Krater API: Access 350+ AI Models with One API Key

The Krater API gives developers access to 350+ AI models through a single OpenAI-compatible REST API key — covering text, image, video, audio, and code across 18 endpoints. Instead of integrating separate SDKs for OpenAI, Anthropic, Google, and others, developers can route all model calls through one key with one monthly bill. The Krater API is available on Ultra ($49 per month) and Max (

19 per month) plans, making it a practical choice for teams building multi-model AI applications who want to avoid provider lock-in and API integration complexity.

Introducing the Krater API: Access 350+ AI Models with One API Key

One API. Every Model. Zero Vendor Lock-In.

Building AI-powered applications usually means juggling multiple API keys, managing separate billing accounts, and writing provider-specific integration code for each model you want to use. Today, that changes.

The Krater API gives developers access to 350+ AI models — including GPT-5.2, Claude Sonnet 5, Gemini 3, DeepSeek V3, Grok 3, Llama 4, and Mistral 3 — through a single, OpenAI-compatible REST API. One key, one bill, every model.

OpenAI-Compatible by Design

The Krater API follows the OpenAI API specification, which means you can switch from OpenAI (or any OpenAI-compatible provider) by changing two lines of code: the base URL and your API key. Your existing code, SDKs, and tools work immediately.

import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.krater.ai/v1",
  apiKey: "kr_live_your_key_here",
});

const response = await client.chat.completions.create({
  model: "gpt-5.2",
  messages: [{ role: "user", content: "Hello!" }],
});

That's it. No SDK changes, no new libraries, no migration headaches.

What You Can Build

The Krater API exposes 18 endpoints covering every AI capability on the platform:

Chat completions — Text generation with any of 350+ models, with streaming support
Image generation — Create images with multiple AI image models
Video generation — Generate AI videos programmatically
Audio generation — Text-to-speech and music generation
Code execution — Run Python code in a sandboxed environment
Document analysis — Extract and analyze content from PDFs and documents
Web search — AI-powered web search and research

Credit-Based Pricing That Scales

The Krater API shares your existing credit balance — no separate billing. If you have an Ultra plan ($49/mo, 4,000 credits) or Max plan ($99/mo, 10,000 credits), your API usage draws from the same pool as your web usage.

Each API key comes with configurable rate limits:

Default rate limit: 60 requests per minute
Default daily credit limit: 5,000 credits per key
Custom limits: Need higher throughput? Contact api@krater.ai for per-key adjustments

Security First

API keys are hashed server-side — we never store your raw key. Every request is audited, and you can revoke keys instantly from your account settings. Additional protections include a 50MB request body limit and 5-minute streaming timeouts to prevent abuse.

Who Gets Access

The Krater API is currently in Beta and available to Ultra ($49/mo) and Max ($99/mo) subscribers. Generate your first API key in Settings → API Keys.

Full documentation, endpoint references, and code examples in multiple languages are available at api.krater.ai.

Getting Started in 60 Seconds

Subscribe to Ultra or Max
Go to Settings → API Keys and create a new key
Copy your kr_live_ key (shown once — save it securely)
Point your OpenAI SDK to https://api.krater.ai/v1
Start building

Can I use the API with the OpenAI Python/Node SDK?

Yes. The Krater API is fully OpenAI-compatible. Just change the base_url to https://api.krater.ai/v1 and use your kr_live_ API key. All official OpenAI SDKs and community tools work out of the box.

Does the API have separate billing?

No. The API shares your subscription's credit balance. If you have 4,000 monthly credits on Ultra, both your web usage and API usage draw from the same pool.

What happens if I hit my rate limit?

You'll receive a 429 status code with a retry-after header. Default limits are 60 requests/minute and 5,000 credits/day per key. Contact api@krater.ai if you need higher limits.

Is streaming supported?

Yes. All chat completion endpoints support server-sent events (SSE) streaming, just like the OpenAI API. Set stream: true in your request body.

Introducing the Krater API: Access 350+ AI Models with One API Key