Introducing the API 200 JavaScript/TypeScript SDK: Zero-Config, Fully-Typed API Clients

As API sprawl grows and integration complexity soars, developers and engineering leaders need tooling that cuts through the noise—letting teams focus on product logic rather than reinventing HTTP clients and error-handling patterns. Today, we’re excited to announce the GA release of the API200 JavaScript/TypeScript SDK Generator, a zero-config CLI that produces a fully-typed, battle-tested client library for your API200-proxyed services in under one minute.

Why a First-Class SDK Matters

Even seasoned teams spend countless hours on boilerplate: wiring up authentication headers, marshaling path and query parameters, typing request bodies, and normalizing error shapes. Those repetitive tasks:

• Slow down feature delivery: Engineers juggle API plumbing instead of product logic.
• Introduce inconsistency: Hand-rolled clients can vary across services and repos.
• Increase runtime risk: Typos or mismatched types only surface at runtime.

With the new API200 SDK Generator, you get:

1. Instant Type Safety TypeScript interfaces are generated directly from your API schemas. Your IDE flags mismatches at compile time, preventing 90% of “why does this payload look wrong?” bugs before they ever reach staging.

2. Zero Configuration Run one command—npx api200-generate-sdk -t YOUR_API_TOKEN—and the tool discovers your registered services, introspects OpenAPI/Swagger-like definitions in API200, and emits client code with sensible defaults.

3. Complete Feature Coverage

   • Path and query parameters
   • Fully-typed request bodies (POST/PUT/PATCH)
   • Structured error objects with HTTP status codes
   • Built-in retry and timeout settings drawn from your API200 configuration

4. Unparalleled DX Out-of-the-box IntelliSense and autocomplete for every endpoint and data shape. No more cross-referencing docs—just write api200.orders.createOrder.post({ … }) and let your editor guide you.

Getting Started

Prerequisites

• An active API200 account with your APIs imported or defined.
• A valid API token from your API200 dashboard.

Install & Generate

No global installs needed—just execute:

npx api200-generate-sdk -t YOUR_API_TOKEN

You can override defaults:

# Custom output folder
npx api200-generate-sdk -t YOUR_API_TOKEN -o ./src/lib/api200

# Point at another region
npx api200-generate-sdk -t YOUR_API_TOKEN -u https://us.api200.co/api

Peek at the Generated Structure

lib/api200/
├── index.ts          # Exports a pre-configured SDK client
├── api200.ts         # Core HTTP client + request pipeline
├── types.ts          # All generated TypeScript interfaces
└── users.ts          # Typed methods for your /users service

Deep Dive: How It Works

1. Schema Introspection Your registered services in API200 expose Swagger-compatible definitions. The CLI fetches these specs and uses a lightweight parser to emit interfaces and method signatures.

2. Smart Defaults

• Base URL and authentication are wired into the api200.ts client.
• Retry logic, timeouts, and caching respect the rules you’ve configured in the API200 dashboard.
• Error shapes conform to a single API200Response<T> union:

interface API200Response<T> {
  data: T | null;
  error: { message: string; status?: number; details?: any } | null;
}

3. Idempotent Regeneration When you add or modify services in API200, simply re-run the generator. It:

• Updates existing type definitions.
• Appends new methods for newly added endpoints.
• Leaves any local customizations (e.g., hand-written wrappers) untouched.

Usage Example

import api200 from './lib/api200';

// Fetch a single user by ID
async function showUser(userId: string) {
  const { data, error } = await api200.users.getUserById.get({ id: userId });
  if (error) {
    // error.status and error.details help pinpoint issues
    console.error(`Error ${error.status}:`, error.details);
    return;
  }
  console.log('User payload has type:', typeof data, data);
}

// Create a new order
async function placeOrder(orderPayload: NewOrder) {
  const { data, error } = await api200.orders.createOrder.post({ body: orderPayload });
  if (error) throw new Error(`Order failed: ${error.message}`);
  return data;
}

How This Solves Common Pain Points

Building and maintaining HTTP clients for each service quickly becomes tedious—developers end up writing manual fetch or Axios setup code that varies from team to team. This fragmented approach leads to inconsistent implementations and scattered error-handling logic across repositories. With the API200 SDK Generator, a single CLI invocation produces a fully typed client library, eliminating repetitive boilerplate and ensuring that every team uses the same API200Response<T> pattern for errors.

Documentation drift is another common headache: teams copy cURL snippets into Markdown files that go out of date as endpoints evolve. In contrast, the SDK Generator introspects your live API200 definitions and emits up-to-date TypeScript interfaces, so your IDE always reflects the latest schemas.

Cross-team consistency and maintenance become trivial when all client code stems from one authoritative source. Simply regenerate your SDK whenever services change in API200, commit the updated files, and every consuming project immediately benefits from new endpoints or type fixes—no more hand-rolled updates or manual syncs between repos.

Getting Help and Support

If you run into any issues, join the conversation on GitHub Discussions or drop us a note via the in-app support widget. Our core team is monitoring community feedback to guide upcoming features—like per-method caching controls and custom serializer hooks.

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With the API200 SDK Generator, you’ll eliminate the tedium of client construction and spend more time shipping features that delight your users. Give it a try today and reclaim your development velocity!