Quickstart

1. Get your API key#

Sign up at opengateway.ai, open API Keys, and click Create Key. Copy the key immediately. It is only displayed once.

export OPENGATEWAY_API_KEY="YOUR_API_KEY"

2. Make your first call#

Pick the style that matches your stack. The examples below produce the same response.

curl https://apis.opengateway.ai/v1/chat/completions \
  -H "Authorization: Bearer $OPENGATEWAY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-4o-mini",
    "messages": [{"role": "user", "content": "Hello, opengateway!"}]
  }'

3. Swap the model#

The same OpenAI-compatible request shape works across supported providers. Try each of the following model IDs in the model field:

openai/gpt-4o-mini        # cheap and fast
openai/gpt-4o             # balanced
anthropic/claude-sonnet-4 # top-tier reasoning
google/gemini-2.5-pro     # long context and multimodal

The full catalog is on the Models page.

4. See what just happened#

Open the dashboard. Your request is already there, along with its token counts, cost, latency, and the provider that served it. You did not have to install anything.

Next steps#