CHRT API Documentation
Developer-First Maritime APIs
The Stripe for Nautical Charts
Build marine applications with production-ready APIs for ENC chart data, real-time interactions, offline packages, and spatial queries.
What is CHRT?
CHRT provides production-ready APIs for marine and maritime applications. We handle the complexity of nautical chart data (ENC, S-101, S-52) so you can focus on building great user experiences.ENC Chart Data
Access official Electronic Navigational Charts with real-time updates
Interactive Features
Click-to-identify chart features and objects
Offline Packages
Download chart areas for offline use
Spatial Queries
Search and filter chart data by location and attributes
Why Choose CHRT?
Developer-First API Design
Developer-First API Design
- RESTful APIs with consistent patterns
- Comprehensive SDKs for JavaScript, Python, and more
- Extensive documentation and examples
- Webhook support for real-time updates
Production-Ready Infrastructure
Production-Ready Infrastructure
- 99.9% uptime SLA
- Global CDN for fast chart delivery
- Auto-scaling based on demand
- Enterprise-grade security
Maritime Standards Compliance
Maritime Standards Compliance
- Full ENC (S-57) support
- S-101 next-generation charts
- S-52 symbology rendering
- Regular chart updates from official sources
Quick Start
Get up and running in minutes:1
Create Account
Sign up at chrt.com and verify your email
2
Generate API Keys
Create your first API key in the dashboard
3
Make Your First Call
Test the API with a simple chart tile request