# TrueNAS Scale API v2.0 Reference

**Target Server:** 192.168.2.150
**API Version:** 2.0
**Documentation Type:** Collection-Focused Reference

---

## Table of Contents

1. [Authentication](#authentication)
2. [API Basics](#api-basics)
3. [System Endpoints](#system-endpoints)
4. [Storage Endpoints](#storage-endpoints)
5. [Sharing Endpoints](#sharing-endpoints)
6. [Network Endpoints](#network-endpoints)
7. [Service Endpoints](#service-endpoints)
8. [Task Endpoints](#task-endpoints)
9. [User Management](#user-management)
10. [Error Codes](#error-codes)
11. [Examples](#examples)

---

## Authentication

### API Key Generation

**Method 1: Web UI**
1. Log in to TrueNAS Scale: `https://192.168.2.150`
2. Navigate to: **Account** → **API Keys**
3. Click **Add**
4. Configure:
   - Name: `homelab-collection`
   - Username: `admin` (or your user)
   - Expiration: Optional
5. Click **Save**
6. **IMPORTANT:** Copy the key immediately (shown only once)

**Method 2: CLI (if logged in via SSH)**
```bash
midclt call auth.generate_token 120  # 120 seconds validity
```

### Authentication Headers

**All API requests require:**
```http
Authorization: Bearer <API_KEY>
Content-Type: application/json
```

**Example:**
```bash
curl -X GET "https://192.168.2.150/api/v2.0/system/info" \
  -H "Authorization: Bearer 1-YourAPIKeyHere" \
  -H "Content-Type: application/json" \
  --insecure  # Only if using self-signed certificate
```

### Testing Authentication

```bash
# Test 1: Get system version (minimal permissions)
curl -X GET "https://192.168.2.150/api/v2.0/system/version" \
  -H "Authorization: Bearer ${TRUENAS_API_KEY}" \
  -H "Content-Type: application/json" \
  --insecure

# Expected response:
# {"fullversion": "TrueNAS-SCALE-23.10.1", "version": "23.10.1"}

# Test 2: Get system info (more detailed)
curl -X GET "https://192.168.2.150/api/v2.0/system/info" \
  -H "Authorization: Bearer ${TRUENAS_API_KEY}" \
  -H "Content-Type: application/json" \
  --insecure | jq .
```

---

## API Basics

### Base URL
```
https://192.168.2.150/api/v2.0
```

### Response Format
All responses are JSON-formatted.

**Success Response:**
```json
{
  "id": 1,
  "name": "example",
  "status": "SUCCESS"
}
```

**Error Response:**
```json
{
  "error": "Error message",
  "errname": "EINVAL",
  "extra": null
}
```

### Query Parameters

**Filtering:**
```bash
# Get datasets with specific properties
curl -X GET "https://192.168.2.150/api/v2.0/pool/dataset?name=Vauly" \
  -H "Authorization: Bearer ${TRUENAS_API_KEY}" \
  --insecure
```

### HTTP Methods

| Method | Purpose | Idempotent | Collection Use |
|--------|---------|------------|----------------|
| GET | Retrieve data | Yes | Primary method |
| POST | Create resource | No | Not used |
| PUT | Update resource | Yes | Not used |
| DELETE | Remove resource | Yes | Not used |

**Collection scripts use GET only** (read-only operations).

---

## System Endpoints

### GET /api/v2.0/system/info
**Description:** Get comprehensive system information

**Request:**
```bash
curl -X GET "https://192.168.2.150/api/v2.0/system/info" \
  -H "Authorization: Bearer ${TRUENAS_API_KEY}" \
  --insecure
```

**Response:**
```json
{
  "version": "TrueNAS-SCALE-23.10.1",
  "hostname": "truenas",
  "physmem": 68719476736,
  "model": "AMD Ryzen",
  "cores": 16,
  "physical_cores": 8,
  "loadavg": [0.5, 0.6, 0.7],
  "uptime": "10 days, 5:30:15",
  "uptime_seconds": 896415.0,
  "boottime": "2025-12-04T10:30:00",
  "datetime": "2025-12-14T15:30:15",
  "timezone": "America/New_York"
}
```

