Documentation

AI API Gateway Migration Guide

Complete step-by-step guide for transitioning from direct provider APIs to a unified gateway. Includes code examples, timeline estimates, and zero-downtime strategies.

Migration Process

Four-Phase Migration

Assessment

Audit current API usage, document dependencies, identify critical paths, and establish baseline metrics for comparison.

1-2 days

Setup

Configure gateway credentials, set up routing rules, implement logging, and create staging environment for testing.

2-3 days

Migration

Replace direct API calls with gateway endpoints, update configurations, run integration tests, validate responses.

3-5 days

Optimization

Enable caching, configure fallbacks, optimize routing, monitor performance, and document best practices.

2-3 days

Before — Direct API

OpenAI Direct Integration

// Multiple provider integrations
import OpenAI from 'openai';
import Anthropic from '@anthropic-ai/sdk';

const openai = new OpenAI({
  apiKey: process.env.OPENAI_API_KEY
});

const anthropic = new Anthropic({
  apiKey: process.env.ANTHROPIC_API_KEY
});

// Separate logic for each provider
async function generateText(prompt, provider) {
  if (provider === 'openai') {
    return await openai.chat.completions.create({
      model: 'gpt-4',
      messages: [{ role: 'user', content: prompt }]
    });
  } else if (provider === 'anthropic') {
    return await anthropic.messages.create({
      model: 'claude-3-opus',
      max_tokens: 1024,
      messages: [{ role: 'user', content: prompt }]
    });
  }
}

After — Unified Gateway

Gateway Integration

// Single unified interface
import Gateway from '@ai-gateway/sdk';

const gateway = new Gateway({
  apiKey: process.env.GATEWAY_API_KEY
});

// Unified API for all providers
async function generateText(prompt, model) {
  return await gateway.chat({
    model: model, // 'gpt-4', 'claude-3-opus', etc.
    messages: [{ role: 'user', content: prompt }],
    
    // Built-in features
    fallback: true,     // Auto-failover
    cache: true,        // Smart caching
    retries: 3          // Auto-retry
  });
}

// Switch models with one line
const result = await generateText(
  'Explain quantum computing',
  'claude-3-opus'  // or 'gpt-4', 'gemini-pro'
);

Timeline

Migration Schedule

Week 1 — Preparation

Assessment & Planning

Complete API audit, document all endpoints in use, identify high-traffic features, establish success metrics and rollback procedures.

Week 2 — Development

Gateway Configuration

Set up gateway account, configure routing rules, implement in staging, run parallel tests against direct API responses for validation.

Week 3 — Migration

Phased Rollout

Migrate low-traffic endpoints first, monitor error rates, gradually shift traffic to gateway, maintain direct API fallback during transition.

Week 4 — Optimization

Performance Tuning

Enable advanced features like caching and fallbacks, optimize routing for cost and speed, remove direct API dependencies, document new architecture.

Benefits

Migration Advantages

Reduced Complexity

Eliminate separate SDKs for each provider. One integration handles OpenAI, Anthropic, Google, and more. Maintenance burden drops by 75%.

Cost Visibility

Unified dashboard shows spend across all providers. Set budgets, receive alerts, and optimize costs with detailed analytics per endpoint.

High Availability

Automatic failover when providers experience outages. Route to alternative models without code changes. Achieve 99.9%+ uptime.

Flexibility

Switch models with a parameter change. A/B test different providers. Always use the optimal model for each use case without refactoring.

Smart Caching

Automatic response caching reduces duplicate API calls by 40-60%. Lower costs and faster response times for common queries.

Observability

Comprehensive logging, metrics, and tracing. Debug issues faster with request history and detailed error context across all providers.

Checklist

Migration Checklist

Pre-Migration

Audit all current API endpoints and usage patterns

Document provider-specific configurations and custom logic

Establish baseline metrics (latency, cost, error rates)

Create rollback plan and maintain direct API access

Set up staging environment for parallel testing

Review security requirements and compliance needs

Brief team on migration timeline and expectations

Post-Migration

Verify all endpoints return expected responses

Compare cost metrics against baseline

Enable caching for frequently-used queries

Configure fallback providers for critical paths

Remove direct API keys from codebase and secrets

Update documentation with new architecture

Set up monitoring alerts for gateway issues

Ready to Migrate?

Start with our free tier and migrate at your own pace. Our team provides dedicated support for enterprise migrations with custom SLAs.

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