API Health Checker

A comprehensive API monitoring skill that checks the health of any endpoint. CHECK TYPES: • HTTP/HTTPS status codes (2xx = healthy, 4xx/5xx = unhealthy) • Response time measurement (P50, P95, P99 latency) • SSL certificate validity and expiration date • DNS resolution time • Response body validation (JSON schema, contains string, regex match) • GraphQL introspection health • WebSocket connection and ping/pong • Custom headers and authentication (Bearer, API key, Basic) MONITORING FEATURES: • Single check or batch check (multiple endpoints) • Historical comparison (is this slower than yesterday?) • Timeout configuration (default 10s) • Retry logic (configurable retries with backoff) • Region simulation (check from different geolocations via headers) • Output formats: JSON, table, Slack webhook, PagerDuty USAGE: ```bash mcplug install api-health-checker # Check single endpoint mcplug run api-health-checker --url "https://api.example.com/health" # Batch check mcplug run api-health-checker --urls "https://api1.com/health,https://api2.com/ping" # With auth mcplug run api-health-checker --url "https://api.example.com" --header "Authorization: Bearer sk-xxx" # API POST /api/v1/install/api-health-checker { "endpoints": [ {"url": "https://api.example.com/health", "method": "GET", "timeout_ms": 5000}, {"url": "https://api.example.com/v2/status", "method": "GET", "expect_status": 200} ], "check_ssl": true } ``` RESPONSE: ```json { "results": [ { "url": "https://api.example.com/health", "status": 200, "healthy": true, "latency_ms": 142, "ssl_valid": true, "ssl_expires": "2026-08-15", "ssl_days_remaining": 137, "dns_ms": 12, "response_size_bytes": 45 } ], "summary": {"total": 1, "healthy": 1, "unhealthy": 0}, "checked_at": "2026-03-31T12:00:00Z" } ``` Perfect for monitoring dashboards and automated health checks.