# Smol Machines — Orthogonal API

> Pay-per-use API on Orthogonal. Each call is billed to your Orthogonal balance.
> Base API: `https://mono.orthogonal.com/v1/run` · [llms.txt](https://mono.orthogonal.com/llms.txt) · [browse all APIs](https://mono.orthogonal.com/catalog)

Cloud microVM platform. Create isolated Linux VMs, execute commands, run code, manage files and volumes. Each machine has its own kernel with configurable CPU, memory, networking, and storage.

**Verified:** yes

## Access

**Run API:** `POST https://mono.orthogonal.com/v1/run`
**Auth:** `Authorization: Bearer $ORTHOGONAL_API_KEY`
Get an API key at https://mono.orthogonal.com/account/keys

Every call goes through the unified Run API: send the API `slug`, the endpoint `path`, and the `query`/`body` parameters. The response is `{ "success": true, "price": "<usd>", "data": { ... } }`.

## Endpoints

### Download File

Download a file from a machine

`GET /v1/machines/{id}/files`

**Cost:** Free

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `id` | string | Yes | Path parameter — substitute directly into the endpoint `path`. |

```bash
# Replace {id} in "path" with real values before sending
curl -X POST 'https://mono.orthogonal.com/v1/run' \
  -H 'Authorization: Bearer $ORTHOGONAL_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"api":"smolmachines","path":"/v1/machines/{id}/files","method":"GET"}'
```

### Upload File

Upload a file to a machine

`POST /v1/machines/{id}/files`

**Cost:** Free

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `id` | string | Yes | Path parameter — substitute directly into the endpoint `path`. |

```bash
# Replace {id} in "path" with real values before sending
curl -X POST 'https://mono.orthogonal.com/v1/run' \
  -H 'Authorization: Bearer $ORTHOGONAL_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"api":"smolmachines","path":"/v1/machines/{id}/files"}'
```

### List Sessions

List sessions for a machine

`GET /v1/machines/{id}/sessions`

**Cost:** Free

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `id` | string | Yes | Path parameter — substitute directly into the endpoint `path`. |

```bash
# Replace {id} in "path" with real values before sending
curl -X POST 'https://mono.orthogonal.com/v1/run' \
  -H 'Authorization: Bearer $ORTHOGONAL_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"api":"smolmachines","path":"/v1/machines/{id}/sessions","method":"GET"}'
```

### Create Session

Create a persistent session that preserves working directory and environment across exec calls

`POST /v1/machines/{id}/sessions`

**Cost:** Free

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `id` | string | Yes | Path parameter — substitute directly into the endpoint `path`. |
| `cwd` | string | No |  |
| `env` | object | No |  |
| `id` | string | No |  |

```bash
# Replace {id} in "path" with real values before sending
curl -X POST 'https://mono.orthogonal.com/v1/run' \
  -H 'Authorization: Bearer $ORTHOGONAL_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"api":"smolmachines","path":"/v1/machines/{id}/sessions","body":{"cwd":"<string>","env":"<object>","id":"<string>"}}'
```

### Delete Session

Delete a session

`DELETE /v1/machines/{id}/sessions/{session_id}`

**Cost:** Free

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `id` | string | Yes | Path parameter — substitute directly into the endpoint `path`. |
| `session_id` | string | Yes | Path parameter — substitute directly into the endpoint `path`. |

```bash
# Replace {id}, {session_id} in "path" with real values before sending
curl -X POST 'https://mono.orthogonal.com/v1/run' \
  -H 'Authorization: Bearer $ORTHOGONAL_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"api":"smolmachines","path":"/v1/machines/{id}/sessions/{session_id}","method":"DELETE"}'
```

### Run Code

Run Python or JavaScript code directly in a machine

`POST /v1/machines/{id}/code`

**Cost:** Free

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `id` | string | Yes | Path parameter — substitute directly into the endpoint `path`. |
| `code` | string | Yes |  |
| `cwd` | string | No |  |
| `env` | object | No |  |
| `language` | string | Yes |  |
| `timeoutSeconds` | number | No |  |

```bash
# Replace {id} in "path" with real values before sending
curl -X POST 'https://mono.orthogonal.com/v1/run' \
  -H 'Authorization: Bearer $ORTHOGONAL_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"api":"smolmachines","path":"/v1/machines/{id}/code","body":{"code":"<string>","cwd":"<string>","env":"<object>","language":"<string>","timeoutSeconds":"<number>"}}'
```

### Session Exec

Execute a command within a persistent session. Session preserves working directory and environment across calls.

`POST /v1/machines/{id}/sessions/{session_id}/exec`

**Cost:** Free

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `id` | string | Yes | Path parameter — substitute directly into the endpoint `path`. |
| `session_id` | string | Yes | Path parameter — substitute directly into the endpoint `path`. |
| `command` | string | Yes | Shell command string (e.g. "echo hello") or argv array (e.g. ["echo","hello"]) |
| `cwd` | string | No | Working directory for the command |
| `env` | object | No | Environment variables as key-value pairs |
| `stdin` | string | No | String to pass as stdin to the command |
| `stream` | boolean | No | If true, stream output as server-sent events |
| `timeoutSeconds` | number | No | Max execution time in seconds |

```bash
# Replace {id}, {session_id} in "path" with real values before sending
curl -X POST 'https://mono.orthogonal.com/v1/run' \
  -H 'Authorization: Bearer $ORTHOGONAL_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"api":"smolmachines","path":"/v1/machines/{id}/sessions/{session_id}/exec","body":{"command":"<string>","cwd":"<string>","env":"<object>","stdin":"<string>","stream":"<boolean>","timeoutSeconds":"<number>"}}'
```

### Create Machine

Create a new microVM. Minimal example: {"source":{"type":"image","reference":"alpine:3.20"},"resources":{"cpus":1,"memoryMb":512},"ttlSeconds":3600}. Poll GET /v1/machines/{id} until ready is true before running commands.

