Deploy Moltbot To Fly

Phase 1: Clone and Setup

1.1 Clone the Moltbot Repository

git clone https://github.com/moltbot/moltbot.git
cd moltbot

1.2 Create .env.example

Create a .env.example file in the project root with the required environment variables:

cat > .env.example << 'EOF'
# Required: Your Anthropic API key
ANTHROPIC_API_KEY=sk-ant-xxxxx

# Optional: OpenAI API key for fallback models
OPENAI_API_KEY=sk-xxxxx

# Required: Gateway token for authentication (generate with: openssl rand -hex 32)
CLAWDBOT_GATEWAY_TOKEN=your-64-char-hex-token

# Optional: Slack Bot Token (if using Slack)
SLACK_BOT_TOKEN=xoxb-xxxxx

# Optional: Discord Bot Token (if using Discord)
DISCORD_BOT_TOKEN=your-discord-bot-token
EOF

Tell the user: "Please copy .env.example to .env and fill in your API keys. At minimum, you need:

• ANTHROPIC_API_KEY: Your Anthropic API key
• CLAWDBOT_GATEWAY_TOKEN: Generate with openssl rand -hex 32"

1.3 Generate Gateway Token

openssl rand -hex 32

Save this token - you'll need it for Fly secrets and for web UI authentication.

Phase 2: Fly.io Configuration

2.1 Create fly.toml

Create or update fly.toml in the project root:

app = 'your-app-name'
primary_region = 'iad'

[build]
  dockerfile = 'Dockerfile'

[env]
  NODE_ENV = 'production'
  TZ = 'UTC'

[processes]
  app = "node dist/index.js gateway --allow-unconfigured --port 3000 --bind lan"

[[mounts]]
  source = 'moltbot_data'
  destination = '/data'

[[vm]]
  size = 'shared-cpu-2x'
  memory = '2gb'

[[services]]
  internal_port = 3000
  protocol = 'tcp'

  [[services.ports]]
    handlers = ['http']
    port = 80
    force_https = true

  [[services.ports]]
    handlers = ['tls', 'http']
    port = 443

CRITICAL: The --bind lan flag is essential. It tells the gateway to bind to the LAN interface which maps to 0.0.0.0 inside the Fly VM.

2.2 Create the Fly App

fly apps create your-app-name

2.3 Create Persistent Volume

fly volumes create moltbot_data --region iad --size 1

2.4 Set Fly Secrets

# Required secrets
fly secrets set ANTHROPIC_API_KEY="sk-ant-xxxxx" -a your-app-name
fly secrets set CLAWDBOT_GATEWAY_TOKEN="$(openssl rand -hex 32)" -a your-app-name

# Optional secrets
fly secrets set OPENAI_API_KEY="sk-xxxxx" -a your-app-name
fly secrets set SLACK_BOT_TOKEN="xoxb-xxxxx" -a your-app-name
fly secrets set DISCORD_BOT_TOKEN="your-token" -a your-app-name

Important: Save the CLAWDBOT_GATEWAY_TOKEN value - you'll need it later for device pairing.

To retrieve the token later:

fly ssh console -a your-app-name -C "printenv CLAWDBOT_GATEWAY_TOKEN"

Phase 3: Deploy

3.1 Deploy to Fly.io

fly deploy -a your-app-name

The first deploy may take a few minutes. Watch for the "listening on ws://0.0.0.0:3000" message in the logs.

3.2 Verify Deployment

fly logs -a your-app-name --no-tail | tail -30

Look for:

• [gateway] listening on ws://0.0.0.0:3000
• [slack] socket mode connected (if using Slack)

Phase 4: Configure Trusted Proxies

CRITICAL STEP: Fly.io routes traffic through internal proxies (172.16.x.x). Without configuring trustedProxies, all connections will fail with "Proxy headers detected from untrusted address".

4.1 SSH into the Fly Machine

fly ssh console -a your-app-name

4.2 Update moltbot.json with trustedProxies

node -e "
const fs = require('fs');
const configPath = '/data/moltbot.json';
let config = {};
try { config = JSON.parse(fs.readFileSync(configPath)); } catch {}

// Ensure gateway config exists
config.gateway = config.gateway || {};

// Add trusted proxies - MUST include the exact Fly proxy IP
// Check your logs for the actual proxy IP (e.g., 172.16.3.162)
config.gateway.trustedProxies = [
  '172.16.0.0/12',
  '10.0.0.0/8',
  '172.16.3.162'  // Add the specific IP from your logs
];

config.gateway.mode = 'local';
config.gateway.bind = 'lan';

fs.writeFileSync(configPath, JSON.stringify(config, null, 2));
console.log('Config updated with trustedProxies');
"

4.3 Verify Config

cat /data/moltbot.json | grep -A5 trustedProxies

4.4 Exit and Restart

exit
fly machines restart -a your-app-name

Wait ~60 seconds for the gateway to fully start.

Phase 5: Device Pairing

When you first access the web UI, you'll see "pairing required" errors. This is because Moltbot requires device authentication for security.

5.1 Access the Web UI

Open: https://your-app-name.fly.dev/

You'll see connection errors - this is expected before pairing.

