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Failsafe MCP Server

by sunglc
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TypeScript
Local

Failsafe MCP 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

Related MCP server: API Locker

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

This server cannot be installed

A
license - permissive license
-
quality - not tested
D
maintenance

How are these scores calculated?

Maintenance

–Maintainers
–Response time
–Release cycle
–Releases (12mo)
Commit activity

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