**Key Fields:**
- `version`: TrueNAS Scale version
- `physmem`: Physical memory in bytes
- `cores`: Total CPU cores
- `uptime_seconds`: System uptime
- `loadavg`: 1, 5, 15-minute load averages

---

### GET /api/v2.0/system/version
**Description:** Get TrueNAS version string

**Request:**
```bash
curl -X GET "https://192.168.2.150/api/v2.0/system/version" \
  -H "Authorization: Bearer ${TRUENAS_API_KEY}" \
  --insecure
```

**Response:**
```json
{
  "fullversion": "TrueNAS-SCALE-23.10.1",
  "version": "23.10.1"
}
```

---

### GET /api/v2.0/system/advanced
**Description:** Get advanced system settings

**Response includes:**
- Boot scrub interval
- Console settings
- Power management
- Syslog configuration
- Debug settings

---

### GET /api/v2.0/system/general
**Description:** Get general system configuration

**Response includes:**
- Web UI settings (ports, protocols)
- Timezone and language
- Keyboard map
- Certificate configuration

---

## Storage Endpoints

### GET /api/v2.0/pool
**Description:** List all storage pools

**Request:**
```bash
curl -X GET "https://192.168.2.150/api/v2.0/pool" \
  -H "Authorization: Bearer ${TRUENAS_API_KEY}" \
  --insecure
```

**Response:**
```json
[
  {
    "id": 1,
    "name": "Vauly",
    "guid": "1234567890123456789",
    "status": "ONLINE",
    "path": "/mnt/Vauly",
    "scan": {
      "function": "SCRUB",
      "state": "FINISHED",
      "start_time": "2025-12-10T02:00:00",
      "end_time": "2025-12-10T06:30:00",
      "percentage": 100.0,
      "errors": 0
    },
    "is_decrypted": true,
    "healthy": true,
    "size": 3221225472000,
    "allocated": 67108864000,
    "free": 3154116608000,
    "fragmentation": "1%",
    "topology": {
      "data": [],
      "cache": [],
      "log": [],
      "spare": []
    }
  }
]
```

**Key Fields:**
- `name`: Pool name (e.g., "Vauly")
- `status`: Pool health status
- `healthy`: Boolean health indicator
- `size`: Total pool size in bytes
- `free`: Available space in bytes
- `scan`: Last scrub information

---

### GET /api/v2.0/pool/dataset
**Description:** List all datasets and zvols

**Request:**
```bash
curl -X GET "https://192.168.2.150/api/v2.0/pool/dataset" \
  -H "Authorization: Bearer ${TRUENAS_API_KEY}" \
  --insecure
```

**Response:**
```json
[
  {
    "id": "Vauly/iso-vault",
    "type": "FILESYSTEM",
    "name": "Vauly/iso-vault",
    "pool": "Vauly",
    "encrypted": false,
    "mountpoint": "/mnt/Vauly/iso-vault",
    "compression": {
      "parsed": "lz4",
      "value": "lz4"
    },
    "used": {
      "parsed": 67108864000,
      "value": "62.5G"
    },
    "available": {
      "parsed": 3154116608000,
      "value": "2.9T"
    }
  }
]
```

**Query specific dataset:**
```bash
curl -X GET "https://192.168.2.150/api/v2.0/pool/dataset?id=Vauly/iso-vault" \
  -H "Authorization: Bearer ${TRUENAS_API_KEY}" \
  --insecure
```

---

### GET /api/v2.0/disk
**Description:** Get disk inventory

**Response includes:**
- Disk serial numbers
- Model information
- Size and type (HDD/SSD)
- Current pool assignment
- SMART status
- Temperature readings

---

### GET /api/v2.0/disk/temperature
**Description:** Get current disk temperatures

**Request:**
```bash
curl -X GET "https://192.168.2.150/api/v2.0/disk/temperature" \
  -H "Authorization: Bearer ${TRUENAS_API_KEY}" \
  --insecure
```

