Maintenance Mode API Reference

This document provides complete API reference for the maintenance mode endpoints introduced in February 2026.

Overview

The maintenance mode API provides graceful deployment coordination for the streaming duel system. It prevents data loss and market inconsistency by pausing new duel cycles and waiting for active markets to resolve before allowing deployments. Base URL: https://your-server.com (e.g., https://hyperscape.gg) Authentication: All endpoints require ADMIN_CODE header:

x-admin-code: your-admin-code

Endpoints

Enter Maintenance Mode

Pauses new duel cycles and waits for active markets to resolve. Endpoint: POST /admin/maintenance/enter Headers:

Content-Type: application/json
x-admin-code: your-admin-code

Request Body:

{
  "reason": "deployment",
  "timeoutMs": 300000
}

Parameters:

Field	Type	Required	Default	Description
`reason`	string	No	”manual”	Reason for maintenance (logged for audit)
`timeoutMs`	number	No	300000	Maximum wait time for markets to resolve (milliseconds)

Response (200 OK):

{
  "success": true,
  "message": "Maintenance mode activated",
  "safeToDeploy": true,
  "currentPhase": "IDLE",
  "marketStatus": "resolved",
  "pendingMarkets": 0,
  "enteredAt": 1709000000000
}

Response Fields:

Field	Type	Description
`success`	boolean	Always `true` on successful activation
`message`	string	Human-readable status message
`safeToDeploy`	boolean	`true` if safe to deploy, `false` if waiting for markets
`currentPhase`	string	Current duel phase: `IDLE`, `COUNTDOWN`, `FIGHTING`, `ANNOUNCEMENT`
`marketStatus`	string	Market status: `resolved`, `active`, `locked`
`pendingMarkets`	number	Number of unresolved markets
`enteredAt`	number	Unix timestamp (milliseconds) when maintenance mode entered

Error Responses: 401 Unauthorized - Missing or invalid ADMIN_CODE:

{
  "error": "Unauthorized",
  "message": "Invalid or missing admin code"
}

409 Conflict - Already in maintenance mode:

{
  "error": "Conflict",
  "message": "Maintenance mode already active",
  "enteredAt": 1709000000000,
  "reason": "deployment"
}

504 Gateway Timeout - Markets didn’t resolve within timeout:

{
  "success": false,
  "message": "Timeout waiting for markets to resolve",
  "safeToDeploy": false,
  "currentPhase": "FIGHTING",
  "marketStatus": "active",
  "pendingMarkets": 1,
  "timeoutMs": 300000
}

Example (cURL):

curl -X POST https://hyperscape.gg/admin/maintenance/enter \
  -H "x-admin-code: your-admin-code" \
  -H "Content-Type: application/json" \
  -d '{
    "reason": "deployment",
    "timeoutMs": 300000
  }'

Example (JavaScript):

const response = await fetch('https://hyperscape.gg/admin/maintenance/enter', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'x-admin-code': 'your-admin-code',
  },
  body: JSON.stringify({
    reason: 'deployment',
    timeoutMs: 300000,
  }),
});

const data = await response.json();
console.log('Safe to deploy:', data.safeToDeploy);

Check Maintenance Status

Returns current maintenance mode state and safe-to-deploy status. Endpoint: GET /admin/maintenance/status Headers:

x-admin-code: your-admin-code

Response (200 OK):

{
  "active": true,
  "enteredAt": 1709000000000,
  "reason": "deployment",
  "safeToDeploy": true,
  "currentPhase": "IDLE",
  "marketStatus": "resolved",
  "pendingMarkets": 0,
  "elapsedMs": 45000
}

Response Fields:

Field	Type	Description
`active`	boolean	`true` if maintenance mode active, `false` otherwise
`enteredAt`	number \| null	Unix timestamp when entered (null if not active)
`reason`	string \| null	Reason for maintenance (null if not active)
`safeToDeploy`	boolean	`true` if safe to deploy (always `true` if not active)
`currentPhase`	string	Current duel phase
`marketStatus`	string	Market status
`pendingMarkets`	number	Number of unresolved markets
`elapsedMs`	number \| null	Time elapsed since entering (null if not active)

Response (Not Active):

{
  "active": false,
  "enteredAt": null,
  "reason": null,
  "safeToDeploy": true,
  "currentPhase": "IDLE",
  "marketStatus": "resolved",
  "pendingMarkets": 0,
  "elapsedMs": null
}

Error Responses: 401 Unauthorized - Missing or invalid ADMIN_CODE:

{
  "error": "Unauthorized",
  "message": "Invalid or missing admin code"
}

Example (cURL):

curl https://hyperscape.gg/admin/maintenance/status \
  -H "x-admin-code: your-admin-code"

