Enterprise-Grade
Developer Utilities Hub

Professional API services for IP inspection, email validation, and conversions. Built on distributed infrastructure for reliability and performance.

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Powerful Developer Utilities

Production-ready APIs designed for reliability, performance, and ease of integration

🌐

IP Inspector

Get detailed IP information including geolocation, ISP data, and request metadata. Privacy-focused with header redaction.

  • GET /v1/ip - Client IP & version
  • GET /v1/whoami - Full request details
  • POST /v1/echo - Request body analysis
✉️

Email Validation

Advanced email validation with syntax checking, disposable domain detection, and optional DNS MX verification.

  • 15,000+ disposable domains blocked
  • RFC-compliant syntax validation
  • Real-time MX record verification
🔄

Unit Converter

Deterministic unit conversions using JSR-385 standards for length, mass, temperature, volume, and speed.

  • 20+ unit types supported
  • High-precision calculations
  • Standardized responses
💾

Byte Converter

Convert between SI (kB, MB) and IEC (KiB, MiB) binary units with precision and clarity.

  • SI and IEC unit support
  • Accurate binary calculations
  • Clear unit differentiation
🎨

Color Converter

Convert between HEX, RGB, and HSL formats. Includes WCAG contrast ratio calculation for accessibility compliance.

  • HEX ↔ RGB ↔ HSL conversion
  • WCAG contrast ratios
  • Accessibility level checking
🔐

Secure & Scalable

OAuth2 authentication, API key management, and distributed rate limiting across all endpoints.

  • Google OAuth2 integration
  • Redis-backed rate limiting
  • Per-endpoint quota controls

Interactive API Playground

Test our APIs directly from your browser - no authentication required for public endpoints

Response

Select an endpoint and click "Execute Request" to see the response...

Code Examples

Enterprise-Grade Infrastructure

Built on modern, battle-tested technologies for reliability and scalability

🚀 Application Layer

  • Spring Boot 3.5.4 - Modern Java framework with reactive capabilities
  • Java 21 - LTS with virtual threads and pattern matching
  • Spring Security - OAuth2 & API key authentication

💾 Data Layer

  • PostgreSQL 16 - Primary database with master-replica replication
  • Redis 7 - Distributed caching and session storage with TLS encryption
  • Flyway - Database migration and version control

⚡ Performance

  • Caffeine - L1 in-memory cache (500 entries, 10min TTL)
  • Redisson - L2 distributed Redis cache with pub/sub invalidation
  • Bucket4j - Token-bucket rate limiting across all nodes

📊 Observability

  • Prometheus - Metrics collection and aggregation
  • Grafana - Real-time dashboards and alerting
  • Logstash - Structured JSON logging with privacy controls

🏗️ Infrastructure

  • Docker - Containerized deployment with compose orchestration
  • Multi-Node Setup - Distributed across multiple VPS instances
  • Automated Backups - Continuous replication and point-in-time recovery

🔒 Security & Compliance

  • TLS 1.3 - End-to-end encryption for all connections
  • GDPR Compliant - Privacy-first design with data minimization
  • RFC 7807 - Standardized error responses

🌐 Distributed Architecture

Our infrastructure spans multiple VPS servers with automatic failover and load balancing:

Master-Replica Replication

PostgreSQL and Redis replicas ensure zero data loss and high availability

Stateless Application Nodes

Horizontally scalable Spring Boot instances with shared state in Redis

Two-Tier Caching

L1 (Caffeine) + L2 (Redis) with distributed cache invalidation via pub/sub

Monitoring & Health

Automated health checks, graceful degradation, and real-time monitoring

Get In Touch

Questions, feedback, or partnership inquiries? We'd love to hear from you.

📧

Email

[email protected]
💻

GitHub

github.com/skillter/synaxicapi
📚

Documentation

Interactive API Docs
📊

Analytics

Analytics & Health
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