Free tools
3 tools that run entirely in your browser. No sign-up, nothing you type is sent to us, and every number comes from the same rates and setups we use for the gateway.
01 · A ranked monthly cost per model
Enter requests per day and tokens per request. See the monthly cost on every model at our published rates, side by side.
Open the calculatorCheapest, middle and most expensive of 11 models at current rates.
02 · Copy-ready env lines and config files
Pick a coding agent, a model and your shell. Get the exact environment variables and config file for that combination. Covers Claude Code, Codex CLI, Cursor, Cline, Kilo Code, OpenCode, Aider, Zed.
Claude Code · bash
# this terminal only
export ANTHROPIC_BASE_URL="https://api.oneaiapikey.com"
export ANTHROPIC_AUTH_TOKEN="sk-your-key-here"
export ANTHROPIC_MODEL="claude-sonnet-5"03 · A token range and cost per model
Paste a prompt or a document. Get a token range from two documented rules of thumb and what it would cost on each model.
They answer the questions people ask before they use an API gateway: what it will cost, how to point a tool at it, and how big a prompt is. If you then want one prepaid key for all 11 models, that is what Relaykit sells.