Free tools for AI API users
Small tools for people who build with AI APIs: estimate what a workload costs before you run it, find out why a request fails, and show your users whether the models behind your app are up. Free, no sign-up.
AI API cost calculator
Compare up to 3 models side by side: cost per request, per day and per month in USD and rupiah, with live prices and presets for Claude Code, a WhatsApp bot and n8n.
Open →API key & base URL checker
Find out why a request fails: checks the base URL, tests the key from your own browser, and explains 401, 403, 404, 429 and 5xx errors with copy-paste curl commands.
Open →AI model status widget
Show the live uptime of the models your app uses on your website, docs or GitHub README: an image badge or an embeddable card, no cookies and no scripts.
Open →
More help: Setup guides · AI API errors explained · Price table per 1M tokens · All models