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API quickstart: first Claude, GPT or Gemini call

Send your first request to Claude, GPT or Gemini through one OpenAI-compatible endpoint, in five steps.

Updated October 3, 2026
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If your code already talks to OpenAI or Anthropic, the change is two lines: the base URL and the key. These steps take you from a new account to the model's first reply, and the last example comes in four languages: cURL, Python, JavaScript and PowerShell.

  1. Create your account#

    Sign up with your email, or continue with Google or GitHub. We ask for a phone number once so we can reach you about your account or balance.

    Create an accountAfter sign-up you land right on the create-key page.

  2. Top up your balance#

    API requests are paid from your balance as you go, and every model costs less than its official price. Before you pay, the top-up screen shows the balance that will be added to your account. Details in Pricing and balance.

    Claude Sonnet 5.5 price per 1M tokens
    Input$0.60Official price: $2
    Output$3Official price: $10

    Official price from the provider's page, checked October 19, 2026.

  3. Create an API key#

    In your dashboard open API → Keys and create a key for the provider whose models you want. Copy it into an environment variable:

    export KHABEER_API_KEY="YOUR_5ABEER_API_KEY"

  4. Pick your base URL#

    Use the URL that matches the code you already have. Each format reads the key from its usual header.

    OpenAI-compatiblehttps://api.5abeer.ai/v1Authorization: Bearer <KEY>
    Anthropic-compatiblehttps://api.5abeer.aix-api-key: <KEY>
    Geminihttps://api.5abeer.ai/v1betax-goog-api-key: <KEY>

  5. Send your first request#

    Copy the example and run it in the terminal where you saved the key. Pick the format and the language; you can switch the model from the menu above the code.

    curl --request POST "https://api.5abeer.ai/v1/chat/completions" \
  --header "Authorization: Bearer $KHABEER_API_KEY" \
  --header "Content-Type: application/json" \
  --data '{"model":"claude-sonnet-5.5","messages":[{"role":"user","content":"Write a product idea in one sentence."}]}'
    Response
    {
  "id": "chatcmpl-9f2",
  "object": "chat.completion",
  "model": "claude-sonnet-5.5",
  "choices": [
    {
      "index": 0,
      "message": {
        "role": "assistant",
        "content": "Hello! How can I help you today?"
      },
      "finish_reason": "stop"
    }
  ],
  "usage": {
    "prompt_tokens": 21,
    "completion_tokens": 12,
    "total_tokens": 33
  }
}

    The key is read from KHABEER_API_KEY, so it never appears in your code.

    If you get a reply shaped like the one under the code, everything works.

If the request fails#

  • INVALID_API_KEY: the key is wrong or was copied incompletely. Check that the environment variable is set in the same terminal.
  • INSUFFICIENT_BALANCE: your balance doesn't cover this request. Top up, then try again.
  • MODEL_PLATFORM_NOT_ALLOWED: the key belongs to another provider. Create a key for this model's provider.

Every code and what it means is in Errors and fixes.

What's next#

Ready-made librariesBase URLsUse the OpenAI or Anthropic library without changing your code.GuideClaude CodeRun the terminal coding agent on our models.ModelsModels and pricesOur price next to the official one, for every model.