Example (JavaScript):

const response = await fetch('https://hyperscape.gg/admin/maintenance/status', {
  headers: {
    'x-admin-code': 'your-admin-code',
  },
});

const data = await response.json();
if (data.active && data.safeToDeploy) {
  console.log('Safe to deploy');
} else if (data.active) {
  console.log('Waiting for markets to resolve...');
} else {
  console.log('Not in maintenance mode');
}

Exit Maintenance Mode

Resumes normal operations (duel cycles and betting markets). Endpoint: POST /admin/maintenance/exit Headers:

x-admin-code: your-admin-code

Response (200 OK):

{
  "success": true,
  "message": "Maintenance mode deactivated",
  "duration": 120000
}

Response Fields:

Field	Type	Description
`success`	boolean	Always `true` on successful deactivation
`message`	string	Human-readable status message
`duration`	number	Total time spent in maintenance mode (milliseconds)

Error Responses: 401 Unauthorized - Missing or invalid ADMIN_CODE:

{
  "error": "Unauthorized",
  "message": "Invalid or missing admin code"
}

409 Conflict - Not in maintenance mode:

{
  "error": "Conflict",
  "message": "Maintenance mode not active"
}

Example (cURL):

curl -X POST https://hyperscape.gg/admin/maintenance/exit \
  -H "x-admin-code: your-admin-code"

Example (JavaScript):

const response = await fetch('https://hyperscape.gg/admin/maintenance/exit', {
  method: 'POST',
  headers: {
    'x-admin-code': 'your-admin-code',
  },
});

const data = await response.json();
console.log('Maintenance mode exited after', data.duration, 'ms');

Workflow Examples

Manual Deployment

#!/bin/bash
set -e

SERVER_URL="https://hyperscape.gg"
ADMIN_CODE="your-admin-code"

# 1. Enter maintenance mode
echo "Entering maintenance mode..."
curl -X POST "$SERVER_URL/admin/maintenance/enter" \
  -H "x-admin-code: $ADMIN_CODE" \
  -H "Content-Type: application/json" \
  -d '{"reason": "manual deployment", "timeoutMs": 300000}'

# 2. Wait for safe state
echo "Waiting for safe state..."
while true; do
  STATUS=$(curl -s "$SERVER_URL/admin/maintenance/status" \
    -H "x-admin-code: $ADMIN_CODE")
  SAFE=$(echo $STATUS | jq -r '.safeToDeploy')
  
  if [ "$SAFE" = "true" ]; then
    echo "Safe to deploy"
    break
  fi
  
  echo "Waiting for markets to resolve..."
  sleep 10
done

# 3. Deploy (your deployment commands here)
echo "Deploying..."
# git pull, bun install, bun run build, pm2 restart, etc.

# 4. Health check
echo "Checking health..."
curl "$SERVER_URL/health"

# 5. Exit maintenance mode
echo "Exiting maintenance mode..."
curl -X POST "$SERVER_URL/admin/maintenance/exit" \
  -H "x-admin-code: $ADMIN_CODE"

echo "Deployment complete"

Automated CI/CD

# .github/workflows/deploy.yml
- name: Enter maintenance mode
  run: |
    curl -X POST ${{ secrets.SERVER_URL }}/admin/maintenance/enter \
      -H "x-admin-code: ${{ secrets.ADMIN_CODE }}" \
      -H "Content-Type: application/json" \
      -d '{"reason": "CI deployment", "timeoutMs": 300000}'

- name: Wait for safe state
  run: |
    for i in {1..30}; do
      STATUS=$(curl -s ${{ secrets.SERVER_URL }}/admin/maintenance/status \
        -H "x-admin-code: ${{ secrets.ADMIN_CODE }}")
      SAFE=$(echo $STATUS | jq -r '.safeToDeploy')
      
      if [ "$SAFE" = "true" ]; then
        echo "Safe to deploy"
        exit 0
      fi
      
      echo "Waiting for safe state... ($i/30)"
      sleep 10
    done
    
    echo "Timeout waiting for safe state"
    exit 1

- name: Deploy
  run: ./scripts/deploy.sh

- name: Exit maintenance mode
  if: always()
  run: |
    curl -X POST ${{ secrets.SERVER_URL }}/admin/maintenance/exit \
      -H "x-admin-code: ${{ secrets.ADMIN_CODE }}"

Emergency Rollback

#!/bin/bash
set -e

SERVER_URL="https://hyperscape.gg"
ADMIN_CODE="your-admin-code"

# 1. Enter maintenance mode immediately
echo "Emergency maintenance mode..."
curl -X POST "$SERVER_URL/admin/maintenance/enter" \
  -H "x-admin-code: $ADMIN_CODE" \
  -H "Content-Type: application/json" \
  -d '{"reason": "emergency rollback", "timeoutMs": 60000}'

