ve just done

You’ve run the full path a real product takes. The orchestrator stood up a fresh Engine, gave you a URL + key, and watched its health. The Engine ran an SSE turn against the LLM. When you were done, you tore it down cleanly. Everything that lives in production lives in this loop. Production deploys add: TLS upstream of the orchestrator, a real secret manager, a backup strategy for the Postgres + brain volumes, and observability.

Where to go next

Architecture — what’s actually running inside the orchestrator container.
Engine contract — the contract the engine promises to fulfill.
Deploy — production setup.
API reference — every endpoint.

Architecture

BAP Engine

Engineering

Prerequisites

Step 1 — Clone and configure

Step 2 — Build the engine image

Step 3 — Start the orchestrator

Step 4 — Confirm the orchestrator is up

Step 5 — Register a product

Step 6 — Admit a user

Step 7 — Talk to the Engine

Step 8 — Observe the fleet

Step 9 — Shut it down

What you’ve just done

Where to go next

​Prerequisites

​Step 1 — Clone and configure

​Step 2 — Build the engine image

​Step 3 — Start the orchestrator

​Step 4 — Confirm the orchestrator is up

​Step 5 — Register a product

​Step 6 — Admit a user

​Step 7 — Talk to the Engine

​Step 8 — Observe the fleet

​Step 9 — Shut it down

​What you’ve just done

​Where to go next

Prerequisites

Step 1 — Clone and configure

Step 2 — Build the engine image

Step 3 — Start the orchestrator

Step 4 — Confirm the orchestrator is up

Step 5 — Register a product

Step 6 — Admit a user

Step 7 — Talk to the Engine

Step 8 — Observe the fleet

Step 9 — Shut it down

What you’ve just done

Where to go next