Failsafe Server

Credential resilience for AI agents.

Your agent runs on 50+ credentials. Failsafe makes sure they never break.

• 🔑 Store credentials with AES-256 encryption
• 🏥 Monitor health with automatic provider-specific checks
• 🔀 Failover to backup credentials when primary fails
• ⏰ Warn before credentials expire
• 🔌 MCP native — works with Claude Code, Cursor, LangChain, and any MCP client

Quick Start

With Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "failsafe": {
      "command": "npx",
      "args": ["-y", "failsafe-mcp-server"]
    }
  }
}

With Claude Code

claude mcp add failsafe -- npx -y failsafe-mcp-server

Manual

npm install -g failsafe-mcp-server
failsafe-mcp-server

What It Does

Store a credential

> failsafe_store provider:"openai" key:"sk-abc123" backup_key:"sk-xyz789"

✓ Credential stored for openai. Backup configured.

Get a credential (with auto-failover)

> failsafe_get provider:"openai"

{
  "key": "sk-abc123",
  "source": "primary",
  "status": "healthy"
}

If the primary key is unhealthy, Failsafe automatically returns the backup:

> failsafe_get provider:"openai"

{
  "key": "sk-xyz789",
  "source": "backup",
  "warnings": ["Primary credential is unhealthy. Using backup."]
}

List all credentials

> failsafe_list

{
  "summary": { "total": 4, "healthy": 3, "unhealthy": 1, "expired": 0 },
  "credentials": [
    { "provider": "openai", "status": "healthy", "has_backup": true },
    { "provider": "anthropic", "status": "healthy", "has_backup": false },
    { "provider": "github", "status": "unhealthy", "has_backup": true },
    { "provider": "stripe", "status": "healthy", "has_backup": false }
  ]
}

Run health checks

> failsafe_health

{
  "summary": { "total": 4, "healthy": 3, "unhealthy": 1 },
  "results": [
    { "provider": "openai", "status": "healthy", "latency_ms": 245 },
    { "provider": "anthropic", "status": "healthy", "latency_ms": 189 },
    { "provider": "github", "status": "unhealthy", "response_code": 401 },
    { "provider": "stripe", "status": "healthy", "latency_ms": 312 }
  ]
}

Supported Providers

Built-in health checks for:

Provider	Health Check Endpoint
OpenAI	GET /v1/models
Anthropic	GET /v1/models
GitHub	GET /user
Stripe	GET /v1/balance

Any other provider works with a custom health_check_url:

> failsafe_store provider:"my-saas" key:"token_abc" health_check_url:"https://api.my-saas.com/health"

Security

• All credentials encrypted with AES-256-GCM at rest
• Master key auto-generated and stored in ~/.failsafe/master.key (mode 0600)
• Or set FAILSAFE_MASTER_KEY environment variable
• 100% local — credentials never leave your machine
• No telemetry, no network calls except health checks to your own providers

How Failover Works

Agent requests credential for "openai"
  ↓
Failsafe checks primary key status
  ↓
├─ Healthy? → return primary key
├─ Unhealthy/Expired? → check for backup
│   ├─ Backup exists? → return backup key + warning
│   └─ No backup? → return primary key + warning

Data Storage

All data stored locally in ~/.failsafe/:

~/.failsafe/
├── master.key         # Encryption key (auto-generated)
└── credentials.json   # Encrypted credential store

Roadmap

• Store / Get / List / Remove credentials
• AES-256-GCM encryption
• Health checks (OpenAI, Anthropic, GitHub, Stripe + custom)
• Automatic failover (primary → backup)
• Expiration warnings
• Background health monitoring (cron)
• Multi-key rotation / load balancing
• Webhook notifications (Slack, Telegram)
• Failsafe Cloud (hosted dashboard + team management)

License

MIT

Links

• Website: failsafe.world
• GitHub: github.com/sunglc/failsafe-mcp-server
• Twitter: @climber_sun