# 2. Rollback (don't wait for safe state in emergency)
echo "Rolling back..."
git checkout <previous-commit>
bun install --frozen-lockfile
bun run build
pm2 restart all

# 3. Exit maintenance mode
echo "Resuming operations..."
curl -X POST "$SERVER_URL/admin/maintenance/exit" \
  -H "x-admin-code: $ADMIN_CODE"

echo "Rollback complete"

State Machine

Maintenance Mode States

NOT_ACTIVE → ENTERING → WAITING → SAFE → EXITING → NOT_ACTIVE
                ↓                    ↓
              TIMEOUT              TIMEOUT

NOT_ACTIVE: Normal operations, duel cycles running ENTERING: Pausing new cycles, locking markets WAITING: Waiting for active markets to resolve SAFE: Safe to deploy (no active duels or markets) TIMEOUT: Timeout reached, deployment can proceed (with caution) EXITING: Resuming operations

Duel Phase States

IDLE → COUNTDOWN → FIGHTING → ANNOUNCEMENT → IDLE

IDLE: No active duel, safe to deploy COUNTDOWN: Duel starting soon, wait for completion FIGHTING: Duel in progress, wait for completion ANNOUNCEMENT: Winner announced, wait for market resolution

Market States

OPEN → LOCKED → RESOLVED

OPEN: Accepting bets, not safe to deploy LOCKED: No new bets, waiting for resolution RESOLVED: Payouts complete, safe to deploy

Integration Examples

Node.js

import fetch from 'node-fetch';

class MaintenanceClient {
  constructor(serverUrl, adminCode) {
    this.serverUrl = serverUrl;
    this.adminCode = adminCode;
  }

  async enter(reason = 'deployment', timeoutMs = 300000) {
    const response = await fetch(`${this.serverUrl}/admin/maintenance/enter`, {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
        'x-admin-code': this.adminCode,
      },
      body: JSON.stringify({ reason, timeoutMs }),
    });

    if (!response.ok) {
      throw new Error(`Failed to enter maintenance mode: ${response.statusText}`);
    }

    return response.json();
  }

  async status() {
    const response = await fetch(`${this.serverUrl}/admin/maintenance/status`, {
      headers: {
        'x-admin-code': this.adminCode,
      },
    });

    if (!response.ok) {
      throw new Error(`Failed to get status: ${response.statusText}`);
    }

    return response.json();
  }

  async exit() {
    const response = await fetch(`${this.serverUrl}/admin/maintenance/exit`, {
      method: 'POST',
      headers: {
        'x-admin-code': this.adminCode,
      },
    });

    if (!response.ok) {
      throw new Error(`Failed to exit maintenance mode: ${response.statusText}`);
    }

    return response.json();
  }

  async waitForSafeState(maxWaitMs = 300000, pollIntervalMs = 10000) {
    const startTime = Date.now();

    while (Date.now() - startTime < maxWaitMs) {
      const status = await this.status();

      if (status.safeToDeploy) {
        return status;
      }

      console.log(`Waiting for safe state... (${status.currentPhase}, ${status.pendingMarkets} pending markets)`);
      await new Promise(resolve => setTimeout(resolve, pollIntervalMs));
    }

    throw new Error('Timeout waiting for safe state');
  }
}

// Usage
const client = new MaintenanceClient('https://hyperscape.gg', process.env.ADMIN_CODE);

async function deploy() {
  try {
    // Enter maintenance mode
    await client.enter('automated deployment');

    // Wait for safe state
    await client.waitForSafeState();

    // Deploy
    console.log('Deploying...');
    // Your deployment logic here

    // Exit maintenance mode
    await client.exit();
    console.log('Deployment complete');
  } catch (error) {
    console.error('Deployment failed:', error);
    // Attempt to exit maintenance mode even on failure
    try {
      await client.exit();
    } catch (exitError) {
      console.error('Failed to exit maintenance mode:', exitError);
    }
    process.exit(1);
  }
}

deploy();

Python

import requests
import time
import json

class MaintenanceClient:
    def __init__(self, server_url, admin_code):
        self.server_url = server_url
        self.admin_code = admin_code
        self.headers = {'x-admin-code': admin_code}

    def enter(self, reason='deployment', timeout_ms=300000):
        response = requests.post(
            f'{self.server_url}/admin/maintenance/enter',
            headers={**self.headers, 'Content-Type': 'application/json'},
            json={'reason': reason, 'timeoutMs': timeout_ms}
        )
        response.raise_for_status()
        return response.json()

    def status(self):
        response = requests.get(
            f'{self.server_url}/admin/maintenance/status',
            headers=self.headers
        )
        response.raise_for_status()
        return response.json()

    def exit(self):
        response = requests.post(
            f'{self.server_url}/admin/maintenance/exit',
            headers=self.headers
        )
        response.raise_for_status()
        return response.json()

    def wait_for_safe_state(self, max_wait_ms=300000, poll_interval_ms=10000):
        start_time = time.time() * 1000

        while (time.time() * 1000 - start_time) < max_wait_ms:
            status = self.status()

            if status['safeToDeploy']:
                return status

            print(f"Waiting for safe state... ({status['currentPhase']}, {status['pendingMarkets']} pending markets)")
            time.sleep(poll_interval_ms / 1000)

        raise TimeoutError('Timeout waiting for safe state')