`POST /v1/machines`

**Estimated cost:** Dynamic — use `"dryRun": true` in the Run API request to check the exact cost before calling.

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `source` | object | Yes | Image source. Example: {"type":"image","reference":"alpine:3.20"} |
| `resources` | object | Yes | CPU and memory allocation. Example: {"cpus":1,"memoryMb":512} |
| `ttlSeconds` | number | Yes | Max machine lifetime in seconds (e.g. 3600 for 1 hour) |
| `name` | string | No | Human-readable machine name |
| `network` | object | No | Network policy. Example: {"mode":"open"} or {"mode":"blocked"} |
| `env` | object | No | Environment variables as key-value pairs |
| `workdir` | string | No | Working directory inside the VM |
| `autoStopSeconds` | number | No | Seconds of inactivity before auto-stop |
| `ephemeral` | boolean | No | If true, machine is automatically deleted when stopped. Machine boots into running state and is cleaned up after stop or TTL expiry. |
| `mounts` | array | No | Volume mounts for persistent storage |

```bash
curl -X POST 'https://mono.orthogonal.com/v1/run' \
  -H 'Authorization: Bearer $ORTHOGONAL_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"api":"smolmachines","path":"/v1/machines","body":{"source":"<object>","resources":"<object>","ttlSeconds":"<number>","name":"<string>","network":"<object>","env":"<object>","workdir":"<string>","autoStopSeconds":"<number>","ephemeral":"<boolean>","mounts":"<array>"}}'
```

### Machine Events

Get machine event log

`GET /v1/machines/{id}/events`

**Cost:** Free

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `id` | string | Yes | Path parameter — substitute directly into the endpoint `path`. |

```bash
# Replace {id} in "path" with real values before sending
curl -X POST 'https://mono.orthogonal.com/v1/run' \
  -H 'Authorization: Bearer $ORTHOGONAL_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"api":"smolmachines","path":"/v1/machines/{id}/events","method":"GET"}'
```

### Execute Command

Run a command inside a machine. Pass command as a shell string ("ls -la") or argv array (["ls","-la"]). Machine must be ready before calling.

`POST /v1/machines/{id}/exec`

**Cost:** Free

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `id` | string | Yes | Path parameter — substitute directly into the endpoint `path`. |
| `command` | string | Yes | Shell command string (e.g. "echo hello") or argv array (e.g. ["echo","hello"]) |
| `cwd` | string | No | Working directory for the command |
| `env` | object | No | Environment variables as key-value pairs |
| `stdin` | string | No | String to pass as stdin to the command |
| `stream` | boolean | No | If true, stream output as server-sent events |
| `timeoutSeconds` | number | No | Max execution time in seconds |

```bash
# Replace {id} in "path" with real values before sending
curl -X POST 'https://mono.orthogonal.com/v1/run' \
  -H 'Authorization: Bearer $ORTHOGONAL_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"api":"smolmachines","path":"/v1/machines/{id}/exec","body":{"command":"<string>","cwd":"<string>","env":"<object>","stdin":"<string>","stream":"<boolean>","timeoutSeconds":"<number>"}}'
```

### Delete Machine

Permanently delete a machine and its storage

`DELETE /v1/machines/{id}`

**Cost:** Free

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `id` | string | Yes | Path parameter — substitute directly into the endpoint `path`. |

```bash
# Replace {id} in "path" with real values before sending
curl -X POST 'https://mono.orthogonal.com/v1/run' \
  -H 'Authorization: Bearer $ORTHOGONAL_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"api":"smolmachines","path":"/v1/machines/{id}","method":"DELETE"}'
```

### Start Machine

Start a stopped machine

`POST /v1/machines/{id}/start`

**Cost:** Free

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `id` | string | Yes | Path parameter — substitute directly into the endpoint `path`. |

```bash
# Replace {id} in "path" with real values before sending
curl -X POST 'https://mono.orthogonal.com/v1/run' \
  -H 'Authorization: Bearer $ORTHOGONAL_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"api":"smolmachines","path":"/v1/machines/{id}/start"}'
```

### Get Machine

Get machine details and status. Poll until ready is true before executing commands.

`GET /v1/machines/{id}`

**Cost:** Free

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `id` | string | Yes | Path parameter — substitute directly into the endpoint `path`. |

```bash
# Replace {id} in "path" with real values before sending
curl -X POST 'https://mono.orthogonal.com/v1/run' \
  -H 'Authorization: Bearer $ORTHOGONAL_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"api":"smolmachines","path":"/v1/machines/{id}","method":"GET"}'
```

### Stop Machine

Stop a running machine. Preserves disk state.

`POST /v1/machines/{id}/stop`

**Cost:** Free

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `id` | string | Yes | Path parameter — substitute directly into the endpoint `path`. |

```bash
# Replace {id} in "path" with real values before sending
curl -X POST 'https://mono.orthogonal.com/v1/run' \
  -H 'Authorization: Bearer $ORTHOGONAL_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"api":"smolmachines","path":"/v1/machines/{id}/stop"}'
```

### List Machines

List all machines. Use to discover existing machine IDs for recovery or cleanup.

`GET /v1/machines`

**Cost:** Free

_No parameters required._

```bash
curl -X POST 'https://mono.orthogonal.com/v1/run' \
  -H 'Authorization: Bearer $ORTHOGONAL_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"api":"smolmachines","path":"/v1/machines","method":"GET"}'
```

---

Full details and an interactive quickstart: https://mono.orthogonal.com/publisher/smolmachines