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Access all top AI models with just one unified API Key

Connect and switch seamlessly between OpenAI, Anthropic, Google Gemini, and open models without juggling multiple accounts, separate billing, or complex code changes.5 min readUpdated Sep 24, 2026

The simplicity of a single API Key#

When building AI applications or modern chatbots, teams often want to leverage different models for different tasks: GPT for complex reasoning, Claude for top-tier coding and nuanced writing, or Gemini Flash for fast responses at low cost.

Managing individual accounts across multiple providers, tracking separate credit card bills, and rotating disparate API keys quickly becomes an operational burden. XPNCORE solves this by bringing everything together under one cohesive platform: you only need a single Base URL and one API Key to call any model you need.

Keep the OpenAI, Anthropic or Gemini SDK you already use#

You do not need to learn custom APIs or install specialized libraries. XPNCORE accepts requests in the OpenAI (Chat Completions, Responses), Anthropic Messages and Google Gemini formats. Whether you use the OpenAI, Anthropic or Gemini SDK, in Python, TypeScript, Go or any other language, switching to XPNCORE takes less than a minute:

  1. Point your base_url to the XPNCORE endpoint.
  2. Set your api_key to your platform API key generated in the dashboard.
  3. Set model to a model ID from the Models & Pricing page or from GET /v1/models (a single model or a combo).

All standard features — streaming responses token by token, tool calling (function calling), and vision capabilities — function seamlessly right out of the box.

Automatic failover keeps your app online 24/7#

One of the biggest risks when building on third-party AI APIs is service degradation, unexpected outages, or rate limit spikes (HTTP 429). When connecting directly, a single provider hiccup immediately breaks the user experience in your application.

With XPNCORE, intelligent routing monitors connections in real time. If a provider experiences temporary downtime or severe latency, the gateway transparently reroutes your request to a healthy fallback source in milliseconds. Your end users enjoy continuous reliability without requiring you to manually monitor server statuses or rewrite failover logic.

Get started in just a few clicks#

  • Step 1: Head over to the Dashboard and create a new key under "API Keys". Name it after your project (for example, "Support Chatbot").
  • Step 2: Add balance to your wallet. Every call is billed transparently based on actual tokens used — no monthly subscription locks or hidden fees.
  • Step 3: Test out prompts and compare model responses directly in our built-in Playground.
  • Step 4: Copy the ready-made code snippet into your application and start building.

Integrating world-class AI into your software is now faster, more dependable, and more cost-effective than ever.

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