App Config.json Platform

Core Capabilities

Built for Scale & Reliability

Engineered to handle millions of configuration requests with sub-50ms latency. Zero downtime updates, built-in validation, and enterprise-grade security.

⚡

Real-Time WebSocket Sync

Push configuration changes to thousands of instances simultaneously. Automatic fallback to long-polling if WebSockets are unavailable.

STREAMING

🔄

Git-Style Versioning

Every config change is immutable and versioned. Rollback to any previous state in one click with full diff visualization.

VERSION CONTROL

🔐

Secrets Management

Encrypt sensitive values at rest using AES-256-GCM. Automatic key rotation and HSM integration for enterprise compliance.

SECURITY

🧪

Feature Flags & Rollouts

Toggle features per environment, user segment, or percentage. Real-time analytics on flag usage and performance impact.

EXPERIMENTATION

🌍

Multi-Region Edge Cache

Global CDN distribution for static configs. Regional failover ensures local availability even during upstream outages.

INFRASTRUCTURE

📜

Schema Validation

Define JSON Schema or Zod validators. Block invalid deployments before they reach production. Custom validation hooks supported.

DEVELOPER EXPERIENCE

System Architecture

How It Works

A distributed, eventually-consistent architecture designed for high throughput and fault tolerance.

Client App

SDK / REST / gRPC

→

Edge Gateway

mTLS / Rate Limiting

→

Config Service

Validation & Routing

→

Global CDN

Cache & WebSocket Hub

Data Flow: Configuration updates are published via the Admin API or dashboard. The system validates against your schema, applies environment-specific overrides, and pushes a new immutable version.

Client Sync: SDKs establish persistent WebSocket connections to the nearest edge node. Config diffs are streamed in real-time. On connection loss, clients fall back to periodic HTTP polling with If-None-Match headers to minimize bandwidth.

Consistency: Reads are eventually consistent via CDN. Critical configs can be forced to strong consistency mode with a slight latency tradeoff.

SDKs & Integrations

Ship Faster with Native SDKs

Lightweight, typed clients for every major runtime. Automatic type generation, retry logic, and offline caching built-in.

                implementation.example
                
            

// Initialize client with auto-sync enabled
import { AppConfig } from 'app-config-sdk';

const client = new AppConfig({
  apiKey: process.env.APP_CONFIG_KEY,
  environment: 'production',
  syncInterval: 5000,
  offlineCache: true
});

// Listen for real-time updates
client.on('change', (config) => {
  console.log('Config updated:', config.version);
  application.applyConfig(config);
});

await client.connect();
            

# Initialize client with type hints & retry logic
from app_config import Client

client = Client(
    api_key="$APP_CONFIG_KEY",
    environment="staging",
    max_retries=3,
    use_websockets=True
)

def on_config_update(config):
    print(f"Updated to v{config.version}")
    app.reload_settings(config.data)

client.on_change(on_config_update)
client.connect()
            

// Thread-safe client with context-aware retries
package main

import (
  "context"
  "log"
  "github.com/appconfig/sdk-go"
)

func main() {
  client := config.New(config.Options{
    APIKey:      "$APP_CONFIG_KEY",
    Environment: "production",
    CacheDir:    "/tmp/ac-cache",
  })

  ctx := context.Background()
  client.OnUpdate(func(cfg *config.Config) {
    log.Printf("Synced v%s", cfg.Version)
  })

  client.Connect(ctx)
}
            

Technical Specifications

Platform Benchmarks & Guarantees

Transparent performance metrics and infrastructure guarantees. Measured in production across 12 global regions.

P95 Latency (Config Fetch)	< 12ms (CDN) / < 45ms (Origin)
WebSocket Push Delay	< 50ms globally
Availability SLA	99.99% uptime guarantee
Data Encryption	AES-256-GCM at rest, TLS 1.3 in transit
Regions	US-East/West, EU-West, AP-South, AP-East, SA-East
Rate Limits (Free)	1,000 requests/day / 100 connections
Rate Limits (Enterprise)	Unlimited requests / 10,000+ concurrent connections
Audit Log Retention	90 days (Pro) / 7 years (Enterprise)
Compliance	SOC 2 Type II, GDPR, HIPAA-ready, ISO 27001

Release History

Product Changelog

Transparent development updates. We ship improvements weekly.

Oct 24, 2024 v3.2.1

Edge Cache Invalidations Fixed

Resolved stale config reads on AWS Tokyo edge nodes. Implemented aggressive cache-busting headers for critical updates.

Sep 11, 2024 v3.2.0

Zod Schema Validation Support

Native integration for Zod validators. Deploy time validation now catches 94% of type mismatches before they hit production.

Aug 03, 2024 v3.1.4

WebSocket Fallback Optimization

Long-polling now respects `If-None-Match` headers, reducing bandwidth usage by 70% on constrained networks.

Jul 19, 2024 v3.1.0

Multi-Environment Overrides

Introduce environment-specific config layers. Base config + dev/staging/prod overrides merge automatically with clear diff visualization.