**Response:**
```json
{
  "sda": 35,
  "sdb": 32,
  "sdc": 34,
  "sdd": 36
}
```

---

### GET /api/v2.0/pool/scrub
**Description:** Get scrub status and history

**Response includes:**
- Current scrub state
- Start/end times
- Bytes processed
- Error count
- Completion percentage

---

### GET /api/v2.0/smart/test/results
**Description:** Get SMART test results for all disks

**Response includes:**
- Test type (short/long)
- Test status
- Completion time
- Any errors found

---

## Sharing Endpoints

### GET /api/v2.0/sharing/nfs
**Description:** Get all NFS share configurations

**Request:**
```bash
curl -X GET "https://192.168.2.150/api/v2.0/sharing/nfs" \
  -H "Authorization: Bearer ${TRUENAS_API_KEY}" \
  --insecure
```

**Response:**
```json
[
  {
    "id": 1,
    "path": "/mnt/Vauly/iso-vault",
    "comment": "ISO storage for Proxmox",
    "networks": ["192.168.2.0/24"],
    "hosts": [],
    "ro": false,
    "maproot_user": "root",
    "maproot_group": "root",
    "security": ["SYS"],
    "enabled": true
  }
]
```

---

### GET /api/v2.0/sharing/smb
**Description:** Get all SMB/CIFS share configurations

**Response includes:**
- Share name and path
- Access permissions
- Guest access settings
- Host allow/deny lists
- Enable status

---

### GET /api/v2.0/sharing/iscsi/target
**Description:** Get iSCSI target configurations

### GET /api/v2.0/sharing/iscsi/extent
**Description:** Get iSCSI extent configurations

---

## Network Endpoints

### GET /api/v2.0/interface
**Description:** Get network interface configurations

**Response includes:**
- Interface name and type
- IP addresses (IPv4/IPv6)
- MTU settings
- Link state
- DHCP configuration

---

### GET /api/v2.0/network/configuration
**Description:** Get global network configuration

**Response includes:**
- Hostname and domain
- Default gateway
- DNS servers
- Service announcement settings

---

### GET /api/v2.0/staticroute
**Description:** Get static route configurations

---

## Service Endpoints

### GET /api/v2.0/service
**Description:** Get status of all services

**Request:**
```bash
curl -X GET "https://192.168.2.150/api/v2.0/service" \
  -H "Authorization: Bearer ${TRUENAS_API_KEY}" \
  --insecure
```

**Response:**
```json
[
  {
    "id": 1,
    "service": "ssh",
    "enable": true,
    "state": "RUNNING",
    "pids": [1234]
  },
  {
    "id": 2,
    "service": "nfs",
    "enable": true,
    "state": "RUNNING",
    "pids": [5678, 5679]
  }
]
```

---

### GET /api/v2.0/ssh
**Description:** Get SSH service configuration

**Response includes:**
- TCP port
- Root login settings
- Password authentication
- SFTP log settings

---

## Task Endpoints

### GET /api/v2.0/cronjob
**Description:** Get cron job configurations

### GET /api/v2.0/pool/snapshottask
**Description:** Get snapshot task configurations

### GET /api/v2.0/rsynctask
**Description:** Get rsync task configurations

### GET /api/v2.0/cloudsync
**Description:** Get cloud sync task configurations

### GET /api/v2.0/replication
**Description:** Get ZFS replication task configurations

---

## User Management

### GET /api/v2.0/user
**Description:** Get all user accounts

**Response includes:**
- Username and UID
- Home directory
- Shell
- Group memberships
- SSH public keys

### GET /api/v2.0/group
**Description:** Get all groups

---

## Error Codes

### HTTP Status Codes

| Code | Meaning | Description |
|------|---------|-------------|
| 200 | OK | Request successful |
| 400 | Bad Request | Invalid request syntax |
| 401 | Unauthorized | Invalid or missing API key |
| 403 | Forbidden | Insufficient permissions |
| 404 | Not Found | Resource doesn't exist |
| 429 | Too Many Requests | Rate limit exceeded |
| 500 | Internal Server Error | Server-side error |

### TrueNAS Error Names

| Error Name | Description | Common Cause |
|------------|-------------|--------------|
| `EINVAL` | Invalid argument | Wrong parameter type or value |
| `ENOENT` | No such file or directory | Resource doesn't exist |
| `EACCES` | Permission denied | Insufficient permissions |
| `EFAULT` | General fault | Internal middleware error |