# Usage
client = MaintenanceClient('https://hyperscape.gg', os.environ['ADMIN_CODE'])

try:
    # Enter maintenance mode
    client.enter('automated deployment')

    # Wait for safe state
    client.wait_for_safe_state()

    # Deploy
    print('Deploying...')
    # Your deployment logic here

    # Exit maintenance mode
    client.exit()
    print('Deployment complete')
except Exception as e:
    print(f'Deployment failed: {e}')
    # Attempt to exit maintenance mode even on failure
    try:
        client.exit()
    except Exception as exit_error:
        print(f'Failed to exit maintenance mode: {exit_error}')
    sys.exit(1)

Best Practices

Timeout Configuration

Recommended Timeouts:

Development: 60000ms (1 minute) - faster iteration
Staging: 180000ms (3 minutes) - balance speed and safety
Production: 300000ms (5 minutes) - maximum safety

Considerations:

Duel duration: ~60-120 seconds
Market resolution: ~10-30 seconds
Network latency: ~1-5 seconds
Buffer: 2x expected duration

Error Handling

Always exit maintenance mode - even on deployment failure:

try {
  await client.enter();
  await client.waitForSafeState();
  await deploy();
} finally {
  // Always exit, even on error
  try {
    await client.exit();
  } catch (error) {
    console.error('Failed to exit maintenance mode:', error);
    // Alert ops team
  }
}

Monitoring

Log all maintenance mode events:

Entry timestamp and reason
Safe state achieved timestamp
Exit timestamp and duration
Any timeouts or errors

Alert on:

Maintenance mode timeout (markets didn’t resolve)
Failed to exit maintenance mode
Maintenance mode active > 10 minutes

Health Endpoint Integration

The /health endpoint includes maintenance mode status:

curl https://hyperscape.gg/health

Response:

{
  "status": "healthy",
  "maintenance": false,
  "streaming": {
    "active": true,
    "phase": "IDLE"
  }
}

Use for:

Load balancer health checks
Monitoring dashboards
Automated alerts

Implementation Details

Source Code: packages/server/src/startup/maintenance-mode.ts Dependencies:

DuelScheduler system (pauses cycles)
Betting market system (locks markets)
Streaming state (monitors phases)

State Storage: In-memory (resets on server restart) Thread Safety: Single-threaded Node.js (no race conditions)

Deployment Guide: docs/deployment-best-practices.md
Streaming Guide: docs/streaming-configuration.md
Railway Setup: docs/railway-dev-prod.md
Environment Variables: packages/server/.env.example

Changelog

February 26, 2026 (Commit 30b52bd): Initial implementation
- Added /admin/maintenance/enter endpoint
- Added /admin/maintenance/status endpoint
- Added /admin/maintenance/exit endpoint
- Integrated with CI/CD workflow
- Added helper scripts

Support

For issues or questions:

GitHub Issues: https://github.com/HyperscapeAI/hyperscape/issues
Documentation: https://github.com/HyperscapeAI/hyperscape/tree/main/docs
Discord: Join our community

​Maintenance Mode API Reference

​Overview

​Endpoints

​Enter Maintenance Mode

​Check Maintenance Status

​Exit Maintenance Mode

​Workflow Examples

​Manual Deployment

​Automated CI/CD

​Emergency Rollback

​State Machine

​Maintenance Mode States

​Duel Phase States

​Market States

​Integration Examples

​Node.js

​Python

​Best Practices

​Timeout Configuration

​Error Handling

​Monitoring

​Health Endpoint Integration

​Implementation Details

​Related Documentation

​Changelog

​Support

Maintenance Mode API Reference

Overview

Endpoints

Enter Maintenance Mode

Check Maintenance Status

Exit Maintenance Mode

Workflow Examples

Manual Deployment

Automated CI/CD

Emergency Rollback

State Machine

Maintenance Mode States

Duel Phase States

Market States

Integration Examples

Node.js

Python

Best Practices

Timeout Configuration

Error Handling

Monitoring

Health Endpoint Integration

Implementation Details

Related Documentation

Changelog

Support