5.2 Check Pending Pairings

fly ssh console -a your-app-name -C "cat /data/devices/pending.json"

You should see a pending pairing request with a requestId and deviceId.

5.3 Approve the Pairing

fly ssh console -a your-app-name -C 'node -e "
const fs = require(\"fs\");
const pending = JSON.parse(fs.readFileSync(\"/data/devices/pending.json\"));
const paired = JSON.parse(fs.readFileSync(\"/data/devices/paired.json\") || \"{}\");
const requestId = Object.keys(pending)[0];
if (requestId) {
  const device = pending[requestId];
  paired[device.deviceId] = {
    deviceId: device.deviceId,
    publicKey: device.publicKey,
    platform: device.platform,
    clientId: device.clientId,
    role: device.role,
    roles: device.roles,
    scopes: device.scopes,
    approvedAt: Date.now(),
    approvedBy: \"cli\"
  };
  delete pending[requestId];
  fs.writeFileSync(\"/data/devices/pending.json\", JSON.stringify(pending, null, 2));
  fs.writeFileSync(\"/data/devices/paired.json\", JSON.stringify(paired, null, 2));
  console.log(\"Approved device:\", device.deviceId);
} else {
  console.log(\"No pending devices\");
}
"'

5.4 Verify Connection

Refresh the browser. Check the logs:

fly logs -a your-app-name --no-tail | tail -10

Look for: webchat connected conn=... client=moltbot-control-ui

Phase 6: Verification Checklist

Run through this checklist to verify everything works:

## Deployment Verification

- [ ] Gateway listening: `fly logs -a APP | grep "listening on ws"`
- [ ] No proxy warnings: `fly logs -a APP | grep -v "untrusted address"`
- [ ] Web UI connected: `fly logs -a APP | grep "webchat connected"`
- [ ] Health check: `curl https://APP.fly.dev/__health`

Troubleshooting

"Proxy headers detected from untrusted address"

Cause: trustedProxies not configured or doesn't include the Fly proxy IP.

Fix:

1. Check logs for the actual proxy IP: fly logs -a APP | grep "remote="
2. Add that IP to trustedProxies in /data/moltbot.json
3. Restart: fly machines restart -a APP

"pairing required"

Cause: Device not paired.

Fix:

1. Check pending: fly ssh console -a APP -C "cat /data/devices/pending.json"
2. Run the approval script from Phase 5.3
3. Refresh the browser

Gateway not listening on port 3000

Cause: Gateway taking too long to start (~60 seconds is normal).

Fix:

1. Wait 60-90 seconds after deploy/restart
2. Check logs: fly logs -a APP --no-tail | grep "listening"
3. Verify process: fly ssh console -a APP -C "ps -e | grep moltbot"

Invalid --bind error

Cause: Using invalid bind value (e.g., 0.0.0.0).

Fix: Use --bind lan in fly.toml, not --bind 0.0.0.0.

Valid bind values: loopback, lan, tailnet, auto, custom

Complete moltbot.json Example

{
  "meta": {
    "lastTouchedVersion": "2026.1.27-beta.1"
  },
  "auth": {
    "profiles": {
      "anthropic:default": { "provider": "anthropic", "mode": "token" },
      "openai:default": { "provider": "openai", "mode": "token" }
    }
  },
  "agents": {
    "defaults": {
      "model": {
        "primary": "anthropic/claude-sonnet-4-5",
        "fallbacks": ["anthropic/claude-sonnet-4-5", "openai/gpt-4o"]
      },
      "maxConcurrent": 4
    },
    "list": [{ "id": "main", "default": true }]
  },
  "bindings": [{ "agentId": "main", "match": { "channel": "discord" } }],
  "channels": {
    "discord": {
      "enabled": true,
      "groupPolicy": "allowlist",
      "guilds": {
        "YOUR_GUILD_ID": {
          "requireMention": false,
          "channels": { "general": { "allow": true } }
        }
      }
    }
  },
  "gateway": {
    "mode": "local",
    "bind": "lan",
    "trustedProxies": ["172.16.0.0/12", "10.0.0.0/8", "172.16.3.162"]
  },
  "plugins": {
    "entries": {
      "discord": { "enabled": true },
      "slack": { "enabled": true }
    }
  }
}

Quick Reference Commands

# Deploy
fly deploy -a APP

# Logs
fly logs -a APP --no-tail | tail -50

# SSH
fly ssh console -a APP

# Restart
fly machines restart -a APP

# List secrets
fly secrets list -a APP

# Get gateway token
fly ssh console -a APP -C "printenv CLAWDBOT_GATEWAY_TOKEN"

# Check pending devices
fly ssh console -a APP -C "cat /data/devices/pending.json"

# Check paired devices
fly ssh console -a APP -C "cat /data/devices/paired.json"

# Check config
fly ssh console -a APP -C "cat /data/moltbot.json"

Resources

• Moltbot Docs: https://docs.molt.bot/
• Fly.io Docs: https://fly.io/docs/
• Moltbot Fly Deployment Guide: https://docs.molt.bot/platforms/fly