---

## Examples

### Complete Health Check Script

```bash
#!/bin/bash
# truenas-health-check.sh

TRUENAS_HOST="192.168.2.150"
TRUENAS_API_KEY="${TRUENAS_API_KEY:?API key not set}"

API_BASE="https://${TRUENAS_HOST}/api/v2.0"
CURL_OPTS="-s -H 'Authorization: Bearer ${TRUENAS_API_KEY}' --insecure"

echo "=== TrueNAS Health Check ==="

# System version
echo "System Version:"
curl ${CURL_OPTS} "${API_BASE}/system/version" | jq -r '.fullversion'

# Pool status
echo "Pool Status:"
curl ${CURL_OPTS} "${API_BASE}/pool" | \
  jq -r '.[] | "\(.name): \(.status) (Healthy: \(.healthy))"'

# Disk temperatures
echo "Disk Temperatures:"
curl ${CURL_OPTS} "${API_BASE}/disk/temperature" | \
  jq -r 'to_entries[] | "\(.key): \(.value)°C"'

# Service status
echo "Service Status:"
curl ${CURL_OPTS} "${API_BASE}/service" | \
  jq -r '.[] | select(.enable == true) | "\(.service): \(.state)"'
```

### Export Pool Configuration

```bash
#!/bin/bash
# export-pool-config.sh

POOL_NAME="Vauly"
OUTPUT_DIR="./pool-export-$(date +%Y%m%d)"

mkdir -p "${OUTPUT_DIR}"

# Pool info
curl -s -X GET "https://192.168.2.150/api/v2.0/pool" \
  -H "Authorization: Bearer ${TRUENAS_API_KEY}" \
  --insecure | jq ".[] | select(.name == \"${POOL_NAME}\")" \
  > "${OUTPUT_DIR}/pool-${POOL_NAME}.json"

# Datasets
curl -s -X GET "https://192.168.2.150/api/v2.0/pool/dataset" \
  -H "Authorization: Bearer ${TRUENAS_API_KEY}" \
  --insecure | jq ".[] | select(.pool == \"${POOL_NAME}\")" \
  > "${OUTPUT_DIR}/datasets-${POOL_NAME}.json"

echo "Pool configuration exported to: ${OUTPUT_DIR}"
```

### Monitor Specific Dataset

```bash
#!/bin/bash
# monitor-dataset.sh

DATASET="Vauly/iso-vault"
API_BASE="https://192.168.2.150/api/v2.0"

# URL encode the dataset name
ENCODED_DATASET=$(echo "${DATASET}" | sed 's/\//%2F/g')

curl -s -X GET "${API_BASE}/pool/dataset?id=${ENCODED_DATASET}" \
  -H "Authorization: Bearer ${TRUENAS_API_KEY}" \
  --insecure | jq '{
    name: .name,
    type: .type,
    mountpoint: .mountpoint,
    used: .used.value,
    available: .available.value,
    compression: .compression.value
  }'
```

---

## Middleware CLI Alternative

For commands requiring higher privileges or unavailable via API:

```bash
# Connect via SSH
ssh admin@192.168.2.150

# Use midclt for middleware calls
midclt call system.info
midclt call pool.query
midclt call pool.dataset.query '[["pool", "=", "Vauly"]]'

# Complex queries with filters
midclt call disk.query '[["pool", "=", "Vauly"]]' \
  '{"select": ["name", "serial", "model", "size"]}'
```

---

## Version Compatibility

**This documentation is based on:**
- TrueNAS Scale 23.10.x (Cobia)
- API version 2.0

**Check API version:**
```bash
curl -X GET "https://192.168.2.150/api/v2.0/system/version" \
  -H "Authorization: Bearer ${TRUENAS_API_KEY}" \
  --insecure
```

---

## Additional Resources

**Official Documentation:**
- API Docs: https://www.truenas.com/docs/api/scale_rest_api.html
- WebSocket API: https://www.truenas.com/docs/api/scale_websocket_api.html

**Community:**
- Forums: https://forums.truenas.com/
- GitHub: https://github.com/truenas/middleware

**Tools:**
- API Explorer: `https://192.168.2.150/api/docs/` (built-in)

---

**Document Version:** 1.0.0
**Last Updated:** 2025-12-14
**API Version:** 2.0
**Maintained By:** Scribe Agent
**Homelab Repository:** /home/jramos/homelab